Question

（2005?青島）實驗室中要配制150g溶質(zhì)質(zhì)量分?jǐn)?shù)為12%的氫氧化鈉溶液，需氫氧化鈉

18

g，水

132

g．

Answer 1

分析：根據(jù)溶質(zhì)質(zhì)量=溶液質(zhì)量×溶質(zhì)的質(zhì)量分?jǐn)?shù)、溶劑質(zhì)量=溶液質(zhì)量-溶質(zhì)質(zhì)量，結(jié)合題意進(jìn)行分析計算即可．

解答：解：根據(jù)溶質(zhì)質(zhì)量=溶液質(zhì)量×溶質(zhì)的質(zhì)量分?jǐn)?shù)，配制150g溶質(zhì)質(zhì)量分?jǐn)?shù)為12%的氫氧化鈉溶液，需氫氧化鈉的質(zhì)量=150g×12%=18g；根據(jù)溶劑質(zhì)量=溶液質(zhì)量-溶質(zhì)質(zhì)量，則所需水的質(zhì)量=150g-18g=132g．
故答案為：18；132．

點評：本題難度不大，靈活運用溶質(zhì)質(zhì)量=溶液質(zhì)量×溶質(zhì)的質(zhì)量分?jǐn)?shù)、溶劑質(zhì)量=溶液質(zhì)量-溶質(zhì)質(zhì)量是正確解答本題的關(guān)鍵．