(1)设100克稀盐酸含溶质Xg
HCl + NaOH = NaCl + H2O
36.5 40 58.5 36.5/X =40/(100*20%)
X 100*20% y X=18.25g
稀盐酸中溶质的质量分数:18.25/100 = 18.25%
(2)设生成NaCl质量为y
58.5/y=40/(100*20%)
y=29.25
反应后溶液中溶质的质量分数:29.25/200=14.63%
(1)设100克稀盐酸含溶质Xg
HCl + NaOH = NaCl + H2O
36.5 40 58.5 36.5/X =40/(100*20%)
X 100*20% y X=18.25g
稀盐酸中溶质的质量分数:18.25/100 = 18.25%
(2)设生成NaCl质量为y
58.5/y=40/(100*20%)
y=29.25
反应后溶液中溶质的质量分数:29.25/200=14.63%