A.CaCOHCl濃HHO B.CaCOHClCao C.CaCO濃HNONaOH
A.>2% B.<2% C.=2%
A.先滴過量氨水,過濾,再用鹽酸溶解 B.先滴過量NaOH溶液,過濾,再用鹽酸溶解 C.先滴過量溶液,過濾,再用鹽酸溶解