101 Задачка по химии №010 187

82. To determine H2S, 50 cm3 of 0.01880 N iodine solution was added to 20 cm3 of solution. For titration of excess iodine, 10.00 ml of a 0.0194 N solution of sodium thiosulfate was used. How many grams of H2S are contained in 1 dm3 of the test solution?

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