A sample of concentrated sulphuric acid has a density of 1.83gcm^-3 and contains 94.0% of sulphuric acid by mass .What is the concentration of sulphuric acid in the sample?
(Relative atomic masses:H=1.0,O=16.0,S=32.1)
2006-12-25 09:28:27 · 1 個解答 · 發問者 guaeiogaeighi 1 in 科學 ➔ 化學
mass of H2SO4 in 1 cm^3 = 1.83 g
no. of mole of H2SO4 in 1 cm^3 = 1.83 / ( 1X2 + 32 + 16X4 ) = 1.83 / 98 = 0.01867
no. of mole of H2SO4 in 1000 cm^3 = 0.01867 X 1000 = 18.67
Concentration = 18.67 M
2006-12-25 10:34:25 · answer #1 · answered by ? 7 · 0⤊ 0⤋