Question

12. Consider the following reaction sequence:
CaCl2(aq) + CO2(g) + H2O → CaCO3(s) + 2HCl(aq)
Cacoz(s) heat , CaO(s) + H2O(g).
If the percentage yield of the 1st step is 80% and
that of the 2nd step is 75%, then what is the
expected overall percentage yield for producing
CaO from CaCl,?
(1) 50%
(2) 70%
(3) 55%
(4) 60%​

Answer 1

Answer:

To calculate overall yeild of reaction like

A-->B-->C-->D

where,

AB=50%

BC=80%

CD=50%

OVERALL YEILD = (0.50 x 0.80 x 0.50) x 100 = 20%

use this concept and answer will be done

Answer 2

Answer:

(4) 60%​

Explanation:

Percentage yield of reaction 1 is 80% . It means that the formation of CaCO₃ is 80% of CaCl₂

Percentage yield of reaction 2 is 75% . It means that the formation of CaO is 75% of CaCO₃.

Thus, formation from CaCl₂ to CaO, the percentage yield is:

% yield = 0.8 × 0.75 × 100 = 60%

Option 4 is correct.