Question

Concentrated aqueous sulphuric acid is 98%H2SO4, (w /v) and has a density of 1.80 g/ ml Molarity of solution
(1)1 M
(2) 1.8 M
(3) 10 M
(4) 1.5 M​

Answer 1

Answer:

Molarity = moles of substance

volume in liters

moles of H2SO4 = mass/ molar mass

denisty = 1.8g/ml(that is 1800g/L)

mass of H2SO4 98% of 1800= 1764g(this is mass of H2SO4 in 1L)

molar mass= 2+32+64 = 98

moles = mass/molar mass = 1764/98*10^-3

= 1.8 moles

Therefore in !liter of H2SO4 molarity= moles/volume in liters= 1.8/1L

= 1.8M

Molarity =1.8M