21) The solution resulting from the addition of a nonvo a. a higher freezing poi

Question

21) The solution resulting from the addition of a nonvo a. a higher freezing point than pure solvent b. a lower boiling point than pure solvent c. both a lower freezing a hi d. both a low e. more than one of the choices (a through d) above is cormect solvent the addition of a nonvolatile solute to ng point and a higher boiling point than pure solvent a lower freezing point and lower boiling point than pure solvent 22) How much water must be added to 15.40 mls of ethanol to have a solution that is 22.60 % (v/v) ethanol? (YOU MUST SHOW YOUR WORK ON ATTACHED SHEETS) PLACE ANSWER HERE 23) A solution of concentration 7.6%(mm) contains 7.6 g of solute per liter of solution. a. TRUE b. FALSE 24) Which of the following solutions would be hypotonic relative to red blood cells? a. isotonic saline solution b. 0.20 M saline solution

Explanation / Answer

21)
Boiling point always increases and this is known as elevation in boiling point
Freezing point always decreases and this is known as depression in freezing point

Answer: c

22)
(v/v)% = volume of ethanol * 100 / volume of solution
(v/v)% = volume of ethanol * 100 / (volume of ethanol + volume of water)
22.60 = 15.40 * 100 / (15.40 + volume of water)
15.40 + volume of water = 68.14
volume of water = 52.74 ml
Answer: 52.74 mL

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