IOM 2020, Блиц — Задача 12
The Blitz-contest of IOM-2020
Условие
An excess of is shaken with water. The resulting mixture is filtered, and the filtrate W is obtained. Two drops of dilute sulfuric acid are added to W and an observation is noted. An excess of is shaken with water. The resulting mixture is filtered, and the filtrate X is obtained. Two drops of dilute sulfuric acid are added and an observation is noted. Choose the correct statement about these experiments.
| filtrate with higher pH | observation on addition of sulfuric acid to the filtrate with higher pH | |
|---|---|---|
| 1) | W | no change |
| 2) | W | white precipitate |
| 3) | X | no change |
| 4) | X | white precipitate |
- 1
- 2
- 3
- 4
Отговори
4
Answer key: 4.
Решение
Внимание: Непълно решение
The source contains only the answer key, no worked solution.
Answer: 4
Оригинал в Архива: iom-2020-blitz-tasks.pdf · официални решения: iom-2020-blitz-answers.pdf