A sample of concentrated sulphuric acid has a density of 1.83 g cm^-3 and
contains 94.0% of sulphuric acid by mass. What is the concentration ( correct
to one decimal place) of sulphuric acid in the sample? unit = M
Chem CE MC 00 20
2010-09-13 12:41 am
回答 (1)
2010-09-13 2:45 am
✔ 最佳答案
assuming there's 1000cm^3 , that is, 1dm^3, of conc. sulphurc acid. mass of H2SO4 = 1.83 x 1000 x 0.94 = 1720.2 g
no. of mole = mass / molar mass = 1720.2 / 98.1 = 17.5 mole
molarity = no. of mole / volume = ... that's simple.
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