Question 1:

What is the pH of a solution with a hydrogen ion concentration of 1 x 10^-3 M?

Explanation: The pH of a solution can be calculated using the formula pH = -log[H+]. Therefore, for a hydrogen ion concentration of 1 x 10^-3 M, the pH is 3.

Question 2:

Which of the following solutions is considered acidic?

Explanation: pH values below 7 indicate an acidic solution. Therefore, a solution with pH 1 is considered acidic.

Question 3:

What is the pH of a neutral solution?

Explanation: A neutral solution has a pH of 7. At pH 7, the concentration of hydrogen ions is equal to the concentration of hydroxide ions, resulting in a neutral solution.

Question 4:

Which of the following is NOT a characteristic of a buffer solution?

Explanation: Buffer solutions are known for maintaining a relatively constant pH and resisting changes in pH. They are typically made up of a weak acid and its conjugate base. A buffer solution can have a pH less than, equal to, or greater than 7, depending on the specific components of the buffer.

Question 5:

Which of the following is an example of a buffer solution?

Explanation: An acetic acid-sodium acetate solution is an example of a buffer solution. It consists of a weak acid (acetic acid) and its conjugate base (sodium acetate), which can resist changes in pH when small amounts of acid or base are added.