Table of Contents
pH Change by Common Ion in Case of Weak Acids and Weak Bases Experiment ;
In this experiment, we will investigate the pH change by common ions in case of weak acids and weak bases.
We will use 0.1 M solutions of acetic acid (CH3COOH) and ammonia (NH3) as our weak acids and weak bases, respectively. We will also use 0.1 M solutions of sodium acetate (CH3COO¯Na+), ammonium chloride (NH4Cl), and sodium chloride (NaCl) as our common ions.
We will start by measuring the pH of each of the solutions. We will then add a small amount of sodium acetate to the acetic acid solution and observe the pH change. We will then add a small amount of ammonium chloride to the ammonia solution and observe the pH change.
We will then repeat the same procedure with the sodium chloride solution. We will observe the pH change when a small amount of sodium chloride is added to the acetic acid solution, the ammonia solution, and the sodium acetate solution.
We will then graph the pH change versus the concentration of the common ion for each of the three solutions.
The pH of Weak Acid and Weak Base
The pH of weak acids and weak bases is determined by the concentration of the acid or base and the dissociation constant, Ka or Kb. The pH of a weak acid is the negative of the logarithm of the acid’s concentration divided by the acid’s dissociation constant. The pH of a weak base is the negative of the logarithm of the base’s concentration divided by the base’s dissociation constant.
Experiment on the pH of Weak Acid and Weak Base
A weak acid and weak base are two types of solutions that have a low concentration of hydrogen ions (H+) and hydroxide ions (OH-), respectively. In this experiment, you will use a pH meter to measure the pH of solutions of a weak acid and a weak base.
First, you will need to prepare a solution of a weak acid. To do this, you will need to dissolve 1.00 g of acetic acid (CH3COOH) in 100.0 mL of water. Next, you will need to prepare a solution of a weak base. To do this, you will need to dissolve 1.00 g of ammonium chloride (NH4Cl) in 100.0 mL of water.
Now, you are ready to measure the pH of the solutions. To do this, you will need to connect the pH meter to a computer and download the software that comes with the meter. Next, you will need to calibrate the pH meter. To do this, you will need to use a pH 7.00 buffer solution.
Now, you are ready to measure the pH of the solutions. To do this, you will need to first measure the pH of the solutions without any indicator. Next, you will need to add a few drops of indicator to each solution and measure the pH again.
The results of this experiment will show that the pH of a solution of a weak acid is lower than the pH
The Change in pH Level of a Solution for Weak Acid with Common Ion Effect:
The change in pH level of a solution for weak acid with common ion effect is the addition of a strong acid to a weak acid solution. The addition of the strong acid will cause the pH level of the solution to decrease.
The Change in pH Level of a Solution for Weak Base with Common Ion
The pH level of a weak base with a common ion will change depending on the concentration of the common ion. If the concentration of the common ion increases, the pH level of the solution will decrease. If the concentration of the common ion decreases, the pH level of the solution will increase.
