Ответы на вопрос:
1) 3ba(oh)2 + p2o5 = ba3(po4)2 + 3h2o
ba(oh)2 + so3 = baso4 + h2o
6naoh + p2o5 = 2na3po4 + 3h2o
2naoh + so3 = na2so4 + h2o
3) feso4 +2 naoh = fe(oh)3 + na2so4
cu(no3)2 + 2naoh = cu(oh)2 + 2nano3
cr2(so4)3 + 6naoh =2 cr(oh)3 + 3na2so4
2) koh + hcl = kcl + h2o
3koh + h3po4 = k3po4 + 3h2o
ca(oh)2 + 2hcl = cacl2 +2 h2o
3ca(oh)2 + 2h3po4 = ca3(po4)2 + 6h2o
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