You are working in the lab and your TA gives you a yellow colored solution at equilibrium. The solution contains unknown concentrations of the chemicals in the reaction below. You then add 6.00 ml of 3M sodium hydraxide to the solution. Predict what your observation would be and select the explanation as to why this would occur. Cro,2 (aq) + H3O°(aq) <--> CryO,7 (aq) + H2O() yellow orange

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You are working in the lab and your TA gives you a yellow colored solution at
equilibrium. The solution contains unknown concentrations of the chemicals in the
reaction below. You then add 6.00 ml of 3 M sodium hydroxide to the solution.
Predict what your observation would be and select the explanation as to why this
would occur.
Cro,2 (aq) + H3O*(aq) <--> Cr2O,7 (aq) + H20()
yellow
orange
O The solution turns orange because addition of sodium hydroxide decreases the H+
concentration, thereby decreasing the pH of the solution, causing the reaction to shift
toward products.
O The solution turns orange because increased base concentration increases the negative
charge of the solution, causing the reaction to shift toward reactants.
The solution stays yellow because the addition of sodium hydroxide decreases H30+
concentration in the solution, thereby causing the pH to increase, causing the reaction to
shift toward the reactants
O The solution turns orange because the concentration of reactants is increased, causing the
reaction to shift toward the products.
The solution stays yellow because increased H30+ ion concentration causes an increase
in acid, causing the reaction to shift toward products.
Transcribed Image Text:You are working in the lab and your TA gives you a yellow colored solution at equilibrium. The solution contains unknown concentrations of the chemicals in the reaction below. You then add 6.00 ml of 3 M sodium hydroxide to the solution. Predict what your observation would be and select the explanation as to why this would occur. Cro,2 (aq) + H3O*(aq) <--> Cr2O,7 (aq) + H20() yellow orange O The solution turns orange because addition of sodium hydroxide decreases the H+ concentration, thereby decreasing the pH of the solution, causing the reaction to shift toward products. O The solution turns orange because increased base concentration increases the negative charge of the solution, causing the reaction to shift toward reactants. The solution stays yellow because the addition of sodium hydroxide decreases H30+ concentration in the solution, thereby causing the pH to increase, causing the reaction to shift toward the reactants O The solution turns orange because the concentration of reactants is increased, causing the reaction to shift toward the products. The solution stays yellow because increased H30+ ion concentration causes an increase in acid, causing the reaction to shift toward products.
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