Question

Which formula can be used to calculate the actual yield?

(Percent yield × theoretical yield) ÷ 100
(Percent yield ÷ theoretical yield) × 100
(Theoretical yield ÷ percent yield) × 100
(Theoretical yield × amount of reactants) ÷ 100

Answer 1

Answer : The correct option is,
`\frac{(\text{Percent yield}* \text{Theoretical yield})}{100}`

Explanation :

The formula used for the percent yield will be :

`\text{Percent yield}=\frac{\text{Actual yield}}{\text{Theoretical yield}}* 100`

or,

`\text{Actual yield}=\frac{(\text{Percent yield}* \text{Theoretical yield})}{100}`

For example : If we are given that the percentage yield of a sample is 94.92% and the theoretical yield is 83.475 g. Now calculate the actual yield of the sample.

By using formula we get the value of actual yield.

`\text{Actual yield}=((94.92* 83.475))/(100)=79.23g`

Thus, the actual yield is, 79.23 g.

Hence, the formula used to calculate the actual yield can be,
`\frac{(\text{Percent yield}* \text{Theoretical yield})}{100}`

Answer 2

(Percent yield × theoretical yield) ÷ 100.

Step-by-step explanation:

∵ percent yield of the reaction = [(actual yield)/(theoretical yield)] x 100.

∴ actual yield = [(percent yield of the reaction) x (theoretical yield)]/100.

So the right choice is: (Percent yield × theoretical yield) ÷ 100 .