Question 1

Which of the following compounds is a strong electrolyte when dissolved in water?

Accepted Answer

NaNO3

Question 2

Which statement best explains why water is a good solvent for ionic compounds?

Accepted Answer

Water is polar, allowing it to stabilize ions through electrostatic interactions.

Question 3

Which of the following acids is classified as a strong acid?

Accepted Answer

HNO3

Question 4

What is the net ionic equation for the reaction between Na2S(aq) and Pb(NO3)2(aq)?

Accepted Answer

$$\mathrm{S}^{2-}(aq) + \mathrm{Pb}^{2+}(aq) \rightarrow \mathrm{PbS}(s)$$

Question 5

Which of the following compounds is insoluble in water?

Accepted Answer

PbI2

Question 6

A student mixes solutions of Ba(NO3)2 and Na2SO4. What is the precipitate formed?

Accepted Answer

BaSO4

Question 7

Which of the following is a weak electrolyte?

Accepted Answer

CH3COOH

Question 8

Which of the following best describes a neutralization reaction?

Accepted Answer

An acid reacts with a base to produce a salt and water.

Question 9

What is the oxidation number of chlorine in the compound HClO4?

Accepted Answer

+7

Question 10

In the reaction $$\mathrm{Zn}(s) + \mathrm{CuSO}_4(aq) \rightarrow \mathrm{ZnSO}_4(aq) + \mathrm{Cu}(s)$$, which species is the reducing agent?

Accepted Answer

Zn

Question 11

Which of the following reactions will occur based on the activity series of metals?

Accepted Answer

$$\mathrm{Zn}(s) + \mathrm{CuCl}_2(aq) \rightarrow \mathrm{ZnCl}_2(aq) + \mathrm{Cu}(s)$$

Question 12

A solution is prepared by dissolving 50.0 g of glucose ($$\mathrm{C}_6\mathrm{H}_{12}\mathrm{O}_6) in $$enough water to make 2.00 L of solution. What is the molarity of the solution? (Molar mass of glucose = 180.2 g/mol)

Accepted Answer

$$0.278\ \mathrm{M}$$

Question 13

How many grams of $$\mathrm{K}_2\mathrm{Cr}_2\mathrm{O}_7 ($$molar mass = 294.2 g/mol) are required to prepare 250.0 mL of a 0.16 M solution?

Accepted Answer

$$11.8\ \mathrm{g}$$

Question 14

A student needs to prepare 1.00 L of 0.150 M HCl from a 1.20 M stock solution. What volume of stock solution is required?

Accepted Answer

$$0.125\ \mathrm{L}$$

Question 15

In a titration experiment, 25.49 mL of NaOH solution is required to neutralize 0.7137 g of KHP ($$\mathrm{KHC}_8\mathrm{H}_4\mathrm{O}_4$$, molar mass = 204.2 g/mol). What is the concentration of the NaOH solution?

Accepted Answer

$$0.137\ \mathrm{M}$$

Question 16

Which of the following is true about gravimetric analysis?

Accepted Answer

It is only applicable to reactions that go to completion.

Question 17

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

Accepted Answer

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

Question 18

Which of the following is a characteristic property of bases?

Accepted Answer

They feel slippery and turn red litmus paper blue.

Question 19

Which of the following best describes a redox reaction?

Accepted Answer

A reaction in which electrons are transferred between reactants.

Chapter 4: Chemical Reactions in Aqueous Solutions – Properties of Aqueous Solutions and Electrolytes

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