Question

Cu(2+)+2OH(-)=Cu(OH)2
Ba(2+)+SO4(2-)=BaSO4
Ca(2+)+CO3(2-)=CaCO3
Pb(2+)+S(2-)=PbS(осадок)
Помогите!

Answer 1

BaCl2  + Na2SO4 = BaSO4 +2NaCl
CaCl2 +K2CO3 = CaCO3 + 2KCl
Pb(NO3)2 + Na2S = PbS +2 NaNO3

Answer 2

CuCl2 + 2KOH = Cu(OH)2 +2KCl

Answer 3

1)CuCl2+2NaOH=Cu(OH)2+Na2SO4
2)BaCl2+Na2SO4=BaSO4+2NaCl
3)CaSO4+Na2CO3=CaCO3+Na2SO4
4)Pb(NO3)2 +Na2S=PbS+2NaNO3