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第38页

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$ \ \text {Zn+2HCl}\xlongequal[\ \ \ \ \ \ ]{}\ \text {ZnCl}_2+\ \text {H}_2↑$

$ \ \text {Fe+CuCl}_2\xlongequal[\ \ \ \ \ \ ]{}\ \text {FeCl}_2+\ \text {Cu}$

$ \ \text {CuO+H}_2\ \text {SO}_4\xlongequal[\ \ \ \ \ \ ]{}\ \text {CuSO}_4+\ \text {H}_2\ \text {O}$

$ \ \text {CO}_2+\ \text {Ca(OH)}_2\xlongequal[\ \ \ \ \ \ ]{\ \ \ \ \ \ }\ \text {CaCO}_3↓+\ \text {H}_2\ \text {O}$

$ \ \text {NaOH+HCl}\xlongequal[\ \ \ \ \ \ ]{}\ \text {NaCl+H}_2\ \text {O}$

$ \ \text {BaCl}_2+\ \text {H}_2\ \text {SO}_4\xlongequal[\ \ \ \ \ \ ]{}\ \text {BaSO}_4↓+2\ \text {HCl}$

$ \ \text {CuSO}_4+2\ \text {NaOH}\xlongequal[\ \ \ \ \ \ ]{}\ \text {Na}_2\ \text {SO}_4+\ \text {Cu(OH)}_2↓$

$ \ \text {NaCl+AgNO}_3\xlongequal[\ \ \ \ \ \ ]{}\ \text {AgCl}↓+\ \text {NaNO}_3$

(1)(2)

(3)(5)(6)(7)(8)