Preparation of 0.1M mercuric nitrate

Preparation of 0.1M mercuric nitrate

 

Molecular Formula:  Hg(NO3)2

Molecular weight: 324.60

 

Preparation

:

32.46 g in 1000 mL

Dissolve about 35 g of mercuric nitrate in a mixture of 5 mL of nitric acid and 500 mL of water, and dilute with water to 1000 mL.

Standardization

:


Transfer an accurately measured volume of about 20 mL of the solution to a conical flask, and add 2 mL of nitric acid and 2 mL of ferric ammonium sulfate TS. Cool to below 20 , and titrate with 0.1  N ammonium thiocyanate VS to the first appearance of a permanent brownish color.

Calculation

:

M

=

ml NH4SCN x N NH4SCN

mL Hg(NO3)2

Reference

:

USP

 

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