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)
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Поделитесь своими знаниями, ответьте на вопрос:
Растворы каких электролитов можно взять для получения указанных веществ? a) h2o б) cu(oh)2
а) кислота и основание => соль + н2о
hcl + naoh -> nacl + h2o
б) растворимая соль меди и щелочь
cucl2 + 2naoh ==> cu(oh)2 + 2 nacl