Предмет: Химия, автор: ROZA2304

срочно на завтра умаляю.Розпізнання розчинів сполук Для роботи видано натрій гідроксид,розбавлену сульфатну кислоту . завдання:визначити в якій пробірці знаходиться натрій хлорид ,магній хлорид ,цинк сульфат

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Автор ответа: KEYS

сульфат цинка можно узнать по выпавшему осадку, уравнение реакции будет следующее:

1) ZnSO4 + NaOH = ZnOH2 (выпадет в осадок) + Na2SO4

2) MgCl2 + NaOH = Mg(OH)2 (осадок) + NaCl

3) NaCl + H2SO4 = HCl (газ улетучится) + Na2SO4

Вот и все:)

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