In sulphur estimation, $0471 \,g$ of an organic compound gave $14439 \,g$ of barium sulphate The percentage of sulphur in the compound is ___(Nearest Integer) (Grven: Atomic mass Ba: $137 \,u , S : 32\, u , O : 16 \,u$ )
Correct Answer: 42
Solution and Explanation
1. Molar mass of BaSO$_4$:
\[ M = 137 + 32 + 64 = 233 \, \text{g/mol}. \]
2. Mass of sulphur in BaSO$_4$:
\[ \text{Mass of S} = \frac{32}{233} \times \text{mass of BaSO$_4$}. \]
3. Substituting the given mass of BaSO$_4$:
\[ \text{Mass of S} = \frac{32}{233} \times 1.4439 = 0.1984 \, \text{g}. \]
4. Percentage of sulphur:
\[ \% \text{S} = \frac{\text{Mass of S}}{\text{Mass of compound}} \times 100 = \frac{0.1984}{0.471} \times 100 = 42.10 \%. \]
Thus, the percentage of sulphur is \(42\%\). In sulphur estimation, the amount of sulphur is directly calculated from the mass of BaSO$_4$ formed, using stoichiometric relations.
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Concepts Used:
Organic Chemistry - Some Basic Principles and Techniques
Organic Chemistry is a subset of chemistry dealing with compounds of carbon. Therefore, we can say that Organic chemistry is the chemistry of carbon compounds and is 200-225 years old. Carbon forms bond with itself to form long chains of hydrocarbons, e.g.CH4, methane and CH3-CH3 ethane. Carbon has the ability to form carbon-carbon bonds quite elaborately. Polymers like polyethylene is a linear chain where hundreds of CH2 are linked together.
Read Also: Organic Compounds
Importance of Organic Chemistry:
Organic chemistry is applicable in a variety of areas including-
- Medicines: Example- Aspirin which is a headache medicine and Ibuprofen is a painkiller, both are organic compounds. Other examples include paracetamol.
- Food: Example- Starch which is a carbohydrate is an organic compound and a constituent of rice and other grains. It is the source of energy.
- Clothing: Example- Nylon, Polyester and Cotton are forms of organic compounds.
- Fuels: Examples- Gasoline, Petrol and Diesel are organic compounds used in the automobile industry at large.