Question 1

Which of the following best describes a precipitation reaction?

Accepted Answer

A reaction in which two solutions are mixed and an insoluble solid forms.

Question 2

When aqueous solutions of KI and Pb(NO$$_3$$)$$_2$$ are mixed, which compound forms as a precipitate?

Accepted Answer

$$\mathrm{$$PbI_2$$}$$

Question 3

According to solubility rules, which of the following ions will always produce soluble compounds in water?

Accepted Answer

$$\mathrm{NO_3$^-}$$

Question 4

Which of the following is a correct molecular equation for the reaction between aqueous HCl and KOH?

Accepted Answer

$$\mathrm{HCl(aq) + KOH(aq) \rightarrow H_2O(l) + KCl(aq)}$$

Question 5

Which of the following is a spectator ion in the complete ionic equation for the reaction between HCl(aq) and KOH(aq)?

Accepted Answer

$$\mathrm{K^+}$$

Question 6

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

Accepted Answer

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

Question 7

Which of the following combinations will NOT result in a precipitation reaction?

Accepted Answer

Mixing Na$$_2SO$_4(aq) $$and LiNO$$_3(aq)$$

Question 8

Which of the following is the correct net ionic equation for the reaction between acetic acid (HC$$_2H$_3O$_2) $$and KOH(aq)?

Accepted Answer

$$\mathrm{HC_2H_3O_2(aq) + OH^-(aq) \rightarrow H_2O(l) + C_2H_3O_2^-(aq)}$$

Question 9

A student mixes solutions of Na$$_2CO$_3(aq) $$and NiCl$$_2(aq). $$Which product will precipitate, if any?

Accepted Answer

$$\mathrm{$$NiCO_3$$(s)}$$

Question 10

Which of the following is true about strong acids in aqueous solution?

Accepted Answer

They completely ionize in water.

Question 11

Which of the following is a correct molecular equation for the reaction between aqueous HI and Ba(OH)$$_2(aq$$)?

Accepted Answer

$$\mathrm{2HI(aq) + Ba(OH)_2(aq) \rightarrow 2H_2O(l) + $$BaI_2$$(aq)}$$

Question 12

Which of the following is the correct net ionic equation for the reaction between HCHO$$_2(aq) ($$formic acid, a weak acid) and NaOH(aq)?

Accepted Answer

$$\mathrm{$$HCHO_2$$(aq) + OH^-(aq) \rightarrow H_2O(l) + $$CHO_2$$^-(aq)}$$

Question 13

During an acid-base titration, what is the equivalence point?

Accepted Answer

The point at which the number of moles of acid equals the number of moles of base added.

Question 14

A 20.00 mL sample of H$$_2SO$_4$$ solution of unknown concentration requires 22.87 mL of 0.158 M KOH to reach the equivalence point. What is the concentration of H$$_2SO$_4$$? (Use $$\mathrm{H_2SO_4 + 2KOH \rightarrow 2H_2O + K_2SO_4})$$

Accepted Answer

$$\mathrm{0.0905\ M}$$

Question 15

Which of the following is a polyprotic acid?

Accepted Answer

$$\mathrm{H_2SO_4}$$

Question 16

Which of the following is the correct complete ionic equation for the reaction between SrCl$$_2(aq) $$and Li$$_2PO$_4(aq$$)?

Accepted Answer

$$\mathrm{Sr$$^{2+}$$(aq) + 2Cl^-(aq) + 2Li^+(aq) + PO_4$^{3-}(aq) \rightarrow Sr_3$(PO_4$)_2(s) + 2Li^+(aq) + 2Cl^-(aq)}$$

Question 17

Which of the following is NOT a strong base?

Accepted Answer

$$\mathrm{NH_3$}$$

Question 18

Which of the following is the correct net ionic equation for the reaction between HBr(aq) and LiOH(aq)?

Accepted Answer

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

Precipitation, Ionic Equations, and Acid-Base Chemistry

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