IOM 2020, Блиц — Задача 38

The Blitz-contest of IOM-2020

Условие

Anhydrous salt $X$ is a white powder, which gives a white precipitate when it gets into water, but easily dissolves in dilute nitric acid without gas evolution. On strong heating, $X$ decomposes with the release of brown gas, leaving no solid residue. When solution $X$ is exposed to a solution of potassium iodide, a red precipitate is formed, which dissolves in the excess of the reagent to form a pale yellow solution. Determine $X$. Write down its molar mass (in g/mol) rounded to the nearest integer.

Отговори

Решение

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Оригинал в Архива: iom-2020-blitz-tasks.pdf · официални решения: iom-2020-blitz-answers.pdf