Q: What is the net ionic equation for the reaction between aqueous solutions of Na3PO4 and CaCl2?

$$3\text{Ca}^{2+} (aq) + 2\text{PO}_4$$^{3-}$$ (aq) \rightarrow \text{Ca}_3(\text{PO}_4)_2 (s)$$

Q: Which of the following is the correct net ionic equation for the reaction between HCl and NaOH?

$$\text{H}^+ (aq) + \text{OH}^- (aq) \rightarrow \text{H}_2\text{O} (l)$$

Q: Which of the following reactions is a redox reaction?

$$\text{Zn} (s) + \text{CuSO}_4 (aq) \rightarrow \text{ZnSO}_4 (aq) + \text{Cu} (s)$$

Question 1

Which of the following statements best describes a strong electrolyte?

Accepted Answer

A substance that dissolves in water to give a solution that conducts electricity well because it completely ionizes.

Question 2

Which compound will form a precipitate when mixed with a solution of Na2SO4, according to the solubility guidelines?

Accepted Answer

BaCl2

Question 3

What is the net ionic equation for the reaction between aqueous solutions of Na3PO4 and CaCl2?

Accepted Answer

$$3	ext{Ca}^{2+} (aq) + 2	ext{PO}_4$$^{3-}$$ (aq) ightarrow 	ext{Ca}_3(	ext{PO}_4)_2 (s)$$

Question 4

Which of the following is a weak acid?

Accepted Answer

HF

Question 5

A solution is prepared by dissolving 222 grams of CaCl2 in enough water to make 500 mL of solution. What is the molarity of the solution? (Molar mass of CaCl2 = 111 g/mol)

Accepted Answer

$$2.0\ 	ext{M}$$

Question 6

Which of the following best describes the role of the oxidizing agent in a redox reaction?

Accepted Answer

It gains electrons and is reduced.

Question 7

What is the oxidation number of sulfur in $$	ext{SO}_3$$?

Accepted Answer

$$+6$$

Question 8

Which of the following metals will react with aqueous CuSO4 to produce copper metal, based on the activity series?

Accepted Answer

Zinc

Question 9

How many grams of NaOH are present in 150 mL of a 0.20 M NaOH solution? (Molar mass of NaOH = 40.0 g/mol)

Accepted Answer

$$1.2\ 	ext{g}$$

Question 10

If 20.00 mL of 3.000 M NaOH are required to neutralize 10.00 mL of HNO3, what is the molarity of the HNO3 solution?

Accepted Answer

$$1.50\ 	ext{M}$$

Question 11

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

Accepted Answer

BaSO4

Question 12

What is the concentration of $$	ext{Ba}^{2+}$$ ions in a 0.5 M BaCl2 solution?

Accepted Answer

$$0.5\ 	ext{M}$$

Question 13

Which of the following is the correct net ionic equation for the reaction between HCl and NaOH?

Accepted Answer

$$	ext{H}^+ (aq) + 	ext{OH}^- (aq) ightarrow 	ext{H}_2	ext{O} (l)$$

Question 14

How many milliliters of a 2.0 M NaOH solution are needed to provide 0.30 moles of NaOH?

Accepted Answer

$$150\ 	ext{mL}$$

Question 15

Which of the following is a strong base?

Accepted Answer

Ba(OH)2

Question 16

If 50 mL of a 6 M NaOH solution are diluted to a final volume of 100 mL, what is the new molarity?

Accepted Answer

$$3.0\ 	ext{M}$$

Question 17

Which of the following reactions is a redox reaction?

Accepted Answer

$$	ext{Zn} (s) + 	ext{CuSO}_4 (aq) ightarrow 	ext{ZnSO}_4 (aq) + 	ext{Cu} (s)$$

Question 18

Which of the following best describes a nonelectrolyte?

Accepted Answer

A substance that dissolves in water to give a solution that does not conduct electricity.

Question 19

What is the oxidation number of nitrogen in $$	ext{NO}_3^-$$?

Accepted Answer

$$+5$$

Reactions in Aqueous Solutions: Electrolytes, Precipitation, Acids & Bases, and Redox

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