go to Chemical Reactions (6 of 11) Quick Review 5 Types of Chemical Reactions by "step by step science" to get info
Many chemical reactions in your body can convert reactants to products without an enzyme, even if the process is not efficient. However, if the same chemical reaction runs with an enzyme, how would the following aspects be affected?.
Enzymes share two key characteristics with all other catalysts - First, they speed up chemical reactions without being consumed or irreversibly changed by the process and secondly, they also speed up reactions while maintaining the chemical balance between reactants and products.
A drop in the activation energy barrier occurs when an enzyme is present. The quantity of product molecules stays constant. However, there will be a rise in the reaction rate, or the number of product molecules created per unit time. The products' final energy is unchanged from an uncatalyzed process. The reaction's rate quickens. As a result, there are still the same amount of reactant molecules. The amount of substrate molecules converted to products per unit of time will grow, but not the reaction rate. The reactants' initial energy is unchanged from an uncatalyzed reaction.
The free energy of the reactants or products is unaffected by enzymes. Instead, enzymes reduce the energy of the unstable transition state, which reactants must proceed through in order to become products.
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Which statement about atoms is false ?
Answer:
Following Statement is false: Atoms have an overall negative charge
Explanation:
hope it helps
. Use the diagram below.
Which wave has the lowest
frequency: top one or bottom one?
What is changed about the wave if
the frequency is changed?
wwwwww
A. Bottom one; wavelength changes
when frequency changes
B. Top one-wavelength changes
when frequency changes
Bottom one; wavelength changes when the frequency changed.
whenever frequency shifts Consequently, a wave's wavelength rose as its frequency fell. An energetic wave with a short wavelength has a high frequency. Low frequency waves have lengthy wavelengths and little energy.
How does the wave change when the frequency does?
Small differences in the speed figures were due to experimental error rather than a physical law being demonstrated. The evidence is strong that wave frequency has no bearing on wave speed. While the wave speed was unchanged, a drop in wavelength was brought on by an increase in wave frequency.
The frequency of a sound wave remains constant while the wave speed and wavelength change when it enters a new medium.
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Use the information to answer the following question.
The solubility of a substance at varying temperatures is listed:
1.1 g solute per 100 g solution at 20oC
0.8 g of solute per 100 g solution at 30oC
0.4 g of solute per 100 g solution at 40oC
Based on the data, what can you infer about this solute?
A) The solute is a solid.
B) The solute is a liquid.
C) The solute is a gas.
D) The solute is concentrated.
Given the fact that the mass that dissolved is less as the temperature increases, it follows that the substance is a gas.
What is solubility?The term solubility has to do with the amount of a substance that could be seen to dissolve in water at a particular temperature. It is worthy of emphasis that the temperature of an object is very important in the discussion of the solubility of an object as seen here.
Now, we know that the solubility of a gas is exothermic. This implies that as the temperature is increased, the solubility of a gas decreases.
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for the sn2 reaction, draw the major organic product and select the correct (r) or (s) designation around the stereocenter carbon in the organic substrate and organic product. include wedge‑and‑dash bonds and draw hydrogen on a stereocenter.
For stereocenter carbons, the proper abbreviations are (S) for the organic substrate and (P) for the organic product (R).
This is further explained below.
What is a nucleophile?Generally, The reaction's substrate is denoted as S, and its output as R. because of it. The mechanism of the SN2 reaction may be stated succinctly as follows: This nucleophilic substitution procedure only needs one step.
The reaction is known as the SN2 reaction because two reactants are involved in the step that establishes the rate.
In the mechanism of the reaction, the nucleophile attacks the electrophile, leading to a transition phase in which the electrophile's alkyl group departs and the nucleophile forms a new bond with the still-present substrate.
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Balancing Equations
You will be shown three types of chemical reactions below. Balance the equations.
Answer:
zn +2Agno3= Zn(No3)2 +2Ag
summarize what you learned about acid and bases
Answer:
There are three major classifications of substances known as acids or bases. The Arrhenius definition states that an acid produces H+ in solution and a base produces OH-. This theory was developed by Svante Arrhenius in 1883. Later, two more sophisticated and general theories were proposed. These are the Brønsted-Lowry and the Lewis definitions of acids and bases. The Lewis theory is discussed elsewhere.
The Arrhenius Theory of Acids and Bases
In 1884, the Swedish chemist Svante Arrhenius proposed two specific classifications of compounds; acids and bases. When dissolved in an aqueous solution, certain ions were released into the solution. An Arrhenius acid is a compound that increases the concentration of H+ ions that are present when added to water. These H+ ions form the hydronium ion (H3O+) when they combine with water molecules. This process is represented in a chemical equation by adding H2O to the reactants side.
HCl(aq)→H+(aq)+Cl−(aq)(1)
In this reaction, hydrochloric acid ( HCl ) dissociates completely into hydrogen (H+) and chlorine (Cl-) ions when dissolved in water, thereby releasing H+ ions into solution. Formation of the hydronium ion equation:
HCl(aq)+H2O(l)→H3O+(aq)+Cl−(aq)(2)
The Arrhenius theory, which is the simplest and least general description of acids and bases, includes acids such as HClO4 and HBr and bases such as NaOH or Mg(OH)2 . For example the complete dissociation of HBr gas into water results generates free H3O+ ions.
HBr(g)+H2O(l)→H3O+(aq)+Br−(aq)(3)
This theory successfully describes how acids and bases react with each other to make water and salts. However, it does not explain why some substances that do not contain hydroxide ions, such as F− and NO−2 , can make basic solutions in water. The Brønsted-Lowry definition of acids and bases addresses this problem.
An Arrhenius base is a compound that increases the concentration of OH- ions that are present when added to water. The dissociation is represented by the following equation:
NaOH(aq)→Na+(aq)+OH−(aq)(4)
In this reaction, sodium hydroxide (NaOH) disassociates into sodium (Na+) and hydroxide (OH-) ions when dissolved in water, thereby releasing OH- ions into solution.
Phosphoric acid is delivered to a drinks factory in concentrated form. Why do you think the acid is not diluted before transporting it?
Please answer
The acid is transported in the concentrated form because it takes up a lesser volume.
What is dilution?The term dilution has to do with the process by which more water is added to the acid in order to reduce the strength of the acid. We have to note that the acid is stronger in the concentrated form because there is a very little amount of water that is found to be present in the concentrated acid as it is transported.
Let us note that when you dilute the acid, there would be an increase in the volume of the acid and this increase in the volume of the acid is going to raise the cost that is required in the transport of the acid.
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Which of the following methods would you use to prepare 1.00 L of 0.125 M sulfuric
acid?
100.mL
(a) Add 50.0 mL of 3.00 M sulfuric acid to 950. mL of water
(b) Add 20.8 mL of 6.00 M sulfuric acid to 979.2 mL of water
(c) Add 90.2 mL of 1.50 M sulfuric acid to 909.8 mL of water
There are two ways to make 1 liter of 0.125 molars of sulfuric acid. We will perform both calculations to show that only one of the two methods is correct.
Method A and Method B. Dilute the 20.8 mil guide in a 6.00 bowler and add H two s. 4:4 to 1.00 L. Let's see if that's correct. Use milliliters. Sometimes the similarity equals the middle leader sometimes the similarity equals her 20.8 million leaders multiplied by 6.00 Mueller equals 1000 ml times X, the resolution of X.
Get a calculator. 20.8 times 6 divided by 1, 1000 is 1.2 0.124 8 pitchers equals 0.125 moles. It looks pretty good. It seems like that's what we wanted to do. Method B assumes there are 9,500 hoops. 9.50 times 10 2 ml H2O 2 50 ml 3.00 molar sulfuric acid.0.0500 guide x 3.00 wolves per liter equals 0.1 50 moles. Then take 0.150 moles. Divide this by the total volume of 0.950L plus 0.050L. This was the leader .150 bowler which was undesirable. So this is a way to show that only one is correct.
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Lab Report Guide
2. What procedure did you use to complete the lab?
Outline the steps of the procedure in full sentences.
Answer:
To be lab-prepared one must follow these procedures-
1. One should have knowledge of lab assignments to make the lab experiment easier.
2. To be aware of safety equipment and its uses in the lab, like- the location of a fire extinguisher in the lab.
3. To know the steps of experiments to be performed
4. To fill the notebook of the lab with information regarding the experiment
5. One should review the data sheets of chemical material safety.
6. put on all the necessary dressings to perform the experiment.
7. To have a complete understanding of the experiment disposals.
is spraying paint from a spray can diffusion
A device sprays coating material (paint, ink, varnish, etc.) through the air onto a surface when using the spray painting technique. The most popular varieties atomize and guide the paint particles using compressed gas, often air.
How does spray paint work?Volatile Organic Compounds are present in a large number of commonly used professional spray paints (VOCs). VOCs are a group of compounds that are released as gases from a range of solids and liquids, some of which may be harmful to human health in the short- and long-term.
What qualifies as spray paint?When a valve button is depressed, aerosol paint, also known as spray paint, is released from a sealed, pressurized container in an aerosol spray. One type of spray painting is aerosol painting, which leaves a smooth, even coat in contrast to many conventional rolled and brushed paints.
Does paint undergo chemical reactions?Not every change in color results from a chemical shift. If one were to alter a substance's color through a non-chemical interaction, such as painting an automobile, the alteration would be physical rather than chemical.
Is spray paint a gas or a liquid?Spray paints come in aerosol cans and are liquid paints. The top of a can of spray paint has a button that, when depressed, releases paint. Compressed gas is used in aerosol spray cans as a liquid propellant.
Is spray paint distinct from regular paint?A million times faster than brush-on paint is spray paint. Since spray paint is often oil based rather than water based, it is more durable than conventional latex paint or spray paint. Using spray paint outside is simple when you have a drop cloth and some newspaper handy.
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Question 1 (1 point)
The electron configurations of two unknown atoms are shown.
Electron Configuration
Based on the electron configuration of each atom, what is the number of valence electrons for each atom?
a Atom X = 1; Atom Y = 1
b Atom X = 1; Atom Y = 7
c Atom X = 10; Atom Y = 10
d Atom X = 11; Atom Y = 17
Answer:
b Atom X = 1; Atom Y = 7
Explanation:
a valence electron is an electron in the outer shell
So X has 1 in outer shell
Y has 7 in outer shell
Give the relative charges of these sub-atomic particles.
Neutrons
protons, electrons
Answer:
neutrons : It has no electric charge and a rest mass equal to 1.67492749804 × 10−27 kg
electrons : It carries a negative charge of 1.602176634 × 10−19 coulomb
protons : positive electrical charge of one (+1) and a mass of 1 atomic mass unit (amu), which is about 1.67×10−27
Answer:
Neutrons are neutrally charged, that is to say they don't have a positive or negative charge and are uncharged.
Protons have a positive charge.
Electrons have a negative charge.
The atom itself as a whole is neutral as the protons and electrons balance each others' charge.
hope it helps
pls help with this!!!
molecules are often more than 1 of same element together in nature
like oxygen O is O2 is nature
in this assignment molecules are the number in front of the compound
so 3H20 means 3 molecules of H20 or water
compound are different elements together to make something else
al(oh)2
aluminum hydroxide or antacid
AL 1 O 2 H 2
total 5
molecule 1
Elements 3
3H2O
water
H 6 0 3
total 9
molecules 3
elements 2
NA2CO3
sodium carbonate or soda ash
NA 2 C 1 O 3
total 6
molecules 1
elements 3
one without a name is
FE2O3
iron oxide or rust
FE 2 O 3
total 5
molecules 2
elements 2
Co
C≡O
carbon dioxide
dangerous odorless gas
found in car & engine & generator & kitchen stove exhaust
dangerous because the human body can take it in its blood thinking it to be oxygen
C 1 O 1
total 2
molecules 1
elements 2
equal masses of helium and neon are placed in separate containers of equal vat the same t. compare the number of atoms in each container. select an answer and submit. for keyboard navigation, use the up/down arrow keys to select an answer. a there are more atoms of helium than of neon. b there are more atoms of neon than of helium. c there are as many atoms of helium as there are of neon.
Using the molar masses of helium and neon, as well as Avogadro's number, we can see that there are more helium atoms than there are neon atoms.
Let us assume we have 100 g of helium and 100 g of neon. In order to calculate the number of atoms, we need to first calculate the number of moles of each gas. We can do this by using their respective molar masses (4 g/mol for He, and 20 for Ne):
n(He) = m(He) / M(He) = 100 g / 4 g/mol = 25 mol of He
n(Ne) = m(Ne) / M(Ne) = 100 g / 20 g/mol = 5 mol of Ne
Now we can use Avogadro's number (6.022e23/mol) to calculate the number of atoms present in both gas samples:
N(He atoms) = 25 mol * 6.022e23/mol = 150.55e23 He atoms
N(Ne atoms) = 5 mol * 6.022e23/mol = 30.11e23 Ne atoms
Obviously, we have 5 times more He atoms than Ne atoms.
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hellpppppp pleaseeeee !!
Answer:
Addition of impurities (eg salt) raises the boiling point of water.
where protons are located in this carbon atom.
Answer:
In every atom, protons are located in the nucleus
Explanation:
You clicked the orbit of an electron in the photo. The electrons orbit the nucleus in the orbital empty space. Protons and neutrons compose the nucleus of every atom.
hope this helps :)
please crown me brainliest!!!
A) Since, "like dissolves like" the anion of KCl will be attracted to the anion of the water and allow the KCl to dissolve and go into solution.
B) KCl is surrounded by the nonpolar H2O to form an electrolyte solution which can conduct electricity.
C) KCl is surrounded by the polar H2O to form an electrolyte solution which can conduct electricity.
D) Water attracts the ions to allow the potassium cation to be separated from the chloride anion and go into solution.
As shown in the solvation of KCl in water, water attracts the ions to allow the potassium cation to be separated from the chloride anion and go into solution; option D.
What is solvation?Solvation is the process by which solvent molecules in which a solute is dissolved interact with the molecules of the solute.
Solvation is also known as dissolution.
The principle of dissolution of substances states that like dissolves like.
This implies that polar or ionic substances will dissolve easily in polar solvents whereas non-polar solutes will dissolve in non-polar solvents.
Therefore, when an ionic compound such as KCl is dissolved in a polar solvent such as water, the solvent molecules will interact with the ions of K and Cl produced when the solute dissolves.
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you are extracting water-soluble impurities from your organic-soluble compound. mark where your aqueous (a) and organic (o) layers would be for the following organic solvents:
Soluble water contaminants, such as Calcium chloride, calcium sulphate, calcium bicarbonate, magnesium chloride, magnesium sulphate, magnesium bicarbonate, sodium chloride, sodium sulphate, sodium carbonate, and organic matter.
The more prevalent soluble contaminants are sugar, salt, and milk, are impurities that dissolve in water.
Organic substances typically dissolve easily in solvents with attributes comparable to their own. Like dissolves like, also known as the "like dissolves like" principle, states that non-polar molecules will typically dissolve in non-polar solvents and polar molecules will typically dissolve effectively in polar solvents.
Organic solvents are chemicals with a carbon structure that can dissolve or disperse one or more other compounds.
Organic solvents have the potential to be neurotoxins, genital poisons, and carcinogens.
The organic solvents benzene, carbon tetrachloride, and trichloroethylene are carcinogenic.
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in an experiment, 200 g of aluminum (with a specific heat of 900 j/kgk) at 100 degrees celsius is mixed with 50.0 g of water at 20.0 degrees celsius, with the mixture thermally isolated. (a) what is the equilibrium temperature? what are the entropy changes of (b) the aluminum, (c) the water, and (d) the aluminum –water system?
(a) Water has a specific heat of 4190J/kgK while aluminum has a specific heat of 900J/kgK.
Therefore,
[tex]T_{f}[/tex]= (0.200kg)(900J/kg⋅K)+(0.0500kg)(4190J/kg⋅K) / (0.200kg)(900J/kg⋅K)(100°C)+(0.0500kg)(4190J/kg⋅K)(20°C)
= 57°C = 330K
(b) The following temperatures must now be stated in Kelvins: [tex]T_{ai}[/tex] = 393, [tex]T_{wi}[/tex] = 293
[tex]T_{f}[/tex] =330K dQ=[tex]m_{a}[/tex][tex]c_{a}[/tex] dT for aluminum, and the entropy change is
= Δ[tex]S_{a}[/tex] = ∫[tex]\frac{dQ}{T}[/tex] = [tex]m_{a}[/tex][tex]c_{a}[/tex] ∫(from [tex]T_{f}[/tex] to tai) [tex]\frac{dT}{T}[/tex] = [tex]m_{a}[/tex][tex]c_{a}[/tex] ln [tex]T_{f}[/tex]/ Tai
= (0.200kg)(900J/kg.K) ln (330K/373K)
= -22.1 J/K
(c) For water, the entropy change is
Δ[tex]S_{w}[/tex] = ∫[tex]\frac{dQ}{T}[/tex] = [tex]m_{w}[/tex][tex]c_{w}[/tex] ∫(from [tex]T_{f}[/tex] to tw1)[tex]\frac{dT}{T}[/tex] = [tex]m_{w}[/tex][tex]c_{w}[/tex] ln [tex]T_{f}[/tex]/ Twi
= (0.0500kg)(4190J/kg.K) ln(330K/373K)
= + 24.9J/K
(d) The change in the aluminum-water system's overall entropy is
ΔS=ΔSa+ΔSw =−22.1J/K+24.9J/K = +2.8J/K
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What is the ion symbol for the ion that has 15 protons and 18 electrons
Answer:ScienceBiochemistryQ&A LibraryAn ion has 15 protons, 16 neutrons, and 18 electrons. The symbol for the ion is 31P3+. 31P3-.
Explanation:
Two samples contain carbon and
hydrogen in the amounts shown in
the data table.
What is the mass percent of
hydrogen in compound 1?
Carbon (g) Hydrogen (g)
Compound 1
Compound 2
15.0
22.5
% Hydrogen
5.0
7.5
Total Mass of
Sample (g)
20.00
30.00
Answer: 25%
Explanation: To find the mass percentage of a chemical you need to do mass/total mass x 100 = %.
In this case you would do 5.0/20.00 because 5.0 is the mass of the hydrogen and 20.00 is the total mass. That equals .25 so the next step is to times that by 100.
.25 x 100 = 25, so we know that the percent of the hydrogen mass in compound 1 = 25%
Does anyone know compound 2?? I’m stuck I don’t know how to do this
12. Calculate the molar mass of a compound given that 0.035g of the gaseous compound
occupied 30cm³ at r.t.p.
a) 26.1g/mol
b) 28g/mol
c) 27.6g/mol
d) 56g/mol
Pls an answer I have an exam!!!
If you find I’ll mark you brainliest
can energy be released when matter changes? Can it be absorbed? Can a change in matter take place in which energy is neither released nor absorbed?
Answer:
Yes, energy can be released when matter changes. In physical changes, such as phase changes, energy is released when changing from a higher energy state to a lower energy state. An example of this is when gaseous water condenses into the liquid phase.
Yes, energy is always either released or absorbed during a chemical reaction. This is because all chemical reactions involve energy. In any chemical reaction, energy is required to break the bonds in reactions, and energy is released when new bonds form after the reaction.
And no energy cannot change in matter or take place in which energy is neither releasedreased nor absorbed.
Explanation:
Societal and environmental impacts of Nanoparticles in medicine and effectiveness to society and health
Help ASAP
The term "emerging technology" is frequently used to characterize nanotechnology, which has the potential to not only benefit society but also fundamentally alter how we solve everyday issues.
NanoparticlesMaterials having the overall dimensions in the nanoscale, or under 100 nm, are cordially referred to as nanoparticles.
These kinds of materials have recently become very significant players in contemporary medicine, with all sorts of therapeutic uses ranging from contrast agents in imaging to the carriers for the transport of drugs and genes into malignancies.
In fact, there are also some situations where using nanoparticles makes it possible to perform studies and treatments that would otherwise be impossible. However, because of their toxicity nature in particular, nanoparticles pose special environmental and socioeconomic problems.
This review will thus help to explore the societal and environmental implications of nanoparticle use and along with its well as the significant contributions that nanoparticles have made to modern medicine.
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At a fixed temperature and pressure, the volume occupied by a gas is _____ proportional to the number of moles of gas present. For ideal gases under these conditions, equal _____ of gas contain equal numbers of particles or moles.
Answer:
Directly & Pressure
Explanation:
Oumm...I don't know if it's right but correct me if I'm wrong
Pen drop
Gideon is holding a pen in his hand, 1 m off the floor. While he is distracted, it
slips out of his hand and falls to the floor.
1. How long does it take to reach the floor
2. If he dropped a quarter at the same time, how long would it take to hit the floor
It takes 0.44 seconds to reach the floor and it would take the same time to hit the floor If he dropped a quarter at the same time 1 m off the floor which is on motion due to gravity.
What do you mean by the motion done by a gravitational field?When any object moves, it is said to be under motion under gravity since gravity has an impact on the object’s vertical motion. GRAVITY is the force that pulls down things downward and in actuality, gravity pulls objects toward the Earth’s center.
The particle’s initial velocity is 0 during free fall. Consequently, v=gt is said as the equation of motion.
What movements are brought on by gravity?An object launched into the air may also experience a shift in upward velocity due to gravity, which causes it to slow down and return to Earth’s surface.
The Moon is kept in an orbit with the pull of Earth’s gravity. Due to gravity, the Moon continuously changes direction.
1. Time t =?
u = 0
h = ut - [tex]\frac{1}{2}[/tex][tex]gt^2[/tex]
1 = [tex]\frac{10}{2}t^2[/tex]
t = [tex]\sqrt{\frac{1}{5} }[/tex] = 0.44 seconds
2. The quarter will take the same time as ink drop if we neglect the air drag.
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One difference between a reflux setup and a simple distillation setup is the presence of a __________ positioned between the reaction pot and the condenser.
One difference between a reflux setup and a simple distillation setup is the presence of a T-shaped three-way adapter positioned between the reaction pot and the condenser.
In the reflux setup, the condenser is mounted directly on the reaction flask.
The purpose of the reflux setup is to maintain the solvent in the reaction flask at boiling point while maintaining a constant volume of it. It is assumed that the boiling point of the solvent is known, so no thermometer is necessary.
On the other hand, the purpose of the distillation setup is to separate the liquid components of the mixture based on the difference in their boiling points. Because of this, we need to be able to gauge the temperature of the vapors entering the condenser, making the thermometer (and the T-shaped three-way adapter) necessary.
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What is the mass of a substance that has a density of 9.1 g/cm3 and has the dimensions of 2 cm high, 2 cm long and 2 cm wide? (m=D x V)
The mass of the substance would be 72.8g
Given,
The density of the substance = 9.1g/cm³
The Length of the substance = 2cm
The Breadth of the substance = 2cm
The Hight of the substance = 2cm
We know,
Mass = Density × Volume
And
Volume = l×b×h
= 2×2×2
= 8 cm³
Therefore the mass of the substance
= D×V
= (9.1 × 8) g
= 72.8g
So, the mass of a substance will be 72.8g
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A
A buffer solution is prepared by adding NaH₂PO4
to a solution of H3PO4 (phosphoric acid).
H3PO4 (aq) H+ (aq) + H₂PO4¯(aq)
What happens if KOH is added?
remains
the same
B
shifts to
reactants
shifts to
products
If KOH is added then the equilibrium will shift towards the products.
What is a buffer solution?
A weak acid and the conjugate base of the weak acid, or a weak base and the conjugate acid of the weak base, are combined to form the buffer solution, a water-based solvent solution.
They withstand being diluted or having modest amounts of acid or alkali added to them without changing their ph.
When a modest amount of a strong base is added here, the pH level should just slightly alter.
As a result, it ought to be moved to products.
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