$$M = \frac{\text{moles of solute}}{\text{liters of solution}}$$

Question 1

Which of the following best describes a concentrated solution?

Accepted Answer

A solution with a relatively large amount of solute compared to solvent.

Question 2

What is the molarity of a solution prepared by dissolving 29.2 g of NaCl (molar mass = 58.44 g/mol) in enough water to make 500.0 mL of solution?

Accepted Answer

$$0.500\ \mathrm{M}$$

Question 3

Which of the following equations correctly represents the relationship for molarity ($$M$$)?

Accepted Answer

$$M = \frac{	ext{moles of solute}}{	ext{liters of solution}}$$

Question 4

You have a 12.0 M stock solution of HCl. How many milliliters of this stock solution are needed to prepare 100.0 mL of 1.00 M HCl?

Accepted Answer

$$8.33\ \mathrm{mL}$$

Question 5

Which of the following substances is a strong electrolyte when dissolved in water?

Accepted Answer

NaCl

Question 6

Which of the following is NOT evidence that a chemical reaction has occurred?

Accepted Answer

Dissolving sugar in water

Question 7

According to the solubility rules, which of the following compounds is insoluble in water?

Accepted Answer

BaSO$$_4$$

Question 8

What is the net ionic equation for the reaction between aqueous solutions of magnesium nitrate and sodium chromate?

Accepted Answer

$$\mathrm{Mg$$^{2+}$$ (aq) + $$CrO_4$$^{2-} (aq) \rightarrow $$MgCrO_4$$ (s)}$$

Question 9

Which of the following best describes a nonelectrolyte?

Accepted Answer

A substance that dissolves in water but does not conduct electricity.

Question 10

Which of the following is a correct molecular equation for the reaction between potassium iodide and lead(II) nitrate?

Accepted Answer

$$2 \mathrm{KI} (aq) + \mathrm{Pb(NO_3$)_2} (aq) \rightarrow \mathrm{$$PbI_2$$} (s) + 2 \mathrm{$$KNO_3$$} (aq)$$

Question 11

Which of the following is a Brønsted-Lowry acid in the reaction $$\mathrm{NH_3$(aq) + H_2O(l) \rightarrow NH_4$^+(aq) + OH^-(aq)}$$?

Accepted Answer

$$\mathrm{H_2O}$$

Question 12

Which of the following is the correct net ionic equation for the neutralization of HCl with NaOH?

Accepted Answer

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

Question 13

A student mixes aqueous solutions of sodium sulfate and barium chloride. What is the precipitate formed?

Accepted Answer

BaSO$$_4$$

Question 14

Which of the following is the correct oxidation number for chromium in $$\mathrm{$$MgCrO_4$$}$$?

Accepted Answer

+6

Question 15

In the reaction $$\mathrm{Al (s) + $$CdCl_2$$ (aq) \rightarrow Cd (s) + $$AlCl_3$$ (aq)}$$, which species is oxidized?

Accepted Answer

Al

Question 16

Which of the following best describes a double displacement reaction?

Accepted Answer

Two aqueous compounds exchange ions to form two new compounds, one of which may be a precipitate.

Question 17

Which of the following is a correct balanced equation for the decomposition of calcium carbonate?

Accepted Answer

$$\mathrm{$$CaCO_3$$ (s) \rightarrow CaO (s) + CO_2$ (g)}$$

Question 18

A 1.500 M solution of SbF$$_3 is to be $$prepared using 75.00 mL of solution. How many grams of SbF$$_3 ($$molar mass = 178.76 g/mol) are needed?

Accepted Answer

$$20.1\ \mathrm{g}$$

Introduction to Solutions and Aqueous Reactions

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