№1.

Al(OH)₃+NaOH=Na[Al(OH)₄]
H₂SO₄ + 2NaOH = Na₂SO₄ + 2H₂O
Mg(OH)₂ + 2HNO₃ = Mg(NO₃)₂ + 2 H₂O
Al(OH)₃ + 3HNO₃ = Al(NO₃)₃ + 3H₂O
Na₂CO₃ + 2HNO₃ = 2NaNO₃ + CO₂ + H₂O

№2.

Zn+2HCl=ZnCl₂+H₂

ZnCl₂+2NaOH=2NaCl+Zn(OH)₂

Zn(OH)₂+2NaOH=Na₂ZnO₂+2H₂O

№3.

Zn(OH)₂ + 2NaOH = Na₂ZnO₂ + 2H₂O

m(p-pa NaOH) = V(p-pa)•p = 164•1,22 = 200 г

m(NaOH) = W(NaOH)•m(p-paNaOH) = 0,2•200 = 40 г

n(NaOH) = m(NaOH)/M(NaOH) = 40/40 = 1 моль

По уравнению n(Na₂ZnO₂) = n(NaOH)/2 = 0,5 моль

m(Na₂ZnO₂) = n(Na₂ZnO₂)•M(Na₂ZnO₂) = 0,5•143 = 71,5 г.