问题
选择题
Na2CO3溶液加入酚酞试液变红,再加或通入少量下列物质一定不能使其红色褪去或变浅的是( )
A.CO2气体
B.Na2O2
C.CaCl2(s)
D.NaCl(s)
答案
答案:D
Na2CO3溶液加入酚酞试液变红,再加或通入少量下列物质一定不能使其红色褪去或变浅的是( )
A.CO2气体
B.Na2O2
C.CaCl2(s)
D.NaCl(s)
答案:D
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