Question

an inorganic salt gave the following percentage composition sodium 29.11 sulphur 40.51 and oxygen 30.38 calculate the empirical formula of the salt

Answer 1

Name of the element-

Sodium (Na)

Percentage composition-

29.11

Percent mass-

29.11/23 = 1.26

Simplest at ratio-

1

Simplest whole no. ratio-

2

Name of the element-

Sulphur (S)

Percentage composition-

40.51

Percent mass-

40.51/32 = 1.28

Simplest at ratio-

1

Simplest whole no. ratio-

2

Name of the element-

Oxygen (O)

Percentage composition-

30.38

Percent mass-

30.38/16 = 1.89

Simplest at ratio-

1.5

Simplest whole no. ratio-

3

EMPIRICAL FORMULA = Na2S2O3