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Растворы каких электролитов можно взять для получения указанных веществ? a) h2o б) cu(oh)2

Химия

Ответы

lika080489

а) кислота и основание =>   соль + н2о

 

hcl + naoh -> nacl + h2o

 

б)   растворимая соль меди и щелочь 

  cucl2 + 2naoh ==> cu(oh)2 + 2 nacl

MArat

запоминать сами реакции не неадо, лучше выучить свойства оксидов, оснований, солей и кислот, тогда реакции будут решаться легко.

 

1)fe + h2so4 = feso4 + h2(реакция идет при темнературе и если серная к-та концентрированная) - реакция идет, т.к. металлы вытесняют водород с кислот(исключения: hno3 и разбавленная серная кислота)

2)feso4 + 2naoh = na2so4 + fe(oh)2(осадок) - реакция идет, т.к. соль реагирует со щелочью, с выпадением осадка

3)4fe(oh)2 + o2 + 2h2o = 4fe(oh)(эту реакцию уже надо запомнить, да)

 

Misyura_Viktoriya1683

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Растворы каких электролитов можно взять для получения указанных веществ? a) h2o б) cu(oh)2
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