為測定某Na2SO4溶液中溶質(zhì)的質(zhì)量分?jǐn)?shù),取300g Na2SO4溶液,平均分為三份,每份樣品均按如圖所示進行實驗,
實驗數(shù)據(jù)見如表。請計算:
|
實驗1 |
實驗2 |
實驗3 |
樣品質(zhì)量/g |
100 |
100 |
100 |
BaCl2溶液質(zhì)量/g |
60 |
120 |
180 |
m-燒杯質(zhì)量/g |
11.65 |
23.3 |
23.3 |
(1)100g Na
2SO
4溶液完全反應(yīng)時,所得沉淀的質(zhì)量為
23.3
23.3
g;
(2)Na
2SO
4溶液中溶質(zhì)的質(zhì)量分?jǐn)?shù)。(計算結(jié)果精確至0.1%)