(1)C+2H 2SO 4(浓)
CO 2↑+2SO 2↑+2H 2O
(2)品红褪色;产物中有SO 2; (3)品红不褪色;SO 2已除尽
(4)澄清石灰水变浑浊;产物中有CO 2;CO 2+Ca 2++2OH -=CaCaO 3↓+H 2O
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(1)C+2H 2SO 4(浓)
CO 2↑+2SO 2↑+2H 2O
(2)品红褪色;产物中有SO 2; (3)品红不褪色;SO 2已除尽
(4)澄清石灰水变浑浊;产物中有CO 2;CO 2+Ca 2++2OH -=CaCaO 3↓+H 2O
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