Предмет: Химия, автор: wwwchebotaev

что произойдет, если пластинку, изготовленную из металла Me1, опустить в раствор соли металла Me2? Напишите уравнения возможных реакций в ионной форме;
(металл) Me1=Ni
(соль металла) Me2=Bi(NO3)3
РАСПИШИТЕ РЕШЕНИЕ , ПОЖАЛУЙСТА(((

Ответы

Автор ответа: gusmakvlad
2
3Ni+2Bi(NO3)3=3Ni(NO3)2+2Bi
3Ni(0)+2Bi(+3)+3(NO3)(-)=3Ni(+2)+2NO3(-)+2Bi(0)
3Ni(0)+2Bi(+3)=3Ni(+2)+2Bi(0) выделится висмут
Автор ответа: wavelength
4
\rm 3Ni + 2Bi(NO_3)_3 \longrightarrow 3Ni(NO_2)_2 + 2Bi

Висмут в ряду напряжений стоит после никеля. Теоретически, если бы нитрат висмута с водой бы не взаимодействовал, то прошла бы именно верхняя реакция (для школьного курса хватит).

Нитрат висмута гидролизуется до основных малорастворимых солей:
\rm Bi(NO_3)_3 + H_2O \longrightarrow Bi(OH)(NO_3)_2 + HNO_3 \\
Bi(NO_3)_3 + 2H_2O \longrightarrow Bi(OH)_2(NO_3)\downarrow + 2HNO_3

поэтому вышеуказанный процесс в реальности идёт, но довольно плохо; много побочных продуктов.
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