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第27页

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

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

$ \ \text {Na}_2\ \text {CO}_3+2\ \text {HCl}\xlongequal[]{}2\ \text {NaCl}+\ \text {H}_2\ \text {O}+\ \text {CO}_2↑$

$ \ \text {Na}_2\ \text {CO}_3+\ \text {Ca(OH)}_2\xlongequal[\ \ \ \ \ \ ]{}\ \text {CaCO}_3↓+2\ \text {NaOH}$

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

$ \ \text {Fe+2HCl}\xlongequal[\ \ \ \ \ \ ]{}\ \text {FeCl}_2+\ \text {H}_2↑$

$ \ \text {Fe+CuSO}_4\xlongequal[\ \ \ \ \ \ ]{}\ \text {FeSO}_4+\ \text {Cu}$

$ \ \text {CaO}+\ \text {H}_2\ \text {O}\xlongequal[\ \ \ \ \ \ ]{\ \ \ \ \ \ }\ \text {Ca(OH)}_2$

$ \mathrm{ H_2O＋SO_3\xlongequal[\ \ \ \ \ \ ]{}H_2SO_4} ($合理答案均可)

$ 2\ \text {NaOH}+\ \text {CO}_2\xlongequal[\ \ \ \ \ \ ]{\ \ \ \ \ \ }\ \text {Na}_2\ \text {CO}_3+\ \text {H}_2\ \text {O}$

$ \ \text {C+2CuO}\xlongequal[\ \ \ \ \ \ ]{高温}2\ \text {Cu+CO}_2↑$

$ \ \text {2Cu+O}_2\xlongequal[\ \ \ \ \ \ ]{△}2\ \text {CuO}$