ion 16 of 32 Map Sapling Learning (a) How many grams of CaCl2 are needed to make
ID: 556059 • Letter: I
Question
ion 16 of 32 Map Sapling Learning (a) How many grams of CaCl2 are needed to make 507.6 g of a solution that is 29.0% (m/m) calcium chloride in water? Note that mass is not technically the same thing as weight, but (m/m) has the same meaning as (w/w). Number g CaCI, How many grams of water are needed to make this solution? Number g H2O (b) What is the volume percent % (v/v) of an alcohol solution made by dissolving 131 mL of isopropyl alcohol in 765 mL of water? (Assume that volumes are additive. Number % (v/v) (c) The mass of solute per 100 mL of solution is abbreviated as %(rw).(The abbreviation % (w/v) is also common.) How many grams of sucrose are needed to make 635 mL of a 39.0% (w/v) sucrose solution? Number g sucrose O Previous Give Up & View Solution e Check Answer 0 Next Hint about us careers privacy policy terms of use contact us helpExplanation / Answer
a)
get mass of CaCl2
mass = % * mass soln = 29/100*507.6 = 147.204 g of CaCl2 required
mas of H2O = 507.6-147.204 = 360.396 g of H2O
b)
%v/v = volume IPropyl/ Total V
% v/v = 131 / (131+765) * 100
%v/v = 14.6205%
c)
mass of scurose = % * V = 39/100 * 635 = 247.65 g of sucorse required
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