Question

5. A basic buffer solution can be prepared by using a

A) solution of sodium hydroxide.

B) solution of ammonia and ammonium chloride

C) a mixtureof of sodium hydroxide and hydrochloric acid

D) a mixture of acetic acid and sodium acetate.

6. Which is a diprotic acid?

A) Hydrochloric acid, HCl B) Sulfuric acid, H2SO4

C ) Phosphoric acid, H3PO4 D) Acetic acid,

7. What is the formula of the compound formed between calcium ion and bicarbonate ion?

A) CaSO4 B) Ca(HCO3)2 C) CaCO3 D) CaCO2

8. Adding solute to a solution increases each of the following except

A) molarity. B) boiling point. C) osmotic pressure. D) freezing point.

9. What will happen if temperature of a nitrogen gas cylinder is increased from 25.0 °C to 50.0 °C?

A) Volume of gas will increase. B) Number of moles of gas will increase.

C) Pressure of gas will increase. D) Nitrogen gas will convert to nitrogen dioxide

10. Water can be used to dissolve which type of compounds

A) only nonpolar compounds B) only polar compounds

C) only ionic compounds D) both ionic and polar compounds

11. Which element is most likely to have chemical properties similar to those of magnesius (atomic

number 12)?

A) Ar (atomic number 18) B) Ba (atomic number 20)

C) Sc (atomic number 21) D) Sodium (atomic number 11)

12. Which information is necessary to determine the molarity of a solution if the chemical formula of

the solute is known?

A) only the mass of solute dissolved

B) only the volume of solvent used

C) the molar mass of both the solute and the solvent used

D) the mass of solute dissolved and the final volume of the solution

Answer 1