设原溶液的密度为a,原溶液中溶质NaNO3的质量为b.
b/150a = 28%
b/(150a+100) = 14%
解得
b/150a = 2b/(150a+100)
a=2/3克每毫升 b=28克
NaNO3物质的量为 28/85 mol则物质的量浓度为0.33/0.150 mol/L
设原溶液的密度为a,原溶液中溶质NaNO3的质量为b.
b/150a = 28%
b/(150a+100) = 14%
解得
b/150a = 2b/(150a+100)
a=2/3克每毫升 b=28克
NaNO3物质的量为 28/85 mol则物质的量浓度为0.33/0.150 mol/L