$$M = \frac{0.1\text{ mol}}{0.5\text{ L}} = 0.2\text{ M}$$

$$V_1$$ = \frac{M_2V_2}{$$M_1$$} = \frac{0.50 \times 2.00}{10} = 0.10\text{ L}$$

$$M_2$$ = \frac{M_1V_1}{$$V_2$$} = \frac{1.0 \times 100}{500} = 0.20\text{ M}$$

$$M = \frac{\text{amount\ of\ solute\ (mol)}}{\text{volume\ of\ solution\ (L)}}$$

Question 1

Which of the following best describes a concentrated solution?

Accepted Answer

A solution containing a large amount of solute relative to the solvent.

Question 2

What is the molarity of a solution prepared by dissolving 5.8 g of NaCl (molar mass = 58 g/mol) in enough water to make 500 mL of solution?

Accepted Answer

$$M = \frac{0.1	ext{ mol}}{0.5	ext{ L}} = 0.2	ext{ M}$$

Question 3

Which equation is used to calculate the final concentration after diluting a stock solution?

Accepted Answer

$$M_1V_1 = M_2V_2$$

Question 4

A lab procedure requires 2.00 L of a 0.50 M solution. If you have a stock solution of 10 M, what volume of stock solution should you use?

Accepted Answer

$$V_1$$ = \frac{M_2V_2}{$$M_1$$} = \frac{0.50 	imes 2.00}{10} = 0.10	ext{ L}$$

Question 5

Which of the following is a strong electrolyte?

Accepted Answer

NaCl dissolved in water

Question 6

Which statement best describes a weak electrolyte?

Accepted Answer

A substance that partially dissociates into ions in water and conducts electricity weakly.

Question 7

Which of the following is NOT a property of a non-electrolyte solution?

Accepted Answer

It conducts electricity.

Question 8

What is the net ionic equation for the reaction between HCl(aq) and NaOH(aq)?

Accepted Answer

$$\mathrm{H^+ (aq) + OH^- (aq) \rightarrow H_2O (l)}$$

Question 9

Which of the following best describes an oxidation reaction?

Accepted Answer

A process in which an atom loses electrons.

Question 10

What is the oxidation state of sulfur in SO$$_4$$^{2-}$$?

Accepted Answer

+6

Question 11

Which rule is used to assign the oxidation state of oxygen in most compounds?

Accepted Answer

Oxygen is assigned an oxidation state of $$-2.$$

Question 12

A solution is prepared by diluting 100 mL of a 1.0 M stock solution to a final volume of 500 mL. What is the final concentration?

Accepted Answer

$$M_2$$ = \frac{M_1V_1}{$$V_2$$} = \frac{1.0 	imes 100}{500} = 0.20	ext{ M}$$

Question 13

Which of the following is a redox reaction?

Accepted Answer

$$\mathrm{Zn (s) + Cu$$^{2+}$$ (aq) \rightarrow Zn$$^{2+}$$ (aq) + Cu (s)}$$

Question 14

If 0.2 mol of Na$$_3PO$_4$$ reacts with excess NaOH, how many moles of Na$$_3PO$_4$$ are present in the final solution?

Accepted Answer

0.2 mol

Question 15

Which of the following is the correct formula for calculating molarity?

Accepted Answer

$$M = \frac{	ext{amount\ of\ solute\ (mol)}}{	ext{volume\ of\ solution\ (L)}}$$

Question 16

Which of the following statements about acids and bases is correct?

Accepted Answer

An acid produces $$\mathrm{H^+}$$ ions in aqueous solution.

Question 17

Which of the following is the correct oxidation state for hydrogen in most compounds?

Accepted Answer

+1

Question 18

A student mixes 0.1 mol of HCl with 0.1 mol of NaOH in water. What is the main product formed?

Accepted Answer

$$\mathrm{H_2O}$$

Question 19

Which of the following is the correct oxidation state for fluorine in compounds?

Accepted Answer

-1

Solution Concentration and Molarity in General Chemistry

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