Question 1

Which of the following compounds will form a precipitate when mixed with an aqueous solution of silver nitrate ($$\mathrm{$$AgNO_3$$}$$)?

Accepted Answer

$$\mathrm{NaCl}$$

Question 2

A student mixes $$50.0\ \mathrm{mL} of$$ $$0.200\ \mathrm{M}\ \mathrm{HCl}$$ with $$25.0\ \mathrm{mL} of$$ $$0.400\ \mathrm{M}\ \mathrm{NaOH}. $$What is the limiting reactant, and what is the final solution after the reaction is complete?

Accepted Answer

HCl is limiting; the solution is basic.

Question 3

Which of the following best describes the difference between a strong acid and a concentrated acid?

Accepted Answer

A strong acid completely ionizes in water, while a concentrated acid has a large amount of acid per unit volume.

Question 4

What is the net ionic equation for the reaction between aqueous solutions of $$\mathrm{Na_2SO_4}$$ and $$\mathrm{$$BaCl_2$$}$$?

Accepted Answer

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

Question 5

A $$100.0\ \mathrm{mL}$$ sample of $$0.500\ \mathrm{M}$$ $$\mathrm{NaOH} is $$diluted to $$250.0\ \mathrm{mL}. $$What is the final concentration?

Accepted Answer

$$0.200\ \mathrm{M}$$

Question 6

A gas sample occupies $$2.00\ \mathrm{L} at$$ $$1.00\ \mathrm{atm}$$ and $$300\ \mathrm{K}. If $$the pressure is doubled and the temperature is increased to $$600\ \mathrm{K}$$, what is the new volume?

Accepted Answer

$$2.00\ \mathrm{L}$$

Question 7

Which of the following statements about the kinetic molecular theory of gases is correct?

Accepted Answer

Gas particles move randomly and collisions are elastic, conserving total kinetic energy.

Question 8

A $$5.00\ \mathrm{g}$$ sample of an unknown gas occupies $$2.50\ \mathrm{L} at$$ $$1.00\ \mathrm{atm}$$ and $$27.0^\circ\mathrm{C}. $$What is the molar mass of the gas? ($$R = 0.0821\ \mathrm{L\ atm\ $$mol^{-1}$$\ K$$^{-1}$$})$$

Accepted Answer

$$48.9\ \mathrm{g\ $$mol^{-1}$$}$$

Question 9

Which of the following changes will increase the density of a gas, assuming the amount of gas remains constant?

Accepted Answer

Decreasing the temperature at constant pressure.

Question 10

A $$0.250\ \mathrm{mol}$$ sample of $$\mathrm{O_2$} is $$collected at $$25.0^\circ\mathrm{C}$$ and $$1.00\ \mathrm{atm}. $$What is the volume of the gas? ($$R = 0.0821\ \mathrm{L\ atm\ $$mol^{-1}$$\ K$$^{-1}$$})$$

Accepted Answer

$$6.15\ \mathrm{L}$$

Question 11

Which of the following is a correct application of Graham's law of effusion?

Accepted Answer

A lighter gas effuses faster than a heavier gas at the same temperature.

Question 12

A $$1.00\ \mathrm{L}$$ container holds $$0.0400\ \mathrm{mol} of a $$gas at $$300\ \mathrm{K}. $$What is the pressure in atm? ($$R = 0.0821\ \mathrm{L\ atm\ $$mol^{-1}$$\ K$$^{-1}$$})$$

Accepted Answer

$$0.985\ \mathrm{atm}$$

Question 13

Which correction in the van der Waals equation accounts for the finite size of gas particles?

Accepted Answer

The $$b$$ term, which subtracts from the volume.

Question 14

A $$25.0\ \mathrm{mL}$$ sample of $$0.200\ \mathrm{M}\ \mathrm{H_2SO_4} is $$titrated with $$0.100\ \mathrm{M}\ \mathrm{NaOH}. $$What volume of $$\mathrm{NaOH} is $$required for complete neutralization?

Accepted Answer

$$100.0\ \mathrm{mL}$$

Question 15

Which of the following ions is a spectator ion in the reaction between $$\mathrm{Na_2SO_4}$$ and $$\mathrm{$$BaCl_2$$}$$?

Accepted Answer

$$\mathrm{Na^+}$$

Question 16

A $$250.0\ \mathrm{mL}$$ solution is prepared by mixing $$100.0\ \mathrm{mL} of$$ $$0.400\ \mathrm{M}$$ $$\mathrm{NaCl}$$ and $$150.0\ \mathrm{mL} of$$ $$0.200\ \mathrm{M}$$ $$\mathrm{NaCl}. $$What is the final concentration?

Accepted Answer

$$0.280\ \mathrm{M}$$

Question 17

Which of the following is the correct oxidation number for sulfur in the sulfate ion ($$\mathrm{SO_4$^{2-}}$$)?

Accepted Answer

+6

Question 18

A sample of methane ($$\mathrm{CH_4$}) is $$burned in excess oxygen. If $$2.00\ \mathrm{L} of$$ $$\mathrm{CH_4$} is $$reacted at STP, what volume of $$\mathrm{CO_2$} is $$produced at STP?

Accepted Answer

$$2.00\ \mathrm{L}$$

Question 19

Which of the following best explains why Celsius cannot be used directly in gas law calculations?

Accepted Answer

Gas law relationships require absolute temperature, which is measured in kelvin.

General Chemistry II: Solutions, Reactions in Aqueous Solution, and Gases – Study Guide

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