Question 1

When the equation $$\mathrm{N_2$ + H_2$ \rightarrow NH_3$} is $$balanced, what are the coefficients for $$\mathrm{N_2$}$$, $$\mathrm{H_2$}$$, and $$\mathrm{NH_3$}$$, respectively?

Accepted Answer

1, 3, 2

Question 2

Balance the following chemical equation: $$\mathrm{CH_4$ + O_2$ \rightarrow CO_2$ + H_2O}. $$Which set of coefficients correctly balances the equation?

Accepted Answer

1, 2, 1, 2

Question 3

A solution is prepared by mixing 20 grams of sugar with 100 grams of water. Which of the following statements is correct?

Accepted Answer

Water is the solvent and sugar is the solute.

Question 4

When an ionic compound such as NaCl(s) dissolves in water, the process of surrounding each ion with solvent molecules is called:

Accepted Answer

solvation

Question 5

Which of the following compounds would form a non-electrolyte solution when dissolved in water?

Accepted Answer

SO$$_2$$

Question 6

Which statement best describes an electrolyte?

Accepted Answer

A substance that dissociates into ions and conducts electricity in solution.

Question 7

A nurse prepares an IV solution by dissolving NaCl in water. In this solution, NaCl is the:

Accepted Answer

solute

Question 8

Which property is NOT characteristic of a true solution?

Accepted Answer

It scatters light.

Question 9

Calculate the molarity of a solution prepared by dissolving 5.0 mol NaOH in 2.0 L of solution.

Accepted Answer

$$2.5\ \mathrm{M}$$

Question 10

A student prepares a 200 mL solution containing 0.30 mol HCl. What is the molarity of the solution?

Accepted Answer

$$1.5\ \mathrm{M}$$

Question 11

What is the concentration of a solution that contains 4.50 mol of NaF dissolved in 7.50 L of solution?

Accepted Answer

$$0.600\ \mathrm{M}$$

Question 12

How many moles of NH$$_3$$ are present in 1.50 L of a 0.500 M NH$$_3$$ solution?

Accepted Answer

$$0.750$$ mol

Question 13

Calculate the number of moles in 500 mL of 0.400 M HCl.

Accepted Answer

$$0.200$$ mol

Question 14

A sports drink contains dissolved electrolytes. Which of the following best explains why it can conduct electricity?

Accepted Answer

It contains ions that move freely in solution.

Question 15

Which of the following is a correct description of an aqueous solution?

Accepted Answer

A solution where the solvent is water.

Question 16

A patient receives an IV solution containing 0.9% NaCl. Why is it important that the solution is isotonic to blood?

Accepted Answer

To prevent cells from shrinking or swelling due to osmosis.

Question 17

Which of the following best describes the process shown when NaCl dissolves in water?

Accepted Answer

NaCl dissociates into Na$$^+$$ and Cl$$^-$$ ions, each surrounded by water molecules.

Question 18

Which of the following is NOT a property of a solution?

Accepted Answer

It contains visible particles.

Question 19

A student wants to prepare 1.0 L of a 0.25 M NaCl solution. How many moles of NaCl are needed?

Accepted Answer

$$0.25$$ mol

Question 20

Which of the following best explains why covalent compounds like sugar do not conduct electricity when dissolved in water?

Accepted Answer

They do not dissociate into ions.

Chapter 9: Solutions – Key Concepts and Calculations

Study Guide - Practice Questions

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