All categories

3 years ago

The following redox reaction is conducted with [Al3+] = 0.12 M and [Mn2+] = 1.5 M.

Chemistry

1 answer:

Ronch [10]3 years ago

6 0

Answer:

0.47V

Explanation:

2 Al(s) + 3 Mn2+(aq) → 2 Al3+(aq) + 3 Mn(s)

n= 6 ( six moles of electrons were transferred)

Q= [Red]/[Ox] but [Red]= 1.5M, [Ox] = 0.12 M

Q= 1.5/0.12= 12.5

From Nernst equation:

E= E°cell- 0.0592/n log Q

E°cell= 0.48 V

E= 0.48 - 0.0592/6 log (12.5)

E= 0.47V

You might be interested in

PLEASE HELP PLEASE HELP PLEASE HELP PLEASE HELP PLEASE HELP

vivado [14]

Answer:

not sure about it .I also need an answer

8 0

2 years ago

The chemical equation below shows the combustion of methane (CH4).

pishuonlain [190]

According to the chemical equation, the reaction ratio between O2 and CO2 is 2:1, which mean for every 2 moles of O2 reacted there is 1 mole of CO2 formed.

Use the molar mass and mass of O2 to find out the moles of O2: moles of O2 = mass of O2/molar mass of O2 = 8.94g/32.00g/mol = 0.2794 mole. Therefore, the moles of CO2 that formed is 0.2794moles/2 = 0.1397 mole

Use the moles and molar mass CO2 to find out the mass of CO2:
Mass of CO2 = moles of CO2 * molar mass of CO2 = 0.1397 mole * .44.01g/mole = 6.15 g.

So the answer is B 6.15g.

3 0

2 years ago

Read 2 more answers

What are the coeffients that balance the following skeletal equation?<br> CH4 + O2 + Cl2 ® HCI + CO

oee [108]

Answer:

CH4 ---> 2

CL2 ----> 4

HCL -----> 8

CO-------> 2

Explanation:

Equation

CH4 + O2 + Cl2 => HCI + CO

we have to balance it

On LHS atoms of oxygen is 2 while on RHS it is 1 atom so lets balance oxygen first

to balance oxygen on RHS we add 2 as coefficient to CO

CH4 + O2 + Cl2 => HCI + 2CO

___________________________________________________

On RHS atoms of Carbon is 2 while on RHS it is 1 atom so lets balance Carbon now

to balance Carbon on LHS we add 2 as coefficient to CH4

2CH4 + O2 + Cl2 => HCI + 2CO

___________________________________

On LHS atoms of hydrogen is 8 so lets balance hydrogen now

to balance hydrogen on RHS we add 8 as coefficient to HCL

2CH4 + O2 + Cl2 => 8HCI + 2CO

______________________________________________

On RHS atoms of Cl is 8 while on LHS atoms of Cl is 2.

To make no of atoms of Cl 8 on LHS we add 4 as coefficient

2CH4 + O2 + 4Cl2 => 8HCI + 2CO

Thus, coefficients are as given below

CH4 ---> 2

CL2 ----> 4

HCL -----> 8

CO-------> 2

8 0

2 years ago

mixtures, solubility, and Acid/Base Solutions lesson outline lesson 2 properties of solutions answer key

salantis [7]

In chemistry, mixtures, solubility, acid/base and solutions are all important to understanding volumetric analysis and chemical reactions.

<h3>What is a mixture?</h3>

A mixture is a any substance which consists of two or more constituents which are physically combined together.

Example of a mixture is bronze.

<h3>What is solubility?</h3>

Solubility of a solute in a given solvent is defined as the amount of solute that can be dissolved in that solvent at a particular temperature.

<h3>What are acids and bases?</h3>

An acid is a substance which produces hydrogen ions or protons as the only positive ions when dissolved in water.

Example of an acid is hydrochloric acid.

A base is a substance which reacts with an acid to produce salt and water only, thereby neutralizing the acid.

Example of a base is potassium hydroxide.

<h3>What are solutions?</h3>

Solutions are homogenous mixtures of a solute dissolved in a solvent.

Example of solutions are sugar solutions and saline water.

Therefore, mixtures, solubility, acid/base and solutions are all important to understanding volumetric analysis and reactions in chemistry.

Learn more about mixtures, solubility, acid/bases and solutions at: brainly.com/question/7314699

8 0

2 years ago

How many grams of ice at 0c could be melted by the additional of 0.400 kJ of heat

enot [183]

To solve this we will use the formula q=mc delta T. Q is heat, m is mass, c is specific heat and delta T is change in temperature. because it is a phase change problem, temperature does not apply. Also, we will use heat of fusion of water (344J/g) instead of specific heat. We will also convert 0.400 kJ to J, which becomes 400 J.

0<span>.400 kJ x (1000 J/1 kJ) = 400 J </span>

<span>400 J = (g) x (334 J/g) </span>

<span>g = 1.198

Because of sig figs, we will round to 1.20 grams (3 sig figs). The answer is 1.20 grams.</span>

3 0

3 years ago