Предмет: Химия, автор: Аноним

Жёсткость воды обусловлена присутствием в воде ионов:
1) Na+
2) K+
3) Ca2+
4) Mg2+
5) Cl-

Ответы

Автор ответа: alihadzievap
1

Ответ:

думаю, что 3) Са2+ .......

Автор ответа: ErkebulanKAZ
3

Ответ:

3) Ca2+ и 4) Mg2+

Объяснение:

ErkebulanKAZ: 100%
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