1. A 100 kg of 20% aqueous solution of was fed in a diluting stream of pure water to produce a 8% NaOH. Calculate the ratios (g H.O/g feed solution) and (g product solution/g feed solution). Determine the feed rates of 20% solution and diluting water needed to produce 2310 kg/min of the 8% solution.

A student is asked to standardize a solution of barium hydroxide. He weighs out 1.09 g potassium hydrogen phthalate (KHC8H404, treat this as a monoprotic acid). It requires 22.1 mL of barium hydroxide to reach the endpoint. A. What is the molarity of the barium hydroxide solution? M This barium hydroxide solution is then used to titrate an unknown solution of nitric acid. B. If 29.0 mL of the barium hydroxide solution is required to neutralize 29.8 mL of nitric acid, what is the molarity of the nitric acid solution? M

Q4) Distillation column (Figure Q4) separates 10000 kg/hr of a 50% benzene-50% toluene mixture. The product (D) recovered Condensor from the condenser at the top of the column contains 98% benzene, and the bottom (W) from the column contains 90% D toluene. Calculate the mass flowrate of the top and bottom product and calculate the mass and molar fraction of the top and Distillation bottom products. Reboiler Figure: Q4 R.

2. A continuous distillation column handles a mixture consisting of 40 percent of benzene and 60 percent of toluene at the rate of 4 kg/s, and separates it into an overhead product contalning 97 per cent of benzene and a bottom product containing 97 per cent toluene. All percentages are by mass. The reflux ratio at the top of the column is 2.85 (ie. R, = 2.85). The feed enters as a saturated liquid. Equilibrium curve for benzene/toluene system is provided. a. Calculate the mass flowrates of the overhead and the bottom products b. Determine the theoretical number of plates required for the separation. c. What is the actual number of plates required if the plate effictency is 75 percent? d. Where should the feed plate be located? e. Determine the minimum number of plates required (Mw». = 78 kg/kmol ; MwTotuene = 92 kg/kmol) benzene

Applying the Kjeldahl method, a 0.5707 g water-soluble fertiliser sample was dissolved and analysed for Nitrogen. After digestion the distilled ammonia was collected in 100 mL of 0.1334 M boric acid. This solution required 26.27 mL of 0.202 M HCl for titration to the methyl red end point. Calculate the % N (AW =14 g/mol) in the fertilizer.

A rotameter records 100 L/h of liquid mixture being pumped into a distillation column operating at steady-state. This feed mixture contains 30 wt% acetone (A) and 70 wt% H2O. During the processing, it is able to achieve a top product stream with 90 wt% A while the bottom product stream contained 5% of the A fed to the column and the rest H2O. 1. What is the ratio of top product to feed? The specific gravity of the feed is 0.75. a. insufficient information to make a conclusion b. lesser than 1 c. greater than 1           d. 1 2. How many of DoF?

4. [Scrubber]. A coal-fired combustion system produces flue gas that contains particulate matter. To reduce the amount of particles, the flue gas is treated in a scrubber. The measurement of the mass and size of the particles at the inlet and outlet of the scrubber yielded the size distribution data given in the following table: Particle diameter [um] (size interval: dlower → dupper) 0.10.25 0.25 → 0.5 0.5 → 1.0 1.0→2.0 2.05.0 Formulas for question 4: . Particle mass at scrubber inlet [mg] 623 55.4 12.6 8.9 7.1 5.0 10 7.7 10 →30 6.6 30→ 50 4.3 The mass of particles in each size interval was measured on a basis of 1 m²³. 31.4 33.2 123 a) What is the overall efficiency of the scrubber? [Ans: noverall 96.7 %] b) Calculate the collection efficiency (na,i) of the scrubber and the particle geometric average diameter (dpi) for each size interval. Create a graph showing the variation of na,i with dp,i. (PTO) efficiency: nd,i (%) = - 394 775 1055 c) Calculate the mass-average diameter of the…

7. Strawberries contain 15% solids and 85% water. To produce 100 kg/h of strawberry jam, crushed strawberries and sugar are mixed in a mixer. After mixing, the mixture is sent to a heated evaporator where water is removed. The strawberry jam leaving the evaporator has a final composition of 63% sugar, 7.7% solids and 29.3% water. All percentages given are in mass percent. (a) Draw a block flow diagram of the process. (b) Calculate the mass of crushed strawberries and sugar fed to the mixer. (c) Calculate the mass flow rate of water removed in the evaporator. (d) Calculate the composition of the mixture leaving the mixer.

Complete the question by hand calculation(please show every step):-Do the mass balance, and find the flow rate of the vapour and liquid outlets of the last separator and purge stream and recycle stream flow rate for the following question by HAND CALCULATION:- Methanol can be produced from natural gas(syngas gas)the following syngas gas (feed) has the following conditions and composition 915 kgmole/hour Temperature 131.7 ºCPressure 1187 psiaComponent Composition (mol%)Carbon Monoxide 15.63Carbon Dioxide 7.93Hydrogen 73.31Nitrogen 0.33Methane 2.61Water 0.19TOTAL 100.00How the proccess flow diagram is attached to this question.Details of the process:- Firstly feed is mixed with the recycle stream using a mixer Output of the mixer is put into the reactorwhere the following two reactions occur:-CO2 + 3H2 <--> CH3OH + H2OANDCO + 2H2 <--> CH3OH Reactor output is cooled to from  246.3 degrees celcius to 37.78 degrees using a cooler(using 4.229e+007 of heatflow)  Then the cooled…

Two aqueous NaOH streams are combined. Stream A is 26% NaOH by mole. Stream B is 69% NaOH by mole. The product (combined) stream has a flow rate of 125 lbmole/h and is 57% NaOH by mole. Determine the flow rate of stream A and stream B (lbmole/h).