Q5: At 25°C, an aqueous solution containing 35.0 wt% H2SO4 has a specific gravity of 1.2563. A quantity of the 35% solution is needed that contains 195.5 kg of H2SO4. (a) Calculate the required volume (L) of the solution using the given specific gravity. (b) Estimate the percentage error that would have resulted if pure-component specific gravities of H2SO4 (SG 1.8255) and water had been used for the calculation instead of the given specific gravity of the mixture.
Q5: At 25°C, an aqueous solution containing 35.0 wt% H2SO4 has a specific gravity
of 1.2563. A quantity of the 35% solution is needed that contains 195.5 kg of H2SO4.
(a) Calculate the required volume (L) of the solution using the given specific gravity.
(b) Estimate the percentage error that would have resulted if pure-component specific
gravities of H2SO4 (SG 1.8255) and water had been used for the calculation instead of
the given specific gravity of the mixture.
Q6: A mixture is 20.0 mole% ethyl alcohol, 60.0 mole% ethyl benzene, and 20.0
mole% acetic acid. Calculate the mass fractions of each compound. What is the
average molecular weight of the mixture? What would be the mass (kg) of a sample
containing 25.0 kmol of ethyl benzene?
Q7: Liquid benzene and liquid Methanol are blended to form a stream flowing at a
rate of 900 lbm/h. An on-line densimeter (an instrument used to determine density)
indicates that the stream has a density of 0.850 g/ml. Using specific gravities from
Table B.1, estimate the mass and volumetric feed flow rates of the two hydrocarbons
to the mixing vessel (in American engineering units)
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