What is the pH of a 0.1 M solution of sodium bicarbonate (NaHCO3)? (2022) 2022

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Question: What is the pH of a 0.1 M solution of sodium bicarbonate (NaHCO3)? (2022) 2022

Options:

Correct Answer: 8.00

Exam Year: 2022

Solution:

NaHCO3 is a weak base, pH ≈ 8.00 due to its bicarbonate ion acting as a weak base.

What is the pH of a 0.1 M solution of sodium bicarbonate (NaHCO3)? (2022) 2022

What is the pH of a 0.1 M solution of sodium bicarbonate (NaHCO3)? (2022) 2022

Step 1: Understand that sodium bicarbonate (NaHCO3) is a compound that can act as a weak base in water.
Step 2: Recognize that when NaHCO3 dissolves in water, it produces bicarbonate ions (HCO3-).
Step 3: Know that bicarbonate ions can accept protons (H+) from water, which makes the solution slightly basic.
Step 4: Use the concentration of the solution (0.1 M) to estimate the pH. A 0.1 M solution of a weak base like NaHCO3 typically has a pH around 8.00.
Step 5: Conclude that the pH of the 0.1 M sodium bicarbonate solution is approximately 8.00.

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