Durante una determinación de acidez en una muestra contaminada, agregas como indicador fenolftaleina y torno a violeta. ¿Qué sustancia utilizarías para titular NaOH o HCI? Y ¿Por qué?

Answers

Answer 1

Answer:

HCl, ya que la sustancia es una base que se debe titular con un ácido.

Explanation:

¡Hola!

En este caso, teniendo en cuenta la descripción inicial de la sustancia, la cual se torna violeta cuando se le agrega la fenolftaleína, es posible inderir que esta sustancia es una base con pH básico. Ahora bien, en torno a la especificación de un proceso de titulación, es claro que dicha base debe ser titulada con un ácido, y este caso, con HCl, ácido chlorhídrico, con el fin the alcanzar el punto de equivalencia.

¡Saludos!


Related Questions

Which best describes what forms in nuclear fission?
two smaller, more stable nuclei
two larger, less stable nuclei
one smaller, less stable nucleus
one larger, more stable nucleus

Answers

Answer:

two smaller, more stable nuclei

Explanation:

Answer:

A. two smaller, more stable nuclei

Explanation:

Nuclear fission is the process in which a heavy nucleus is split into two large fragments of comparable mass to form more stable and smaller nuclei. This results in the release of great amounts of energy. Large nuclei are usually less stable, since it takes more energy to hold its structure together, the larger they are.

Here's a photo of Edge just incase.

give the equation
CO2(g) <- -> CO2(aq) if we add more CO2(g), carbon dioxide to the air what way would the reaction shift?​

Answers

Answer:

The equilibrium position shifts to the right.

This is due to excess carbon dioxide which supresses the reaction.

an equation thats shows how an objects acceleration relates to its mass

Answers

Answer:

Newton's second law of motion

F = ma

How many atoms would be contained in 454 grams of iron?

Answers

Answer:

4.90 x 10 24 atoms

Explanation:

the 24 is the exponent for the 10

What is the name for a star that has too low of a mass to start hydrogen fusion?
А.white dwarf
B.black dwarf
C.red dwarf
D. brown dwarf

Answers

Answer:

red dwarf

Explanation:

Answer:

D

Explanation:

please help! What is the empirical formula for a compound that has 1 mole of nitrogen and 2.5 moles of oxygen?

Answers

Answer:

[tex]N_{2}O_{5}[/tex]

Explanation:

usually, the first step is to calculate the moles but since that is already given in the question we can move onto the next step

least molar ratio:

N = [tex]\frac{1}{1}[/tex] = 1

O = [tex]\frac{2.5}{1}[/tex] = 2.5

when the answer is in decimals we will multiply it by an integer in order to make it a whole number (in this case 2)

O = 2.5(2) = 5

in order to balance, we will also multiply the atoms of N by the same integer

N = 1(2) = 2

thus, the empirical formula is [tex]N_{2}O_{5}[/tex]

True or False: Igneous rocks form from Sediment.

Answers

Answer:

true

Explanation:

Answer:

false

Explanation:

Sedimentary rocks form by breaking down other kinds of rocks into small particles and washing or blowing them away; metamorphic rocks form from other rocks and igneous rocks form by melting other rocks. ... Igneous Rocks: form by crystallizing melted material (magma).

=====answer this plss :(​

Answers

Answer:

Geothermal energy is an uptrending alternative source of production that relies on the earth's crust and elements of radioactivity.

Increase GDP expansion: Philippines could expand their production and hence their industrialization efforts to create a more economies of scales factoring.Produce a cleaner environment: With a cleaner environment with regards to pollution then the citizens can live at a lower mortality rate.

Describe the energy in nuclear fuel and the way in which it’s converted to electrical energy. Write 50 to 100 words.

Answers

Explanation:

You will have to rewrite this in your own words please. Download the app Paraphrase and also download Plagiarism Checker. Go on Paraphrase first and write it out then go to Plagiarism second and it'll tell you if you still need to reword it.

Answer:

A nuclear reactor produces electricity in much the same way other power plants do. The chain reaction produces the energy, which turns water into steam. The pressure of the steam turns a generator, which produces electricity.

Explanation:

Nuclear energy originates from the splitting of uranium atoms a process called fission. In nuclear fission, atoms are split apart to form smaller atoms, releasing energy. Fission takes place inside the reactor of a nuclear power plant. At the center of the reactor is the core, which contains uranium fuel. The uranium fuel is formed into ceramic pellets. Inside each uranium fuel pellet, there are millions of uranium nuclei. When these nuclei are split, a huge amount of energy is released. Some of this energy is from radiation, but the biggest source is kinetic energy. This is the energy that produces heat inside a reactor. The heat produced during nuclear fission in the reactor core is used to boil water into steam, which turns the blades of a steam turbine. As the turbine blades turn, they drive generators that make electricity. Nuclear plants cool the steam back into water in a separate structure at the power plant called a cooling tower, or they use water from ponds, rivers, or the ocean. The cooled water is then reused to produce steam.

2. The reaction of zinc with nitric acid was carried out in a calorimeter. This reaction caused the temperature
of 72.0 grams of liquid water, within the calorimeter, to raise from 25.0°C to 100.°С. Calculate the energy
associated with this reaction.

Answers

We want to solve Q = mcΔT for the liquid water; its change in temperature will tell us the amount of thermal energy that flowed out of the reaction. The specific heat, c, of water is 4.184 J/g °C.

Q = (72.0 g)(4.184 J/g °C)(100 °C - 25 °C) = 22593.6 J

Q ≈ 2.26 × 10⁴ J or 22.6 kJ (three significant figures).

describe the process of testing the pH of an unknown solution

Answers

A pH meter will make short work of identifying the pH of your solution. These meters have a glass probe that measures a solution's ion concentration. To use a pH meter, place a small portion of your solution in a beaker or test tube, rinse the probe of the pH meter, and then place the probe into your solution.

Source:

https://sciencing.com/identify-solution-neutral-base-acidic-8346.html

pH depend on the temperature. At room temperature pH scale is between 0 to 14. pH of neutral solution is 7. pH meter is the only instrument to measure the pH of an unknown solution.

What is pH?

pH is a measurement of amount of hydronium ion H₃O⁺ in a given sample. More the value of hydronium ion concentration, more will be the solution acidic.

On subtracting pH from 14, we get pOH which measures the concentration of hydroxide ion in a given solution.

pH meter is used to measure the pH of an unknown solution. A glass probe is attached to pH meters, that measure the concentration of hydrogen ion in unknown solution. Take the unknown solution in the beaker and then put the washed, clean glass probe in the solution. Now wait for a second to take the reading.

Therefore, pH meter is the only instrument to measure the pH of the solution.

To learn more about pH, here:

https://brainly.com/question/27945512

#SPJ2

What is the concentration expressed in parts per million of a solution containing 15.0 grams of KNO3 in 65.0 grams of H2O?

Answers

Answer:

The concentration will be "[tex]1.88\times 10^5 \ ppm[/tex]".

Explanation:

The given values are:

Mass of solute (KNO₃),

= 15.0 grams

Mass of solvent (H₂O),

= 65.0 grams

The concentration will be:

=  [tex]\frac{Mass \ of \ solute}{Mass \ of \ solution}\times 10^6[/tex]

On substituting the values, we get

=  [tex]\frac{15.0}{65.0+15.0}\times 10^6[/tex]

=  [tex]\frac{15.0}{80}\times 10^6[/tex]

=  [tex]0.1875\times 10^6[/tex]

=  [tex]187500 \ ppm[/tex]

or,

=  [tex]1.88\times 10^5 \ ppm[/tex]

Chemistry help!

Zoom in to see better!!​

Answers

Answer:

11.9 g of nitrogen monoxide

Explanation:

We'll begin by calculating the number of mole in 6.75 g of NH₃. This can be obtained as follow:

Mass of NH₃ = 6.75 g

Molar mass of NH₃ = 14 + (3×1)

= 14 + 3

= 17 g/mol

Mole of NH₃ =?

Mole = mass /molar mass

Mole of NH₃ = 6.75 / 17

Mole of NH₃ = 0.397 mole

Next, we shall determine the number of mole of NO produced by the reaction of 0.397 mole of NH₃. This can be obtained as follow:

4NH₃ + 5O₂ —> 4NO + 6H₂O

From the balanced equation above,

4 moles of NH₃ reacted to produce 4 moles of NO.

Therefore, 0.397 mole of NH₃ will also react to produce 0.397 mole of NO.

Finally, we shall determine the mass of 0.397 mole of NO. This can be obtained as follow:

Mole of NO = 0.397 mole

Molar mass of NO = 14 + 16 = 30 g/mol

Mass of NO =?

Mass = mole × molar mass

Mass of NO = 0.397 × 30

Mass of NO = 11.9 g

Thus, the mass of NO produced is 11.9 g

What is the pH of a 0.0001 M aqueous solution of HCI?

Answers

pH=4
-log(0.0001)=4

For the night yet balanced equation, No + CuCl2 —> Cu + NiCl3, if you started with 12.00 g of nickel and 42.00 g of CuCl2, how much Copper would you expect to produce Perdue

Answers

Answer:

19.45g of Cu are expect to be produced

Explanation:

Based on the reaction:

2Ni + 3CuCl2 → 3Cu + 2NiCl3

2 moles of Ni react with 3 moles of CuCl2 to produce 3 moles of Cu

To solve this question we must find the moles of each reactant in order to find the limiting reactant. With the limiting reactant we can find the moles of Cu produced and the mass as follows:

Moles Ni -Molar mass: 58.6934g/mol-

12.00g * (1mol / 58.6934g) = 0.204 moles Ni

Moles CuCl2 -Molar mass: 134.45g/mol-

42.00g * (1mol / 134.45g) = 0.312 moles CuCl2

For a complete reaction of 0.204 moles of Ni are required:

0.204 moles Ni * (3 moles CuCl2 / 2 moles Ni) = 0.306 moles of CuCl2

As there are 0.312 moles, CuCl2 is the excess reactant and Ni is limiting reactant.

Moles Cu:

0.204 moles Ni * (3moles Cu / 2 moles Ni) = 0.306 moles of Cu are produced

Mass Cu:

0.306 moles of Cu * (63.546g / mol) =

19.45g of Cu are expect to be produced

Plz help ASAP plz and thx if u help

Answers

Answer:

3.     c

4.     d

5.     c

Explanation:

The topic of stoichiometry includes all of these except

Answers

Answer:

B

Explanation:

The answr is B..........

The formula of a compound is M(OH)2 . Given that the Mr of compound is 98 , calculate Ar of M. (Ar of O = 16 , H = 1 ) WITH WOKING OUT

Answers

Answer:

The atomic weight Ar, of M is 64

Explanation:

The formula of the given compound is M(OH)₂

Mr, is the molecular weight of a compound and for the given compound, Mr is equal to 98.

Ar, is the atomic weight of the elements in the compound

The molecular weight, Mrof a compound is the mass of one mole mole of that compound. It can be obtained by summing the atomic masses of all elements in that compound. For elements that has more than one atom in the compound, the atomic weight of that element is multiplied by the number of atoms of the element present in the compound and then the sum of the weight of each element gives the molecular weight of the compound.

Onnthe compound above,the atomic weight of the unknown element M, is to be obtained.

Ar of the other elements inn he compound is given : Ar of O = 16, Ar of H = 1.

Molecular weight of the compound, Mr = 98

Calculating for the Ar of M:

(M × 1) + (16 × 2) + (1 × 2) = 98

M +32 + 2 = 98

M + 34 = 98

M = 98 -34

M = 64

Therefore, the atomic weight Ar, of M is 64

Which planet contains volcanoes, craters and an atmosphere? Please help

Answers

C. Venus is the answer..

The answer is planet Earth

37.2 moles of hydrogen gas would have what mass?
Your answer

Answers

Answer:

74.99g

Explanation:

Mass of a substance can be calculated by using the formula;

mole = mass ÷ molar mass

mass = molar mass × mole

According to this question, 37.2 moles of hydrogen gas is given.

Molar mass of hydrogen gas (H2) = 1.008(2) = 2.016g/mol

mass = 2.016 × 37.2

Mass of H2 = 74.995

Mass = 74.99g

What is the total volume of solution that was dispensed from this burette?
A. 32.3 ml
B. 32.9 ml
C. 0.6 ml
D. 32.6 ml
E. 65.2 ml

Answers

Answer:

it will a i did the quiz got it all right

Explanation:

Can you identify what object is being represented by the model on the right? gear clock battery

Answers

Answer:gear

Explanation:just did it right now

Answer: Gear

Explanation: just did it on Edge 2021

What is the same for all of the drilling sites we examined?

Answers

Answer:

the same is what is this question like what did u exame

A picture of the sites?

22.4 L of hydrogen is taken in a cylinder at zero degree Celsius and at one atm. This gas is transferred to a cylinder of 11.2 L capacity without change in temperature. The present pressure and mass of the gas is ....... & ......

Answers

Answer:

  2 Atm; 2.016 g

Explanation:

Changing the volume without changing the temperature or mass only changes the pressure. Volume and pressure are inversely proportional so halving the volume will double the pressure.

P = 1 Atm, T = 0 °C are "standard" temperature and pressure (STP). The volume of 1 mole of gas is 22.4 L under these conditions. That means the amount of hydrogen gas in the cylinder is 1 mole, so has a mass of 2.016 g.

After the volume reduction, the pressure is 2 Atm, and the mass remains 2.016 g.

Answer:

2 ATM ; 2.016 g

After the volume of reduction

Explanation:

hope it helps

Calculate the frequency in hertz of electromagnetic radiation that has a wavelength of 645.0 nm. (c = 3.00 X 10⁸ m/s)

Answers

Answer:

1/wavelength

c=1/alpha

Choose the larger atom from each pair, if possible.
a. Sn or Si,
b. Br or Ga,
c. Sn or Bi,
d. Se or Sn

Answers

Answer:

a. Sn or Si ⇒ Sn

b. Br or Ga ⇒ Ga

c. Sn or Bi ⇒ similar in size

d. Se or Sn ⇒ Sn

Explanation:

The larger atom has a larger atomic radius. We have to consider how varies the atomic radius for chemical elements in the Periodic Table. In a group (column), the atomic radius increases from top to bottom while in a period (file), it increases from right to left.

a. Sn or Si ⇒ Sn

They are in the same group. Sn is on the top, so it has a larger atomic radius.

b. Br or Ga ⇒ Ga

They are in the same period. Ga is located at the left so it has a larger atomic radius.

c. Sn or Bi ⇒ similar

They are not in the same group neither the same period. Bi is located more at the bottom, so it would be larger than Sn, but Bi is also at the right side, so it would be smaller than Bi. Thus, they have comparable sizes.

d. Se or Sn⇒ Sn

They are not in the same group neither the same period. Se is located at the top and right side compared to Sn, so Sn is the larger atom.

S8 +O2 = SO8

Given 80 mols of product, find the amount of each reactant in mols.

Answers

Answer:

10 moles of S₈

320 moles O₂

Explanation:

S₈ +O₂ → SO₈

The balanced equation is:

S₈ + 32O₂ → 8SO₈

Now we can convert moles of SO₈ (the product) into moles of each reactant, using the stoichiometric coefficients of the balanced reaction:

80 mol SO₈ * [tex]\frac{1molS_8}{8molSO_8}[/tex] = 10 mol S₈80 mol SO₈ * [tex]\frac{32molO_2}{8molSO_8}[/tex] = 320 mol O₂

In order for 80 moles of SO₈ to be produced, 10 moles of S₈ need to react with 320 moles of O₂.

Complete each nuclear reaction equation.

Superscript 14 subscript 7 upper N plus superscript 4 subscript 2 upper H e right arrow superscript question mark subscript 8 upper O plus superscript 1 subscript question upper H.

Nitrogen transmutes to form an isotope of oxygen. The superscript for oxygen is?

The subscript for hydrogen is?

Superscript 59 subscript question mark upper C o plus superscript 1 subscript 0 n right arrow superscript 60 subscript 27 upper C o.

Cobalt-59 accepts a neutron to form a new isotope. The subscript for cobalt is?

Answers

Nitrogen transmutes to form an isotope of oxygen. The superscript for oxygen is 17

The subscript for hydrogen is 1

Cobalt-59 accepts a neutron to form a new isotope. The subscript for cobalt is 27

Answer:

Oxygen = 17

Hydrogen = 1

Cobalt = 27

Explanation:

Sarah is running a race and is almost to the finish line. In the last 5 seconds, her velocity changes from 2m/s to 4m/s. What is her average acceleration during the last 5 seconds of the race?

Answers

Answer:

[tex]\boxed {\boxed {\sf a= \frac {2}{5} \ or \ 0.4 \ m/s^2}}[/tex]

Explanation:

Acceleration is found by dividing the change in velocity by the time. The formula is:

[tex]a= \frac {v_f-v_i}{t}[/tex]

where [tex]v_f[/tex] is the final velocity, [tex]v_i[/tex] is the initial or starting velocity, and [tex]t[/tex] is the time.

Her velocity changes from 2 meters per second to 4 meters per second in the 5 seconds. Therefore:

[tex]v_f= 4 \ m/s \\v_i= 2 \ m/s \\t=5 \ s[/tex]

Substitute the values into the formula.

[tex]a= \frac { 4 \ m/s- 2 \ m/s}{5 \ s}[/tex]

Solve the numerator and subtract.

[tex]a= \frac { 2 \ m/s}{5 \ s}[/tex]

Divide.

[tex]a= \frac{2}{5} \ m/s/s= \frac{2}{5} \ m/s^2[/tex]

This can also be written as a decimal.

[tex]a=0.4 \ m/s^2[/tex]

Her average acceleration during the last 5 seconds of the race is 2/5 or 0.4 meters per square second.

Answer:

Solution :-

Here

Initial velocity = 2 m/s

Final velocity = 4 m/s

Time = 5 sec

v = u + at

4 = 2 + a(5)

4 - 2 = a(5)

2 = 5a

2/5 = a

Hence, acceleration is 2/5 m/s²

what is the Ka of a 0.0592 M solution of hydrofluoric acid (HF) with a pH of 6.90

Answers

Answer:

2.7*10^-13

coefficient= 2.7

exponent= -13

Explanation:

Answer: 2.7 x 10^-13

Explanation:

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Susan has potatoes, salad, chicken, corn, and cheesecake; Tracy has potatoes, salad, chicken, milk, and cheesecake; Robert has steak, potatoes, chicken, corn, and cheesecake; Zach has potatoes, salad, chicken, corn, and cheesecake; and Dave has steak, salad, corn, milk, and cheesecake. Afterward all of them become sick from something they ate. What food caused the sickness? Here is an expression 3.2 evaluate the expression when t is 4 middle school math Write a C++ function with the following signature: void readAndConvert() The function takes no parameters and returns no value. Instead, it reads its input from std::cin and writes its output to std::cout. Both the input and output are information describing a sequence of stock trades, albeit in different formats. Input format The input will be formatted according to the following specification. 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One example input that follows that format is as follows, though your function would need to work on any input that follows the specification, not just the one example. BOO Forever Boo Enterprises 100 50.00 barzxfq. 200 60.75 hhpncstvz 150 7.90 cjjm 175 100.15 fryzyt Output format Your function's output is a reorganization of the information from the input, which you would write in the following format. The first line of output would contain the description of the stock, followed by a space, followed by the symbol surrounded by parentheses. Each subsequent line of output describes one of the trades from the input, in the following format: o The confirmation number, followed by a colon and a space, followed by the integer number of dollars spent in the order (i.e., the number of shares times the price per share, always rounding to the floor of the number). The correct output for the example input above is as follows. Forever Boo Enterprises (BOO) barzxfq: 5000 hhpncstvz: 12150 cjjm: 1185 fryzyt: 17526 It is irrelevant whether your program prints all of the output only after reading the input, or whether it prints the output while it reads input; this is your choice. The only requirement is that your output meets the formatting requirements. I WILL MARK BRAINLIEST! NO LINKS OR IMAGES.Conducting a survey best fits which step of the statistical process? Form a question that can be answered by data.Design and implement a plan that collects data.Analyze the data using graphical and numerical methods.Interpret and compare the data. Solve for the following byFACTORING:x2 + 11x + 28 = 0 I am not sure how to solve this. I have tried many times. PLS HELP, WILL GIVE BRAINLIEST!!!A piece of clay with a mass of 350 g is dropped to the floor from a height of 1.5 m (A). Calculate the KE and PE of the clay ata. (A = 1.5 m). b. (B = 70 cm), andc. (C = 0 m, just before hitting the ground). d. 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