sulphur burns in oxygen to give sulphur dioxide. if 16 g of sulphur dioxide burns in x cc. of oxygen, calculate the amount of potassium nitrate which must be heated to produce x cc of oxygen.
Asked by drashtichauhan75 | 21st Mar, 2019, 07:35: PM
Expert Answer:
The reaction for burning of sulphur is,
We know,
S = 32, K = 39 , N = 14, O = 16
Moles of S reacted =
0.5 mol of S needs 0.5 mol of Oxygen,
To create confusion, x cc is mentioned in the question, which has no significant use.
So we know that Sulphur burns in 0.5 mol Oxygen.
The thermal decomposition of Potassium nitrate :
2 mols of KNO3 gives 1 mol of O2
0.5 mol of O2 will be produced by 1 mol of KNO3
1mol of KNO3 = 101 g
Therefore the amount of KNO3 required to produce oxygen is 101 g.
Answered by Varsha | 21st Mar, 2019, 09:03: PM
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