Q: What is the net ionic equation for the reaction between aqueous solutions of $$\text{Pb(NO}_3)_2$$ and $$\text{KI}$$?

$$\text{Pb}^{2+} (aq) + 2 \text{I}^- (aq) \rightarrow \text{PbI}_2 (s)$$

Q: Which of the following is a strong electrolyte?

$$\text{NaCl} ($$sodium chloride)

Q: What is the balanced net ionic equation for the reaction between $$\text{Cr}_2(\text{SO}_4)_3 (aq) $$and $$(\text{NH}_4)_2\text{CO}_3 (aq) $$that forms a precipitate?

$$2 \text{Cr}^{3+} (aq) + 3 \text{CO}_3$$^{2-}$$ (aq) \rightarrow \text{Cr}_2(\text{CO}_3)_3 (s)$$

Question 1

Which of the following best explains why a sodium chloride solution conducts electricity, but a sucrose solution does not?

Accepted Answer

Sodium chloride forms ions in solution, while sucrose remains as intact molecules.

Question 2

Which of the following compounds is predicted to be insoluble in water according to the solubility guidelines?

Accepted Answer

$$	ext{BaSO}_4$$

Question 3

What is the net ionic equation for the reaction between aqueous solutions of $$	ext{Pb(NO}_3)_2$$ and $$	ext{KI}$$?

Accepted Answer

$$	ext{Pb}^{2+} (aq) + 2 	ext{I}^- (aq) ightarrow 	ext{PbI}_2 (s)$$

Question 4

A solution is prepared by dissolving 21.0 g of NaF in enough water to make 500. mL of solution. What is the molarity of the solution? ($$	ext{Molar mass of NaF} = 42.0\ 	ext{g/mol})$$

Accepted Answer

$$1.00\ 	ext{M}$$

Question 5

Which of the following is a strong electrolyte?

Accepted Answer

$$	ext{NaCl} ($$sodium chloride)

Question 6

Which of the following best describes the role of water molecules when an ionic compound dissolves?

Accepted Answer

Water molecules surround and stabilize the separated ions, preventing them from recombining.

Question 7

What is the total ion concentration in a $$1.0\ 	ext{M}$$ solution of $$	ext{Na}_2	ext{SO}_4$$?

Accepted Answer

$$3.0\ 	ext{M ions}$$

Question 8

Which of the following acids is classified as a strong acid?

Accepted Answer

$$	ext{HNO}_3$$

Question 9

A student mixes $$50.0\ 	ext{mL} of$$ $$0.500\ 	ext{M}$$ $$	ext{KCl}$$ with $$25.0\ 	ext{mL} of$$ $$0.100\ 	ext{M}$$ $$	ext{K}_3	ext{PO}_4. $$What is the final concentration of $$	ext{K}^+$$ ions in the mixture?

Accepted Answer

$$0.430\ 	ext{M}$$

Question 10

Which of the following compounds will form a precipitate when mixed with a solution of $$	ext{AgNO}_3$$?

Accepted Answer

$$	ext{NaCl}$$

Question 11

Which of the following best describes a neutralization reaction?

Accepted Answer

A reaction in which an acid and a base react to form water and a salt.

Question 12

How many liters of $$0.500\ 	ext{M}$$ $$	ext{HCl}$$ are needed to react completely with $$0.100\ 	ext{mol} of$$ $$	ext{Pb(NO}_3)_2 to $$form $$	ext{PbCl}_2$$?

Accepted Answer

$$0.400\ 	ext{L}$$

Question 13

Which of the following is a nonelectrolyte?

Accepted Answer

$$	ext{CH}_3	ext{OH}$$

Question 14

Which reagent could be used to distinguish between $$	ext{KCl}$$ and $$	ext{BaCl}_2 in $$solution by forming a precipitate with only one of them?

Accepted Answer

$$	ext{Li}_2	ext{SO}_4$$

Question 15

Which of the following best describes the process of dilution?

Accepted Answer

Adding solvent to a solution to decrease its concentration.

Question 16

What is the balanced net ionic equation for the reaction between $$	ext{Cr}_2(	ext{SO}_4)_3 (aq) $$and $$(	ext{NH}_4)_2	ext{CO}_3 (aq) $$that forms a precipitate?

Accepted Answer

$$2 	ext{Cr}^{3+} (aq) + 3 	ext{CO}_3$$^{2-}$$ (aq) ightarrow 	ext{Cr}_2(	ext{CO}_3)_3 (s)$$

Question 17

Which of the following statements about strong and weak electrolytes is correct?

Accepted Answer

Strong electrolytes exist almost entirely as ions in solution.

Question 18

A solution contains $$0.030\ 	ext{M}$$ $$	ext{K}^+$$ ions. What is the molar concentration of the potassium carbonate solution, $$	ext{K}_2	ext{CO}_3$$?

Accepted Answer

$$0.015\ 	ext{M}$$

Question 19

Which gas is produced when $$	ext{Na}_2	ext{SO}_3$$ reacts with $$	ext{HCl}$$?

Accepted Answer

$$	ext{SO}_2$$

Reactions in Aqueous Solution: Electrolytes, Precipitation, and Solution Stoichiometry

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