Answer to Question #78653 in General Chemistry for nora

Question

The number of grams of CaCl2 in 70.0 mL of 2.50% (w/v) CaCl2 solution

Answer 1

The number of grams of CaCl2 in 70.0 mL of 2.50% (w/v) CaCl2 solution
Answer:
w/v concentration stands for the number of grams of solute in 100 mL of solution
We know that concentration is 2.50 % = 2.5 g of CaCl2 in each 100 mL, therefore in 70.0 mL there is (2.5 x 70)/100 = 1.75 g of CaCl2