A.2NaOHB.1/2NaOHC.NaOHD.1/5NaOH
A.稀釋前后溶質(zhì)的質(zhì)量不變B.稀釋前后溶質(zhì)的質(zhì)量分?jǐn)?shù)不變C.稀釋前后溶質(zhì)的物質(zhì)的量不變D.稀釋前后試劑的質(zhì)量不變