Calculating Percentage Yield
Most of the time, when you do carry out a chemical reaction, you get less than you expect. The rest of it has been lost in some way perhaps due to spillages or losses when chemicals are transferred.
Suppose you work out that 10g of A will give 500g of the product, but you only get 400g…?
The percentage yield is (400/500) x 100 = 80%
A general formula would be: (mass produced/expected mass to be produced) x 100
| Endothermic | Heat energy is taken in
Breaking of bonds |
∆H = + N kJ mol-1 |