Solubility - Test 2

1. Dialysis is the:

    A. separation of ions from colloidal suspensions
    B. coagulation of colloids by ions
    C. movement of colloidal particles in an electrical field
    D. effect of water on a lyophilic colloid

2. Hard water can be caused by the presence of:

    A. nitrate ions
    B. sodium ions
    C. magnesium ions
    D. potassium ions

3. Which procedure is most likely to increase the solubility of nearly all solids?

    A. Stirring
    B. Pulverizing the solid
    C. Heating the solution
    D. Increasing the pressure.

4. Silver sulfate is a compound whose water solution may be:

    A. dilute and saturated
    B. dilute and concentrated
    C. concentrated and saturated
    D. concentrated and unsaturated

5. Tinctures always contain the solvent:

    A. water
    B. iodine
    C. alcohol
    D. glycerine

6. A solution process is endothermic. Which will increase the solubility of solute in solvent?

    A. Heating the solution
    B. Stirring the solution
    C. Grinding the solute into a fine powder
    D. Cooling the solution

7. Of the following solvents, the one most likely to dissolve an ionic solute is:

    A. carbon tetrachloride
    B. methanol
    C. pentane
    D. butyl ether

8. Which organic compound is very soluble in water?

    A. Benzene
    B. Ether
    C. Ethyl alcohol
    D. Carbon tetrachloride

9. A precipitate forms when an aqueous solution of potassium iodide is added to aqueous:

    A. sodium sulfate
    B. lead nitrate
    C. calcium perchlorate
    D. barium hydroxide

10. When clay is mixed with water the clay particles are:

    A. dissolved
    B. suspended
    C. emulsified
    D. miscible

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