Single Choice

In organic compounds, Sulphur is estimated as:

A$$BaSO_{4}$$
Correct Answer
B$$BaCl_{2}$$
C$$Ba_{3}(PO_{4})_{2}$$
D$$H_{2}SO_{4}$$

Solution

Estimation of sulphur
Sulphur is also estimated by Carius method.

Principle: When an organic compound containing sulphur is heated with fuming nitric acid, sulphur is oxidised to sulphuric acid. This is precipiated as barium sulphate by adding barium chloride solution. From the amount of barium sulphate, percentage of sulphure can be calculated.
$$S+HNO_3(fuming) \xrightarrow{heat} H_2SO_4$$
$$H_2SO_4+BaCl_2\rightarrow BaSO_4+2HCl$$
Calculations: Mass of organic compound $$=Wg$$
Mass of barium sulphate $$W_1g$$
$$BaSO_4(233g)\equiv S (32 g)$$
$$233g$$ of barium sulphate contains sulphur $$=32g$$
$$W_1g$$ of barium sulphate contains sulphur $$=(32/233)\times W_1g$$
Percentage of sulphur $$=(32/233)\times (W_1/W) \times 100$$

SIMILAR QUESTIONS

Organic Chemistry

In an estimation of S by Carius method 0.2175g of the compound gave 0.5825g of $$BaSO_{4}$$. Percentage of S is :

Organic Chemistry

0.32g of organic compound in Carius method gave 0.233g of $$ BaSO_{4}$$. The percentage of $$S$$ in the organic compound is:

Organic Chemistry

An organic compound containing sulphur is estimated by Carius method in which fuming $$HNO_3$$ is used to convert S into :

Organic Chemistry

Fill in the blanks : In Carius method for sulphur and phosphorus, sulphur is estimated as ............. and phophorus is estimated as ..............

Organic Chemistry

In the estimation of sulphur, organic compound on treating with conc. $$HNO_3$$ is converted to

Organic Chemistry

How much sulphur is present in organic compound if on analysis $$0.53\ gm$$ of this compound gives $$1.158\ gm$$ of $$BaSO_{4}$$?

Organic Chemistry

In Carius method for the quantitative estimation of sulphur. it is estimated by__________.

Organic Chemistry

The violet colour obtained during the test of sulphur by Lassaigne's test is due to the formation of:

Organic Chemistry

Sulphur is estimated by carius method as barium sulphate.

Organic Chemistry

A red solution is obtained when ferric chloride solution is added to sodium extract. It indicates both nitrogen and sulphur are present in the organic compound.

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