Question

B C. D. high temperature, high pressure l ow temperature, high pressure high temperature, low pressure low temperature, low pressure none of these, unless a catalyst is present The following reaction is at equilibrium at one atmosphere, in a closed container NaOH(s) + CO2(g) + NaHCO3) 34. А. B. C. D. Which, if any, of the following actions will decrease the total amount of Cogas present at equilibrium? adding N, gas to double the pressure adding more solid NaOH decreasing the volume of the container removing half of the solid NaHCO3 none of these choices is correct The following reaction is at equilibrium at a pressure of 1 atm, in a closed container NaOH(s) + CO2(g) + NaHCO3(8): AHI <0 E 35. B. C. D. E Which, if any, of the following actions will decrease the concentration of CO2 gas present at equilibrium? adding Nz gas to double the pressure adding more solid NaOH increasing the volume of the container lowering the temperature none of these choices is correct The following reaction is at equilibrium in a closed container, 36. CuSO4.5H2O() =CuSO4(s) + 5H2O(g) B. D. E. 37. A. B. C. D. E. 38. Which, if any, of the following actions will lead to an increase in the pressure of H:0 present at equilibrium? increasing the volume of the container decreasing the volume of the container adding a catalyst removing some solid Cuso none of these choices is correct The solubility of calcium chromate is 1.56 x 10g/100 mL of solution. What is the Kap for CaCro? 2.4 x 10-4 1.5 x 10 7.6 x 10 1.0 x 10* <1.0 x 10 Calculate the solubility of barium carbonate, Bacos, in pure water. Kup - 2.0 x 10 9

Answer 1

34 NaOH(s) + CO2(0) NaHCog(s) . According to Le Chatelier's Principle any change of variable that determine the state of a system in equilibrium o causes a shift in position ... of equilibrium in a direction that tends to counteract the change of variable under . consideration a) adding Ng gas to double the pressure : No gas will not react with any of reactanots or product. so here total pressure will increase twice proportionally with En [nesteren denotes the gream moles of the components ] so (P/Enro) teen will remain unchanged. so, ko (equilibrium constant) wilt. remain and constant without disturbing equilibrium

B. Adding more solid NaOH- NaOH is solid in state So, it has no effect on equilibrium constant so, its amount change has also no effect on equilibrium c. Decreasing the volume of containers When the volume of containes is de crecased the system tends to attain lower volume. Then as the way to decrease the volume is to decrease the no. of moles. So, the reaction will be shifted in that direction where no. of moles de creeased. HUO, an= (no. of moles of product in / . gascous state) - (no. of moles of reactant in - gaseous state) . = 0- 1 = -1 so, the reaction will shift to forward and amount of CO2 will de creease

D. голон • lo% of Naнco, -. . NaHCO3 is solid in state. so, it has no effect in equilibrium constant and its change of ainoint has also no effect on equilibrium. .