IOM 2019, Блиц — Задача 58

OLYMPIAD OF METROPOLISES, Moscow, September 2, 2019 · 2 септември 2019 г.

Условие

Select all the methods that can be used to synthesize $BaSO_3$ (insoluble in water):

1. Heating of solid $BaSO_4$ with carbon

2. Dissolution of $H_2S$ in a $Na_2SO_4$ solution followed by addition of a few drops of $BaCl_2$

3. Bubbling of $SO_2$ through a $BaCl_2$ solution

4. Bubbling of $SO_2$ into a $Ba(OH)_2$ solution

(Multiple choice)

Решение

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Оригинал в Архива: blitz-en-all-task-final.pdf