# chem

How many grams of CaCl2 would be required to be added to water to prepare 1 Liter (1000ml) of a 1.72% (w/v) aqueous solution of CaCl2?

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1. 1.72% w/v means 1.72 g/100 mL soln.
So if 1.72 grams are needed for 100 mL, then 17.2 g would be needed to prepare 1000 mL.

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