Q: Which of the following is the correct formula for calculating the molarity ($$M) of a $$solution?

$$M = \dfrac{\text{moles of solute}}{\text{volume of solution in L}}$$

Question 1

Which of the following compounds is a strong base?

Accepted Answer

KOH

Question 2

In the reaction $$NH_3 + H_2O$$ \rightarrow $$NH_4^+ + OH$$^-$$, which species acts as a Brønsted-Lowry acid?

Accepted Answer

$$H_2O$$

Question 3

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

Accepted Answer

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

Question 4

A solution is prepared by mixing 100.0 mL of 0.200 M $$NaNO_3$$ and 100.0 mL of 0.100 M $$Na_2CO_3. $$What is the final concentration of $$Na^+$$ ions?

Accepted Answer

$$0.300\ \mathrm{M}$$

Question 5

Which of the following metals will react most vigorously with water at room temperature?

Accepted Answer

Potassium

Question 6

Which of the following is the correct balanced half-reaction for the reduction of $$Zn^{2+} to$$ $$Zn$$?

Accepted Answer

$$Zn^{2+}(aq) + 2e$$^- \rightarrow Zn(s)$$

Question 7

If 0.500 mol of $$Na_2SO_4 is $$dissolved in enough water to make 2.00 L of solution, what is the concentration of $$SO_4$$^{2-}$$ ions?

Accepted Answer

$$0.250\ \mathrm{M}$$

Question 8

A sample of gas at 1.00 atm and 250 mL is heated from 25°C to 80°C. If the pressure remains constant, what is the new volume?

Accepted Answer

$$0.28\ \mathrm{L}$$

Question 9

Which of the following salts is most likely to be insoluble in water?

Accepted Answer

$$AgCl$$

Question 10

Which of the following is the correct net ionic equation for the reaction of $$BaCl_2(aq$$)$$ with Na_2SO_4(aq$$)$$?

Accepted Answer

$$Ba^{2+}(aq$$) + $$SO_4$$^{2-}(aq) \rightarrow $$BaSO_4(s$$)$$

Question 11

Which of the following is the correct formula for calculating the molarity ($$M) of a $$solution?

Accepted Answer

$$M = \dfrac{	ext{moles of solute}}{	ext{volume of solution in L}}$$

Question 12

Which of the following is a redox reaction?

Accepted Answer

$$Zn(s) + 2HCl(aq) \rightarrow $$ZnCl_2$$(aq) + H_2$(g)$$

Question 13

Which of the following is the correct oxidation half-reaction for $$Fe^{2+} in $$acidic solution?

Accepted Answer

$$Fe^{2+}(aq$$) \rightarrow $$Fe^{3+}(aq) + e$$^-$$

Question 14

Which of the following is the correct net ionic equation for the reaction of $$HCl(aq)$$ with $$NaOH(aq)$$?

Accepted Answer

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

Question 15

Which of the following is the correct activity series order for metals from most reactive to least reactive in water?

Accepted Answer

Potassium \u003e Sodium \u003e Calcium \u003e Magnesium \u003e Copper

Question 16

A student recovers 6.088 g of $$CuCl_2$$ from a reaction that theoretically should produce 7.000 g. What is the percent yield?

Accepted Answer

$$87.0\%$$

Question 17

Which of the following is the correct balanced equation for the reaction of sodium metal with water?

Accepted Answer

$$2Na(s) + 2H_2O(l) \rightarrow 2NaOH(aq) + H_2$(g)$$

Question 18

Which of the following ions is always soluble in water according to solubility rules?

Accepted Answer

$$NO_3$$^-$$

General Chemistry II: Reactions in Aqueous Solution, Stoichiometry, and Solution Properties – Study Guide

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