Question

when 10 gram of sulphur is burnt in 10 gram of oxygen 20 gram of Sulphur dioxide is produced find the mass of the Sulphur Dioxide formed by burning 20 gram of sulphur in 30 gram of oxygen answer is not 50 gram​

Answer 1

Answer:

Given:

Chemical reaction:

S + O2-----> SO2

32g 32g 64g

Here ratio of S:O2 masses are 1:1

In given problem :

10g of sulphur reacts with 10g of oxygen to produce 20gm of sulphur dioxide.

Masses are in ratio 1: 1

But if 20g of sulphur reacts with 30g of sulphur then SO2= ?

Here if we see sulphur is acting as limiting reagent which limits the formation of SO2.

HENCE,

20g of sulphur reacts with 20g of oxygen to produce 40gms of SO2 and 10gm of oxygen is left without reacting.

In above given problem , law of constant proportion is followed.

The postulate of Dalton's atomic theory which governs above problem is " the elements consist of atoms having fixed mass and that number and kind of atoms of each element in a given compound is fixed

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