Sodium carbonate is recovered as decahydrate from 1000kg of 5% solution of sodium carbonate in water. If it is desired that 95% of Na2CO3 is to be recovered as decahydrate by cooling to 278 K, determine the following: (a) the mass of water evaporated (b) the mass of crystals obtained (Na2CO3 -10H2O). The solubility of Na2CO3 in water at 278K is 9.0% (weight)

Calculate the pH for 0.0511 M cyanic acid solution with pKa = 3.70.   A) 1.85   B) 1.30 C) 4.99 D) 2.51

Which of the following properties of ozone (a pollutant in the lower atmosphere but part of a protective shield against UV light in the upper atmosphere) are physical, and which are chemical? • bluish color• pungent odor• very reactive• decomposes on exposure to ultraviolet light• gas at room temperature

Using the equipartition theorem, determine the molar specific heat, Cv, of a gas in which each molecule has s degrees of freedom.

What is the proeutectoid phase for an iron-carbon alloy in which the mass fractions of total ferrite and total cementite(Fe3C) are 0.92 and 0.08, respectively?

EVALUATION OF MASS DIFFUSIVITY Find the diffusivity of CO, in N2 at 30°C and 740 mm Hg. Find the diffusivity of benzene vapor in air at 600C and 120 kPa Find the diffusivity of isopropyl alcohol in liquid water at 45°C

Choose the correct option: 19. A reduced pressure (vacuum) distillation is used when: a) The component of interest has a high boiling point b) The substance decomposes at relatively low temperatures. c) The boiling points are very close. d) There is a racemic mixture

At the azeotropic composition, the mixture's bubble point and dew point are ________.    a complementary   b equal to one   c equal to zero   d equal

Research for the boiling point of the following mixture of compounds. Encircle which would boil first. Finally, indicate what type of distillation will you use to separate them.

1 Temperature (°C) 110 100 90 80 mol % Toluene 0 mol % Benzene 100 20 80 Vapor line 40 60 60 40 Composition (mol %) Liquid line 80 20 100 0 If the composition in (d) is condensed what would be more enriched compared to the mixture of the 50 mol % benzene and 50 mol % toluene?