Question 1

Which of the following best describes a double-replacement reaction?

Accepted Answer

A reaction where two ionic compounds in aqueous solution exchange anions, often forming an insoluble product.

Question 2

Given the reaction: $$\mathrm{$$BaCl_2$$(aq) + K_2CrO_4(aq) \rightarrow $$BaCrO_4$$(s) + 2KCl(aq)}$$, which compound is the precipitate?

Accepted Answer

$$\mathrm{$$BaCrO_4$$}$$

Question 3

Which of the following ionic compounds is expected to be insoluble in water according to the solubility rules?

Accepted Answer

$$\mathrm{AgCl}$$

Question 4

A student mixes aqueous solutions of sodium chloride and lithium nitrate. What is the expected result?

Accepted Answer

No reaction occurs because all products are soluble.

Question 5

Which of the following best summarizes the solubility rules for ionic compounds in water?

Accepted Answer

All Group I metal ions, ammonium, nitrate, and acetate compounds are soluble.

Question 6

Which of the following is a neutralization reaction?

Accepted Answer

$$\mathrm{HCl(aq) + NaOH(aq) \rightarrow NaCl(aq) + H_2O(l)}$$

Question 7

Which of the following combinations will result in the formation of a precipitate?

Accepted Answer

$$\mathrm{$$AgNO_3$$(aq) + NaCl(aq)}$$

Question 8

A hospital uses a double-replacement reaction to remove toxic lead(II) ions from water by adding sodium sulfate. What is the precipitate formed?

Accepted Answer

$$\mathrm{$$PbSO_4$$}$$

Question 9

Which of the following reactions will NOT result in a precipitate?

Accepted Answer

$$\mathrm{NaCl(aq) + $$KNO_3$$(aq)}$$

Question 10

Which of the following best explains why $$\mathrm{$$KNO_3$$} is $$always soluble in water?

Accepted Answer

Because nitrate ions are always soluble, regardless of the cation.

Question 11

A chemist mixes $$\mathrm{$$CaCl_2$$(aq)}$$ and $$\mathrm{Na_2CO_3(aq)}. $$What is the balanced equation and the precipitate formed?

Accepted Answer

$$\mathrm{$$CaCl_2$$(aq) + Na_2CO_3(aq) \rightarrow 2NaCl(aq) + $$CaCO_3$$(s)}$$; precipitate: $$\mathrm{$$CaCO_3$$}$$

Question 12

Which of the following is NOT a characteristic of a neutralization reaction?

Accepted Answer

It always produces a gas.

Question 13

Which of the following pairs will NOT react to form a precipitate, based on solubility rules?

Accepted Answer

$$\mathrm{$$KNO_3$$(aq)}$$ and $$\mathrm{NaCl(aq)}$$

Question 14

Which of the following best describes the driving force for a double-replacement reaction?

Accepted Answer

Formation of an insoluble solid (precipitate), water, or a gas.

Question 15

A solution contains $$\mathrm{NH_4NO_3}. $$What can you conclude about its solubility?

Accepted Answer

It is soluble because both ammonium and nitrate ions are always soluble.

Question 16

Which of the following reactions is an example of a double-replacement reaction that also serves as a neutralization reaction?

Accepted Answer

$$\mathrm{H_2SO_4(aq) + 2NaOH(aq) \rightarrow Na_2SO_4(aq) + 2H_2O(l)}$$

Question 17

Which of the following best explains why $$\mathrm{$$AgNO_3$$}$$ and $$\mathrm{NaCl}$$ react to form a precipitate?

Accepted Answer

Because $$\mathrm{AgCl} is $$insoluble in water.

Question 18

A chemist wants to separate calcium ions from a solution. Which reagent should be added to form an insoluble precipitate?

Accepted Answer

$$\mathrm{Na_2CO_3}$$

Question 19

Which of the following is a correct net ionic equation for the reaction between $$\mathrm{$$AgNO_3$$(aq)}$$ and $$\mathrm{NaCl(aq)}$$?

Accepted Answer

$$\mathrm{Ag^+(aq) + Cl^-(aq) \rightarrow AgCl(s)}$$

Question 20

Which of the following statements about solubility rules is FALSE?

Accepted Answer

All chlorides are insoluble in water.

Double Replacement and Neutralization Reactions: Solubility Rules in General Chemistry

Guida di studio - Domande di pratica