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11 Feb 2020

Indicate how the concentration of each species in the chemical equation will change to reestablish equilibrium after changing the concentration of the reactant or product. An up arrow indicates an increase in concentration, a down arrow indicates a decrease in concentration, and leaving it blank means there is no change in the concentration.

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20 For the reaction of CO2(g) + NO(g) -> NO2(g)+CO(g), if the pressure of the reaction vessel is increased by adding He(g), the equilibrium will be reestablished by the reaction (Note: For all equilibrium problems, the single direction arrow shouid be a double arrow representing an equilibnium.) Choose one answer. Marks: 1 a. shifting to the right by increasing the concentration of the products. b. shifting to the right by increasing the concentration of the reactants c. shifting to the left by increasing the concentration of the products. d. shifting to the left by increasing the concentration of the reactants. e. not changing as the change in pressure will not affect the equilibrium. For the reaction of CO2(g)+ NOg) -> NO2(g)+CO(g)if the volume of the reaction vessel is reduced, the equilibrium will be reestablished by the reaction (Note: For all equilibrium problems, the single direction arrow shouid be a double arrow representing an equilibnium.) Choose one answer. Marks: 1 a. shifting to the right by increasing the concentration of the products. b. shifting to the right by increasing the concentration of the reactants c. shifting to the left by increasing the concentration of the products. d. shifting to the left by increasing the concentration of the reactants. e. not changing as the change in volume will not affect the equilibrium. For the reaction of N2(g) + O2(g) -> 2NO(g), increasing the temperature will cause the reaction to (Note: For all equilibrium problems, the single direction arrow shouid be a double arrow representing an equilibnium.) Choose one answer. Marks: 1 a. shift to the right by increasing the concentration of the products. b. shift to the right by increasing the concentration of the reactants c. shift to the left by increasing the concentration of the products. d. shift to the left by increasing the concentration of the reactants. e. not change as the change in temperature will not affect the equilibrium. 23 What is the Bronsted-Lowry definition of a base? Marks: 1 a. A substance that increases the hydrogen ion concentration in water b. A substance that increases the hydroxide ion concentration in water c. A substance that accepts proton. d. A substance that donates proton. Choose one answer

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