Calculate the amount of barium from Sodium sulphate in a liter. A 100 ml solution of sodium sulphate (Na2SO4) is treated with solution of Barium chloride(BaC12). The precipitate, then ignited and weighed. the precipitate(BaS04) weight is 0.1 gm. Mol.Wt of BaSO4 = 233.42 gm/mol, At. Wt of barium= 56 gm/mol.
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- Please choose the correct answer for each question: 1. Activity of a gas in equilibrium with solution is ______? A. its partial pressure; B.1.0; C. its molar concentration; D. 0.0 2. During a sorption procedure, the substance transferred from the gas or liquid phase to the solid phase is called ______ A. sorbent; B. sorbate; C. partition; D. none of the above 3. When a chemical has a lower KOW, it is more ______ A. hydrophobic; B. hydrophilic; C. more absorbable; D. less absorbable 4. _____ occurs on the adsorbent surface A. Adsorption; B. Sorption; C. Absorption; D. Adsorption and absorption 5. _____ addresses the change in the amount of a substance of interest with time. A. The equilibrium approach; B. The kinetic approach; C. Henry’s Law; D. Freudlich isotherm equationConvert the following from milligrams per liter as CaCO3 to milligrams per liter as the ion or compound. (a) 10.00 mg.L-¹ CO₂ (d) 81.00 mg L-¹ H₂PO (b) 13.50 mg · L-1 Ca(OH)2 (e) 40.00 mg L-¹ CI- (c) 481.00 mg.L-¹ HPO²- .In the previous question a trisodium phosphate solution was prepared. Since the molecular weight of Na3PO4 is 163.94, what concentration in moles per liter was made by combining 0.328 g Na3PO4 with 1.00 L water? Your answer should be in the form 0.---
- When the system is at equilibrium at a particular temperature, C(s) + CO2(g) =2 CO(g) a 4-L flask contains 0.40 mol CO, 0.80 mol CO2, and 0.45 mol C. What is the value of K, at that temperature? O 0.050 O 0.20 1.8 O 0.44(iii) If HOCI (hypochlorous acid) degrades in water per first-order kinetics with a rate constant of 0.12/d. the initial concentration of HOCI is 12 mg/L (a) How long does it take to be reduced to 0.8 mg/l ? (b) what would be concentration after 4 hours? (6)) Calculate the concentration of hydroxide ions *Select a concentration between 0.10 and 0.58 d) Calculate the pH of the methylamine solution
- A nuclear fuel pellet consists of an aluminum cladding[E1 = 90 GPa; α1 = 42.2 × 10-6 /°K] with an outsidediameter of D and an inside diameter of d, restrained toa uranium core [E2 = 190 GPa; α2 = 15.9 × 10-6 /°K] witha diameter d. [D = 17 mm; d = 14 mm; L = 13 mm]Determine the normal force in the aluminum cladding ifthe temperature of the pellet is raised by ΔT = 317 °K.[Hint: The total axial deformations in both materials areidentical. The axial forces induced in both aluminum anduranium are also identical with opposite signs.]A 9.00-mol sample of H₂ gas is contained in the left side of the container shown below, which has equal volumes on the left and right. The right side is evacuated. When the valve is opened, the gas streams into the right side. H₂ Valve Vacuum (a) What is the entropy change of the gas? J/K (b) Does the temperature of the gas change? Assume the container is so large that the hydrogen behaves as an ideal gas. The temperature decreases. O The temperature increases. The temperature does not change. ✓Kerosene has a specific weight of γk = 51.1 lb/ft3 and benzene has a specific weight of γb = 56.2 lb/ft3. A.Determine the weight of kerosene that should be mixed with 8 lb of benzene so that the combined mixture has a specific weight of 52 lb/ft3
- A drinking water treatment plant wants to compare the efficacy of three different solid coagulants, Alum [Al(OH)3(s)], Lime (CaCO3(s)), and Ferric Chloride (FeCl3(s)), for removing the phosphate (PO43-) level to 1 mg/L. The following are the equilibrium reactions [and the respective equilibrium constants (or solubility products, Ksp)] that result in phosphate removalfor each solid, the second reaction being more relevant in each case: Alum: Al(OH)3(s) ↔ Al3+ + 3OH- AlPO4(s) ↔ Al3+ + PO43- Ksp = 9.84 x 10-21 Lime: CaCO3(s) ↔ Ca2+ + CO32- Ca3(PO4)2(s) ↔ Ca2+ + PO43- Ksp = 1 x10-27 Ferric Chloride: FeCl3 (s) ↔ Fe3+ + 3Cl- Fe(PO4)(s) ↔ Fe3+ + PO43- Ksp = 1x10-26.4 What concentrations of Fe 3+, Al3+, and Ca2+ will be needed to maintain a phosphate concentration of 1 mg/L? What would be the best choice of solid coagulant for the Drinking Water Treatment Plant?…NaOH (aq) + HCI (aq) NACI (aq) + H2O (1) Volume of 1.00M HCI (mL) 45.0 Volume of 1.00 M NAOH (mL) 50.0 Initial Temperature ("C) 22.1 Final Temperature (C) 31.6 la) Calculate the moles of HCI used in the reaction. Moles of HCI = mol (b) Calculate the moles of NaOH used in the reaction. Moles NaOH= mol (c) Which reactant is the Limiting Reactant, HCl or NaOH? Limiting Reactant = (d) Is this acid-base neutralization reaction exothermic or endothermic? NOTE: DO Include the correct number of significant figures or you will be marked wrong and DO NOT include units in your answer.The following information is given for n-pentane at 1 atm:boiling point = 36.20°C ΔHvap (36.20°C) = 357.6 J/g melting point = − 129.7°C ΔHfus (−129.7°C) = 116.7 J/g specific heat gas = 1.650 J/g ⋅ °C specific heat liquid = 2.280 J/g ⋅ °C A 26.10-g sample of liquid n-pentane is initially at −51.40°C. If the sample is heated at constant pressure (P = 1 atm), how many kJ of energy are needed to raise the temperature of the sample to 65.30°C?