有一包不纯的CaCO3样品,其中只含一种杂质,现取该样品5克与足量稀盐酸反应生成2.3克CO2,则所混杂质可能是 请选择DCBA4]4@4V;{-c9A1_3o(M6K+o2o,l){2D0i(H(Q/I+W1h2`
A. MgCO36K+o2o,l){2D0i(H(Q/I+W1h2`
B. Na2CO36K+o2o,l){2D0i(H(Q/I+W1h2`
C. K2CO36K+o2o,l){2D0i(H(Q/I+W1h2`
D. KHCO36K+o2o,l){2D0i(H(Q/I+W1h2`