Question

A student working in the laboratory produces 6.81 grams of calcium oxide, CaO, from 20.7 grams of calcium

carbonate, CaCO3, according to the reaction CaCO3 → CaO + CO2. Calculate the theoretical yield and
the percent yield for the reaction. Show and/or explain your work.

Answer 1

CaC

O

3

--------> CaO + C

O

2

20.7 g 6.81g +

As per the law of Conservation of mass , in any chemical reaction, the total mass of products is equal to the total mass of the reactants.

mass of C

O

2

+ mass of CaO is equal to the mass of CaC

O

3

.

mass of C

O

2

+ 6.81g = 20.7g

mass of C

O

2

= 20.7g- 6.81g = 13.89g

% yield of a Product Z = mass of product Z x 100 / mass of reactant

% yield of Product C

O

2

= 13.89 x 100 / 20.7 = 67. 10%

% yield of Product CaO = 6.81g x 100 /20.7 = 32.89%

Step-by-step explanation:

:)