How many Faraday is needed to deposit 0.2 g of Calcium (Ca) from CaCl2 solution using electrolysis process.

Answers

Answer 1

Answer:

0.01 faraday

Explanation:

We'll begin by writing the balanced equation. This is illustrated below:

CaCl₂ (aq) —> Ca²⁺ (aq) + 2Cl¯ (aq)

Ca²⁺ (aq) + 2e —> Ca

Molar mass of Ca = 40 g/mol

Mass of Ca from the balanced equation = 1 × 40 = 40 g

1 mole of electron (e) = 1 faraday

2 moles of electrons (e) = 2 × 1 faraday

2 moles of electrons (e) = 2 faraday

From the balanced equation above,

40 g of Ca was deposited by 2 faraday.

Therefore, 0.2 g of Ca will be deposited by = (0.2 × 2)/40 = 0.01 faraday.

Thus, 0.01 faraday is needed for the reaction.


Related Questions

What does a positive H look like on a potential energy diagram?

Answers

Answer:

D because i did this last week and got it right.

A positive H indicates that the potential energy of products is higher than the potential energy of reactants.

What is a potential energy diagram?

A potential energy diagram is a diagram which shows the energy content of reactants and products as well as the energy changes that occur in a reaction.

A positive H in a reaction indicates that the reaction is endothermic and that products have a higher potential energy than reactants.

Therefore, a positive H indicates that tje potential energy of products is higher than the potential energy of reactants.

Learn more about potential energy of a reaction at: https://brainly.com/question/12798587

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which star is mostly like Earth's sun? A)Blue Giant B) Red Giant C) Main sequence D) White Dwarf?​

Answers

Answer:

C) main sequence

Explanation:

Currently, the Sun is a main sequence star. In roughly 5 billion years from now, the Sun will transition into a red giant.

how many moles of sodium phosphate are required to make 7.5 moles of sodium nitrate in 2Na3PO4+3Be(NO3)=6NanO3+Be3(PO4)2

Answers

Answer:

2.5 moles of sodium phosphate

Explanation:

3 Pb(NO3)2 + 2 Na3PO4 → Pb3(PO4)2 + 6 NaNO3

6 (moles in the reaction)- 7.5(moles  in the task)

2 (moles in the reaction)- x (moles in answer) ⇒6x = 2*7.5 ⇒ x = 15/6=2.5 (moles)

How does the rate of a chemical reaction change if the concentration of both reactants increases 4 times?

2NO + O2 → 2 NO2

Answers

Answer: The rate will increase 32 times if the concentration of both reactants increases 4 times

Explanation:

Rate law says that rate of a reaction is directly proportional to the concentration of the reactants each raised to a stoichiometric coefficient determined experimentally called as order.

For the reaction : [tex]2NO+O_2\rightarrow 2NO_2[/tex]  [tex]rate=k[NO]^2[O_2]^1[/tex]  

k= rate constant

order with respect to [tex]NO_2[/tex] = 2

order with respect to [tex]O_2[/tex] = 1

Thus on increasing the concentration of reactants 4 times :

[tex]rate'=k[4\times NO]^2[4\times O_2]^1[/tex]

[tex]rate'=k\times 8\times 4\times [NO]^2\times [O_2]^1[/tex]

[tex]rate'=32\times rate[/tex]

Thus rate will increase 32 times if the concentration of both reactants increases 4 times

4. Calculate the heat energy needed to heat 25.0 g of water from 13.0°C to 18.0°C. Use chart above for specific heat of water. Use units and show all work.​

Answers

Answer: I go search some information

Explanation:I come back with a answer

What kind of rock can be broken
down to make sand?

Answers

Answer:

sandstone

Explanation:

Sandstone is a mineral rock made of small particles.

Yes what the other person said lol

A material in which electrons are able to move easily or freely is a(n)
A none of these
В electric field
C insulator
D conductor​

Answers

Answer:b

Explanation:

Which of the following bonds is classified as a polar bond?

A K-CI

B Br-Br

C Si-F

D S-O



WILL MARK BRAINLIST

Answers

Answer:

the answer is b

Explanation:

the answer is b

Compound of KCl has a polar bond as there is a electronegativity difference between potassium and chlorine atoms.

What is a compound?

Compound is defined as a chemical substance made up of identical molecules containing atoms from more than one type of chemical element.

Molecule consisting atoms of only one element is not called compound.It is transformed into new substances during chemical reactions. There are four major types of compounds depending on chemical bonding present in them.They are:

1)Molecular compounds where in atoms are joined by covalent bonds.

2) ionic compounds where atoms are joined by ionic bond.

3)Inter-metallic compounds where atoms are held by metallic bonds

4) co-ordination complexes where atoms are held by co-ordinate bonds.

They have a unique chemical structure held together by chemical bonds Compounds have different properties as those of elements because when a compound is formed the properties of the substance are totally altered.

Learn more about compounds,here:

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How many grams are there in 2.30x10^24 atoms of silver?

Answers

Answer:

107.8682 grams.

Explanation:

During
the
school
year,
1.3
x
102
students
participate
in
football,
and
.5
x
102
participate
in
soccer.

What
is
the
total
number
of
students
that
participate
in
football

Answers

If I understood question correctly,
football 1.3 • 102=132.6
Answer is 132 students participate in football.

I have a bowling ball hanging from a chain in my room. What two forces are acting on the bowling
ball?

Answers

Answer:

Gravity and the chain is holding it up not sure what it is called. Also if you want free points go to my answers and look for a friday nigt funkin rp answer but anwer if you want to rp and if you know what it is

Explanation:

Answer:

Kinetic & Potential Energy

Explanation:

Kinetic Energy: Energy which a body possesses by virtue of being in motion.

Potential Energy: The energy possessed by a body by virtue of its position relative to others, stresses within itself, electric charge, and other factors

Hope this helps! Have a good day/or night!

P.S: Sorry if I'm wrong I tried my best. Best wishes!!!

number of elments in hcooh

Answers

3 elements are present in HCOOH - hydrogen, oxygen, and carbon.

H2CO: → H2O + CO2
Answer the following question about the equation above.
1. How many atoms of Hydrogen are in the reactant?
2. How many atoms of Carbon are in the reactant?
3. How many atoms of Oxygen are in the reactant?
4. How many atoms of Hydrogen are in the product?
5. How many atoms of Oxygen are in the product?
6. How many atoms of Carbon are in the product?
7. Does the number of atoms of each element on the reactant side match that of the product side?

Answers

Answer:

1) 2

2) 1

3)1

4) 2

5)3

6)1

7)yes except Oxygen

Si Hecho Dos Cubos de Hielo En Un Vaso Con Agua Señalo Donde Quedo El Nivel Del Agua, Luego A Pasar El Tiempo Dejo Que Se Derritan Los Cubos De Hielo El Nivel Del Agua Aumenta??

Answers

Answer:

Ver explicacion

Explanation:

Técnicamente, cuando el hielo se derrite, ocupa aproximadamente el mismo volumen de agua que es igual a la masa de agua desplazada antes de que el hielo se derrita. Esto es posible solo cuando se ignora el cambio en la densidad del agua.

Sin embargo, si tenemos en cuenta el ligero cambio en la densidad del agua, se puede demostrar que el volumen de hielo es mayor que el del agua líquida porque el agua se expande cuando se congela.

Esto significa que el volumen de agua disminuye cuando el hielo se derrite.

What is the mass of an object with a net force of 10 N accelerating at 2 m/s^2??

Answers

Answer:

5kg

Explanation:

Force = Mass x acceleration

F = ma

m = F/a = 10N/2m/s^2

m = 10/2 = 5kg

The standard unit for mass = Kilogram

How to determine the relative rates of reactant disappearance and product appearance using reaction stoichiometry

Answers

Answer:

For example, the relative rate of a reaction at 20 seconds will be 1/20 or 0.05 s -1, while the average rate of reaction over the first 20 seconds will be the change in mass over that period, divided by the change in time.

Explanation:

Hope it helps u

FOLLOW MY ACCOUNT PLS PLS

What does this image represent?

A. Linear molecule with one domain
B. Linear molecule with two domains
C. Tetrahedral molecule with four domains
D. Trigonal planar molecule with three domains

Answers

Answer: A.

Explanation:

Answer:

A. Linear molecule with one domain.

Hope this helps! :)

Explanation:

A student weighs an empty flask and stopper and finds the mass to be 53.256 g. She then adds about 5 mL of an unknown liquid and heats the flask in a boiling water bath at 98.8°C. After all the liquid is vaporized, she removes the flask from the bath, stoppers it, and lets it cool. After it is cool, she momen- tarily removes the stopper, then replaces it and weighs the flask and condensed vapor, obtaining a mass of 53.780 g. The volume of the flask is known to be 231.1 mL. The absolute atmospheric pressure in the laboratory that day is 728 mm Hg. a. What was the pressure of the vapor in the flask in atm?

Answers

Answer:

a. The pressure in the flask open to the atmosphere during the vaporization of the unknown liquid is equal to the prevailing atmospheric pressure equivalent to 0.957734 atm

Explanation:

The mass of the empty flask and stopper, m = 53.256 g

The volume of the unknown liquid she adds = 5 mL

The temperature of the water in which she heats up the flask = 98.8 °C = 371.95 K

The mass of the flask and the condensed vapor = 53.780 g

The volume of the flask, V = 231.1 mL

The atmospheric pressure, P = 728 mm Hg

a. We note that the student stoppers the flask after all the liquid has evaporated. Therefore, given that the flask was open to the atmospheric pressure as the liquid evaporates, the pressure of the vapor in the flask is equal to the prevailing atmospheric pressure, or 728 mmHg

Using a calculator, 728 mm Hg is equivalent to 0.957734 atm.

The law of reflection states that the angle of incidence and the angle of reflection are always

Answers

Answer:

The law of reflection states that the angle of incidence and the angle of reflection are always equal.

Graduated cylinder‘s

Answers

The fourth option, the only thing changing is the container size. Not the mass or volume of the liquid

6th grade science Major grade plz help ASAP

Answers

Answer: An organism is part of a community

Which of the following uses electrical energy?
A washing machine
The sun
A plant
A cat

Answers

Answer:

★ B. A washing machine.

Explanation:

What's Electrical energy?

Electrical energy is energy derived from electric potential energy or kinetic energy. When used loosely, electrical energy refers to energy that has been converted from electric potential energy.

PLEASE HELP AND DONT YOU DARE GIVE ME THE LINK

The fact that animals are the only kingdom that has muscle tissue demonstrates a contrast between which of the
following?
animals and humans
animals and protozoans
animals and other living things
animals and insects

Answers

Answer:

animals and other living things

Explanation:

All living organisms have been classified and grouped into a hierarchical system of classification. Kingdom is the highest level in this system comprising of 6 other levels. However, there are different kingdoms that harbors different organisms. The kingdoms are: animalia, plantae, protista, monera, fungi etc.

However, among other kingdom of organisms, organisms in the Kingdom Animalia are the only ones that possesses muscle tissues etc. This shows a contrast between animals and other living things.

Which of the following terms describes the area where the Himalaya Mountains formed?


A.)Convergent Boundary

B.)Transform Boundary

C.)Divergent Boundary

B.)Subduction Zone

Answers

Answer:

Convergent Boundary describes the area where himalayan mountains formed.

no.of elements in KMnO4​

Answers

Answer:

3 three

Explanation:

potassium (K), manganese (Mn), and oxygen (O).

Answer:

3 different elements (7 in total as there are 4 oxygens (The answer is either one of these))

Explanation:

NEED ANSWERS NOWWWWW​

Answers

Answer:

Explanation:

Observation 1 is correct because the crystals are just turning into water. They can be frozen back.

In a titration, what is the significance of the endpoint?

Answers

Answer:

Explanation:

the addition of an indicator to the analyte solution helps us to visually spot the equivalence point in an acid-base titration. Endpoint: refers to the point at which the indicator changes color in an acid-base titration.


A scientist is designing a device that will kill harmful cells in the human body using high-energy waves. Which type of wave would be most effective
А
X-rays would be the best choice because they have a long wavelength and a low frequency
accomplishing this goal?
B
Radio waves would be the best choice because they have a long wavelength and a low frequency
Gamma rays would be the best choice because they have a short wavelength and a high frequency
D
Infrared waves would be the best choice because they have a short wavelength and a high frequency
C2021 Illuminate Education Inc.
Tin
Type here to search
O
BH

Answers

Answer:

gamma rays

Explanation:

gamma Ray's have the highest frequency

How many moles are in 8.3 x 10^23 molecules of H2O?

Answers

Answer:You multiply avogadro's number to what you were given.

8.30x10^23 * 6. 0221409x10^23

=1.357*10^25

Explanation:

in what order were the sun and earth created according to both the younger theory and the older theory

Answers

answer: the earth orbits around the sun for 365 while getting older to the young theory.

Answer:

The older theory was that the sun (and other planets) revolved around earth and the new theory is that the earth (and other planets) revolved around the sun.

Explanation:

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