6) A solution with only two components must always be a liqu a. TRUE b. FALSE 7)

Question

6) A solution with only two components must always be a liqu a. TRUE b. FALSE 7) A stock aqueous solution n contains 503.29 grams of NaCI per 1.000 liter. 81.00 mls. of of the stock solution. What is the molarity of the dilution? grams o water is added to 10.00 mLs stock solution. (YOU MUST SHOW YOUR WORK ON ATTACHED SHEETS) PLACE ANSWER HERE 8) Reduction is the process whereby a reactant in a reaction loses one or more electrons. a. TRUE b. FALSE 9) The solubi lity rule "like dissolves like is not adequate for predicting solubilities when the solute is a(n) a. molecular solid b. ionic solicd c. liquid d. gas e. covalent solid 10) The selectivity of a semi-permeable membrane is based on polarity differences among molecules a TRUE b. FALSE 11) The solubility of a solute is the maximum amount of solute that will dissolve in a given amount of solvent at a specific temperature (and also a specific pressure, if a the solute is a gas) a. TRUE b. FALSE 12) Boiling points are the basis for the solubility rule "like dissolves like." a. TRUE b. FALSE 13) Increased temperature increases gas solubility, while increased pressure decreases gas solubility a. TRUE b. FALSE

Explanation / Answer

4.

(c) Thresold energy

(5)

(e) a and c

(6)

(b) False

(7)

Moles of NaCl = mass / molar mass = 503.29 / 58.5 = 8.60 mol

Using dilution formula,

M1 V1 = M2 V2

8.60 * 10.0 = M2 * 91.0

M2 = final concentraion of NaCl soution = 0.945 M

(8) FALSE
(

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