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The ion reaction equation in which carbon dioxide is introduced into clear lime water to produce white precipitate and then dissolve
Ca2++2OH-+CO2=CaCO3↓+H2O
CaCO3+ H2O + CO2= Ca2+2 HCO3-
The following substances can fade both acidic potassium permanganate solution and bromine water and react with sodium hydroxide:() A. Acetic acid B. Methyl acetate C. Glycerol oleate D. Benzoic acid
A. Acetic acid belongs to carboxylic acid, which has the general property of acid, and can react with sodium hydroxide to produce sodium acetate and water, but it can not fade acid potassium permanganate solution and bromine water, so A is inconsistent;
B. Methyl acetate belongs to ester and sodium hydroxide, forming sodium acetate and methanol, which can not fade acid potassium permanganate solution and bromine water, so B is inconsistent.
C. Glycerol oleate belongs to ester which can react with sodium hydroxide. Unsaturated bond in molecule can be oxidized by acid potassium permanganate to make acid potassium permanganate fade permanganate fade, and the addition reaction can take place with bromine water, which is the bromine water fade, so C conforms to;
D. Benzoic acid belongs to carboxylic acid, which can react with sodium hydroxide, but can not fade acid potassium permanganate solution and bromine water, so D is inconsistent.
Therefore: C
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