Предмет: Химия, автор: Frovana

1) Укажите, какие из приведённых ниже пар веществ могут вступать в необратимую реакцию в водной среде: 
а)карбонат калия + гидроксид бария 
б)фосфорная кислота + нитрат калия 
в)карбонат кальция и соляная кислота
г)нитрат меди(II) и сульфат алюминия.
Напишите урав-я протекающих реакций в молекулярном и ионно-молекулярном виде. Объясните почему они протекают.  Помогите пожалуйста.

Ответы

Автор ответа: Weakelm
0
а) K2CO3 + Ba(OH)2 --> 2KOH + BaCO3(осадок.)
Ba(2+) + CO3(2-) --> BaCO3
Реакция необратима, т.к. образуется осадок.
в)СaCO3 + 2HCl --> CaCl2 + H2O + CO2 
 2H(+) + CO3(2-) --> H2O + CO2
Реакция необратима, т.к. образуется вода, и выделяется газ.
Остальные пары в-в не вступают в необратимую реакцию.

Автор ответа: Frovana
0
спасибо!)
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