25cm3的0.120M氫氧化鈉被30.00cm3某二元酸H2X的溶液完全中和,每該溶液含有6.30g酸.計算 a.酸溶液的摩爾濃度 b.酸的摩爾質量?
回答 (1)
2019-05-31 2:15 am
2 NaOH + H2X → Na2X + 2 H2O
a.
(25 cm^3) × (0.120 M NaOH) × (1 mol H2X / 2 mol NaOH) / (30.00 cm^3 H2X) = 0.050 M H2X
b.
(6.30 g/L) / (0.050 mol/L) = 126 g/mol H2X
a.
(25 cm^3) × (0.120 M NaOH) × (1 mol H2X / 2 mol NaOH) / (30.00 cm^3 H2X) = 0.050 M H2X
b.
(6.30 g/L) / (0.050 mol/L) = 126 g/mol H2X
收錄日期: 2021-04-24 07:33:07
原文連結 [永久失效]:
https://hk.answers.yahoo.com/question/index?qid=20190530135148AA3Iop1