Question

Calculate the mass I must weigh to prepare a solution of NaCl to a normality of 0.01N in 100 ml

Answer 1

For the calculation of normality the formula is given below:

Normality = (Wt. of a solute taken in a solvent in gram * 1000) / (Equivalent Wt. of that solute * Volume of the solution in ml)

Where the equivalent weight is a ratio of Molecular weight of solute to valency of that compound.

For NaCl equivalent weight is 58.5.

0.01 = (Wt. of a solute taken in a solvent in gram * 1000) / (58.5 * 100)

Wt. of a solute taken in a solvent in gram = 0.01 * 5.85 = 0.0585 gram

Wt. of a solute taken in a solvent in gram = 58.5 milligram.

Therefore, answer is 58.5 mg.

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