Question

What is the molarity of H,SO, solution that
has a density of 1.84 gm/cc at 35°C and
contains 98% by weight -
(a) 4.18 M
(b) 8.14 M
(c) 18.4 M
(d) 18 M
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Answer 1

Your Answer

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Molar mass of H2SO4 = 98g/mol = Mm....

D =density = 1.84g/cc..

W/w = 98%

V = 1dm3 = 1L = 1000ml = 1000cc

Mass of solution = V x D

M = 1000 x 1.84 = 1840g per 1000cc

Using w/w, 98% of 1840g = H2SO4

= (98/100) x 1840

= 1803.2g = m

Nos of moles = m/Mm

= 1803.2/98

= 18.4moles per 1000cc

molarity = 18.4M

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