Предмет: Химия, автор: TaNyAnA2000

Выберите два вещества, с каждым из которых кальций реагирует без нагревания.
1. Гидроксид цинка
2. Сульфат калия
3.Кремневая кислота
4.Соляная кислота
5.Вода

Ответы

Автор ответа: AnnWebster2208

0

4;5
Ca + 2H2O → Ca(OH)2 + H2
НЕ ПУТАЙ С ЭТОЙ! ЭТА ПРИ 200-300 градусах протекает:
2Ca + H2O → CaO + CaH2

Здесь все просто:
Ca + 2HCl → CaCl2 + H2

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