To predict the direction in which the addition of an acid to a solution containing bromophenol blue will drive the equilibrium, we need to consider Le Châtelier's principle. This principle states that if a dynamic equilibrium is disturbed by changing the conditions, the position of equilibrium moves to counteract the change.

Bromophenol blue is a pH indicator that changes color depending on the pH of the solution. In acidic conditions, it typically appears yellow, and in basic conditions, it appears blue. The equilibrium can be represented as follows:

$$ \text{HIn} \rightleftharpoons \text{H}^+ + \text{In}^- $$

Where:
- $\text{HIn}$ is the protonated form (yellow).
- $\text{In}^-$ is the deprotonated form (blue).

When an acid is added to the solution, the concentration of $\text{H}^+$ ions increases. According to Le Châtelier's principle, the system will respond to this increase by shifting the equilibrium to the left to reduce the concentration of $\text{H}^+$ ions. This shift will result in more of the protonated form ($\text{HIn}$) being present in the solution.

Therefore, the addition of an acid will drive the equilibrium towards the formation of more $\text{HIn}$, causing the solution to turn yellow. This prediction aligns with the behavior of bromophenol blue as a pH indicator.

Question

To predict the direction in which the addition of an acid to a solution containing bromophenol blue will drive the equilibrium, we need to consider Le Châtelier's principle. This principle states that if a dynamic equilibrium is disturbed by changing the conditions, the position of equilibrium moves to counteract the change.

Bromophenol blue is a pH indicator that changes color depending on the pH of the solution. In acidic conditions, it typically appears yellow, and in basic conditions, it appears blue. The equilibrium can be represented as follows:

$$ \text{HIn} \rightleftharpoons \text{H}^+ + \text{In}^- $$

Where:
- $\text{HIn}$ is the protonated form (yellow).
- $\text{In}^-$ is the deprotonated form (blue).

When an acid is added to the solution, the concentration of $\text{H}^+$ ions increases. According to Le Châtelier's principle, the system will respond to this increase by shifting the equilibrium to the left to reduce the concentration of $\text{H}^+$ ions. This shift will result in more of the protonated form ($\text{HIn}$) being present in the solution.

Therefore, the addition of an acid will drive the equilibrium towards the formation of more $\text{HIn}$, causing the solution to turn yellow. This prediction aligns with the behavior of bromophenol blue as a pH indicator.

Knowee AI · Accepted Answer

To predict the direction in which the addition of an acid to a solution containing bromophenol blue will drive the equilibrium, we need to consider Le Châtelier's principle. This principle states that if a dynamic equilibrium is disturbed by changing the conditions, the position of equilibrium moves to counteract the change.

Bromophenol blue is a pH indicator that changes color depending on the pH of the solution. In acidic conditions, it typically appears yellow, and in basic conditions, it appears blue. The equilibrium can be represented as follows:

$$ \text{HIn} \rightleftharpoons \text{H}^+ + \text{In}^- $$

Where:
- $\text{HIn}$ is the protonated form (yellow).
- $\text{In}^-$ is the deprotonated form (blue).

When an acid is added to the solution, the concentration of $\text{H}^+$ ions increases. According to Le Châtelier's principle, the system will respond to this increase by shifting the equilibrium to the left to reduce the concentration of $\text{H}^+$ ions. This shift will result in more of the protonated form ($\text{HIn}$) being present in the solution.

Therefore, the addition of an acid will drive the equilibrium towards the formation of more $\text{HIn}$, causing the solution to turn yellow. This prediction aligns with the behavior of bromophenol blue as a pH indicator.

What direction do you predict the addition of an acid to the solution containing bromophenol blue will drive the equilibrium? Explain your prediction in terms of Le Châtelier's principle. Hint: Think about what the addition of an acid does to the concentration of H +ions.

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