If 12.5 grams of calcium is reacted with excess hydrogen chloride in a water solution according to the following chemical reaction, and the measured amount of 23.5 grams of calcium chloride is produced, what is the percent yield for the reaction? Use the balanced equation given below.

Ca (s) + 2HCl (aq) → CaCl2 (aq) + H2 (g)

Frist, calculate the theoretical yield, then calculate the percent yield. You must show all your work with calculations with a proper set up including:
a.how you find the molar mass of CaCl2, .
b.how you calculate the theoretical yield

Question

If 12.5 grams of calcium is reacted with excess hydrogen chloride in a water solution according to the following chemical reaction, and the measured amount of 23.5 grams of calcium chloride is produced, what is the percent yield for the reaction? Use the balanced equation given below. 

Ca (s) + 2HCl (aq) → CaCl2 (aq) + H2 (g) 

Frist, calculate the theoretical yield, then calculate the percent yield. You must show all your work with calculations with a proper set up including:
a.how you find the molar mass of CaCl2, .
b.how you calculate the theoretical yield

anonymous · Answer

First of all you need to know how much CaCl2 is generated by the reaction
40.08 g of Ca produce 110.98 g of CaCl2  (Ca=40.08 Cl=35.45 * 2 =  70.9)
So 12.5 g should produce 34.61 g approximately 
If 34.61 g of CaCl2 are produced the percentage yield should be 100% but you are given 23.5 so 
34.61=100%
23.5=X
X=67.90%