Question

Why NaCl is being used as a standard for limit test of chloride?

Why Dilute Nitric Acid is added to perform limit Test?

What is the limit of presence of chloride as an impurity in an analytical sample?​

Answer 1

Answer:

(1) ANS -Limit test of chloride is based on the reaction of soluble chloride with silver nitrate in presence of dilute nitric acid to form silver chloride, which appears as solid particles (Opalescence) in the solution.

(2) ANS -Reasons: Nitric acid is added in the limit test of chloride to make solution acidic and helps silver chloride precipitate to make solution turbid at the end of process.

(3) ANS -open sidebar

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Question From class 11 Chapter MOLE CONCEPT

On analysing an impure sample of sodium chloride, the percentage of chlorine was found to be 45.5. What is the percentage of pure sodium chloride in the sample ?

Solution :

Molecular mass of pure NaCl = Atomic mass of Na + Atomic mass of Cl <br>

u <br> Percentage of chlorine in pure NaCl

<br> Now, if chlorine is 60.6 parts, NaCl = 100 parts <br> if chlorine is 45.5 parts, NaCl

<br> Thus, percentage of pure NaCl = 75 %

Explanation:

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