1) K2S+ NCL --> H2S + KCl
2)CuCl2 + NaOH -->Cu(OH) 2 + Na
3) FeO + NBr --> FeBr2 + H2O
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Ответы на вопрос:
bacl2 + na2so4 = baso4↓ + 2nacl
ba2+ + 2cl- + 2na+ + so4 2- = baso4↓ + 2na+ + 2cl-
ba2+ + so4 2- = baso4↓
ca(no3)2 + na2co3 = caco3↓ + 2nano3
ca2+ + 2no3- + 2na+ + co3 2- = caco3↓ + 2na+ + 2no3-
ca2+ + co3 2- = caco3↓
2naoh + mgcl2 = 2nacl + mg(oh)2↓
2na+ + 2oh- + mg2+ + 2cl- = 2na+ + 2cl- + mg(oh)2↓
mg2+ + 2oh- = mg(oh)2↓
fecl3 + 3naoh = fe(oh)3↓ + 3nacl
fe3+ + 3cl- + 3na+ + 3oh- = fe(oh)3↓ + 3na+ + 3cl-
fe 3+ + 3oh- = fe(oh)3↓
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