Question

Please answer fast
Concentrated aqueous sulphuric acid is 98% H2SO4

(w/v) and has a density of 1.80 gmL–1. Molarity of

solution

Answer 1

Molarity = moles of substance

volume in liters

moles of H2SO4 = mass/ molar mass

density = 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

= 18 moles

Therefore,

H2SO4 molarity= moles/

volume in liters= 18/1L

= 18M

Molarity =18M

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