除去下列溶液中的杂质(括号内是杂质)所用试剂不正确的是(  

除去下列溶液中的杂质(括号内是杂质)所用试剂不正确的是(  

ANaOH溶液[Ba(OH)2]:用Na2SO4溶液

BKOH溶液[K2CO3]:用Ca(OH)2溶液

CNaCl溶液[Na2SO4]:用Ba(NO3)2溶液

DHNO3溶液[HCl]:用AgNO3溶液

答案

C

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