Chem U7/8 TEST

A student conducts an experiment to identify the pH of some common household substances. The data is recorded in this table.

Which substance would be classified as containing the highest concentration of hydroxide ions?

• ammonia

• lemon juice

• drain cleaner

• vinegar

An acid-base titration is represented by the chemical equation below.

CsOH (aq) + HBr (aq) → CsBr (aq) + H2O (l)

In the titration, 15.0 mL of CsOH solution is neutralized by 38.2 mL of 0.250 M HBr solution. What is the molarity of the CsOH solution?

• 0.0982M

• 10.2M

• 1.36M

• 0.637M

A student describes a liquid as feeling slippery. The student places red litmus paper into the liquid, and the paper turns blue. What can the student conclude from these observations?

• The substance is likely an acid.

• The substance is likely a metal.

• The substance is likely a nonmetal.

• The substance is likely a base.

A solution has a pOH of 12. Which best describes the solution?

• It has a pH of 12 and is an acid.

• It has a pH of 2 and is an acid.

• It has a pH of 12 and is a base.

• It has a pH of 2 and is a base.

What volume of 0.200M HCl will neutralize 10.0mL of 0.400M KOH?

• 40.0 mL

• 20.0 mL

• 8.00 mL

• 5.00 mL

Given the data table below, which substance is an acid?

• Substance W

• Substance Y

• Substance Z

• Substance X

Based on hydroxide ion concentration, which unknown substance would be an acid?

• Substance D, [OH-] = 1.0 x 10^-8 M

• Substance C, [OH-] = 1.0 x 10^-6 M

• Substance B, [OH-] = 1.0 x 10^-4 M

• Substance A,[OH-] = 1.0 x 10^-2 M

Heat is added to a solution to

• a. increase the solubility of a solid solute.

• b. increase the solubility of a gas solute.

• c. increase the miscibility of the solution

• d. increase the degree of saturation of the solution.

23.5g of NaCl is dissolved in enough water to make 0.683 L of solution.

a) What is the molarity (M) of the solution?

 

b) How many moles of NaCl are contained in 0.0100 L of the above NaCl solution?

 

c) What volume (L) of this NaCl solution would contain 0.200 moles of NaCl?

How much 0.05 M HCl solution can be made by diluting 250 mL of 10 M HCl?