Question

2.746g of a compound gave an analysis 1.94 of silver, 0.268g of sulphur and 0.538g of oxygen. Calculate the empirical formula of the compound.​

Answer 1

2.746g of a compound gave an analysis 1.94 of silver, 0.268g of sulphur and 0.538g of oxygen. Calculate the empirical formula of the compound.

Explanation:

Ag = 1.94 / 2.746 *  100 = 70.6%

S = 0.268 / 2.746 *  100 = 9.75%

O = 0.538/2.746 * 100  = 19.6%

To calculate empirical formula we proceed as follows

Ag    70.6   70.6/108  = 0.654     0.654/0.305 = 2

S    9.75   9.75/32 = 0.305          0.305/0.305  = 1

O  19.6    19.6/16    =1.22    1.22/0.305