What is the mass in grams of "CaCl"_2" in a "3 M CaCl"_2" solution?

1 Answer
Meave60
Aug 24, 2017

"300 g CaCl"_2"

Explanation:

"Molarity"=("mol solute")/("liter of solution")

A 3 M solution of calcium chloride contains 3 moles of the solute "CaCl"_2 in one liter of solution. To convert 3 mol "CaCl"_2 to mass in grams, multiply the given moles by the molar mass: "110.978 g/mol".

3color(red)cancel(color(black)("mol CaCl"_2))xx(110.978"g CaCl"_2)/(1color(red)cancel(color(black)("mol CaCl"_2)))="300 g CaCl"_2" (rounded to one significant figure due to 3 mol)

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