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107. Solving a chemistry problem
Content: 19.rar 13,96 kB
Product description
Calculate the volume of a 0.1 mol/l solution of silver nitrate, which is consumed in the quantitative determination of a 5% alcohol iodine solution.
Compound:
Yoda - 50.0
Potassium iodide - 20.0
Purified water and ethanol 95% equally up to 1 liter.
According to the method of GF X (p. 355): 2 ml of the drug is placed in a 200 ml conical flask with a ground stopper and titrated with 0.1 mol/l sodium thiosulfate solution until it becomes colorless (without an indicator). 25 ml of water, 2 ml of diluted acetic acid, 5 drops of sodium eosinate are added to the resulting solution and titrated with 0.1 mol/l silver nitrate solution until the color of the precipitate changes from yellow to pink. A.m. iodine \u003d 126.9 g / mol, M.m. potassium iodide = 166.01 g/mol;
Additional information
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