CHEM Fifth Six-Weeks Review

Which of the following explains why gasoline is insoluble (not soluble) in water? Select TWO correct answers.

• Gasoline is nonpolar, but water is polar.

• Gasoline is flammable, and water is not flammable.

• Water molecules are held together by polar covalent bonds.

• Water molecules are much smaller than molecules in gasoline.

• Gasoline is less dense than water.

When a solute dissolves in a solvent it creates a solution. Which factors affect the rate of dissolving? Select TWO correct answers.

• small surface area of solvent

• temperature of solvent

• applied pressure

• large surface area of solvent

• size of solute particles

Use solubility rules to determine the missing states of matter in the equation below. (NH4)2Cr2O7 (aq) + Ca(OH)2 (aq) -> 2 NH4OH (?) + CaCr2O7 (?) Which product is insoluble?

• (NH4)2Cr2O7

• Ca(OH)2

• NH4OH

• CaCr2O7

Which two factors must be considered when predicting whether two substances will dissolve in each other?

• number of bonds and size of the molecules

• number of bonds and molecular shape

• type of bonds and size of the molecules

• type of bonds and molecular shape

When calculating the molarity of a solution, what information is needed? Select TWO correct answers.

• number of moles of solvent

• number of moles of solute

• number of particles of solvent

• number of liters of solution

• atomic mass of solvent

Which unit listed below is used to measure solution concentration in chemistry?

• electronegativity

• molarity

• solubility

• viscosity

A student is titrating a NaOH solution. The student slips when turning the buret knob and adds 2.50 mL of HCl to the solution. The solution turns pink and remains that color. Based on the volume of HCl added, the student calculates the concentration of NaOH to be 0.116 M. Which of the following is the most likely value of the actual concentration of NaOH in the solution?

• 0.110

• 0.116

• 0.120

• 0.141

What is the molarity of a 250. mL H2SO4 solution that was made from a 20.0 mL of a 10.0 M stock solution?

• 0.800 M

• 1.25 M

• 125 M

• 500. M

Which equation can be used to calculate the dilution of a solution?

• a = bc

• c = λv

• PV = nRT

• M1V1 = M2V2

Which of the following compounds is a nonelectrolyte in solution?

• C6H12O6

• HC2H3O2

• Ca(OH)2

• Li3N