Mass Percent Calculate the mass percent of Calcium Chloride in each of the following solutions
a) 5.00g of CaCl2 in 95.0 g of water
b) 1.00g of Calcium Chloride in 19.0 g of water
c) 15.0 g of Calcium Chloride in 285 g of water
d) 2.0 mg of CaCl2 in 0.0380 g of water
Part 2
Calculate the mass in grams of NaCl present in each of the following solutions
a) 11.5 g of 6.25% NaCl solution
b) 6.25 g of 11.5 % Nacl solution
c) 54.3 g of 0.91% NaCl solution
d) 452 g of 12.3% NaCl solution

a. the law of proportion states the combination of 2 atoms in a specific ratio to produce multiple compounds such as the given statement of question ‘1st compound contains 88.8 % cu ’ indicates 88.8 g of cu is present along with 11.2 g oxygen in 100 g of compound whereas the statement ‘2st compound contains 79.9 % cu ’ indicates 79.9 g of cu is present along with 20.1 g oxygen in 100 g of compound

1st compound contains 88.8 g cu

for cu

m = 63 g /mol

atomic % = 88.8 /63 = 1.42

for o

m = 16 g /mol

atomic % = 11.2 /16 = 0.7

b. the emperical formula of 1st compound is

cu1.4o0.7

cu2o