Какие реакции из предложенных протекают до конца?

1. Na2CO3+2HCl = 2NACl+H2O+CO2↑

2. CuCl2 + KOH = CuOH2↓+2KCl

3. Cu(OH)2+HCl=CuCL2+OH2O

4. HCl+KOH=KCl+H2O
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