A 90-wt-% aqueous H₂SO4 solution at 25°C is added over a period of 6 hours to a tank containing 4000 kg of pure water al

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A 90 Wt Aqueous H So4 Solution At 25 C Is Added Over A Period Of 6 Hours To A Tank Containing 4000 Kg Of Pure Water Al 1 (91.11 KiB) Viewed 14 times

A 90-wt-% aqueous H₂SO4 solution at 25°C is added over a period of 6 hours to a tank containing 4000 kg of pure water also at 25°C. The final concentration of acid in the tank is 50-wt-%. The contents of the tank are cooled continuously to maintain a constant temperature of 25°C. Because the cooling system is designed for a constant rate of heat transfer, this requires the addition of acid at a variable rate. Determine the instantaneous 90-%-acid rate as a function of time, and plot this rate (kg-s-¹) vs. time. The data of the preceding problem may be fit to a cubic equation expressing HF/(x1x2) as a function of x₁, and the equations of the preceding problem then provide expres- sions for æ and æ.