EVERYDAY SCIENCE

SCIENCE

CHEMISTRY

Question [CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
In a reaction, the amount of product was calculated to be 10.0 g. In the lab, the amount of product obtained was 8.2 g. Find the percent yield.
A
8.2%
B
82%
C
122%
D
0.82%
Explanation: 

Detailed explanation-1: -Substitute the respective values in equation (2) given above. Therefore, the percent yield of the nitrogen gas is 103.25% which is not possible because the actual yield can’t be greater than the theoretical yield.

Detailed explanation-2: -The amount of a product that is formed when the limiting reactant is fully consumed in a reaction is known as the theoretical yield.

Detailed explanation-3: -To express the efficiency of a reaction, you can calculate the percent yield using this formula: %yield = (actual yield/theoretical yield) x 100.

Detailed explanation-4: -Typically, percent yields are understandably less than 100% because of the reasons indicated earlier. However, percent yields greater than 100% are possible if the measured product of the reaction contains impurities that cause its mass to be greater than it actually would be if the product was pure.

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