Question: What is the pH of a 0.1 M solution of sodium bicarbonate (NaHCO3)?
Options:
7.5
8.4
9.0
6.0
Correct Answer: 8.4
Solution:
NaHCO3 is a weak base; its pH is around 8.4.
What is the pH of a 0.1 M solution of sodium bicarbonate (NaHCO3)?
Practice Questions
Q1
What is the pH of a 0.1 M solution of sodium bicarbonate (NaHCO3)?
7.5
8.4
9.0
6.0
Questions & Step-by-Step Solutions
What is the pH of a 0.1 M solution of sodium bicarbonate (NaHCO3)?
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 partially dissociates into sodium ions (Na+) and bicarbonate ions (HCO3-).
Step 3: Know that bicarbonate ions can react with water to form hydroxide ions (OH-) and carbonic acid (H2CO3), 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 8.4.
Step 5: Conclude that the pH of the 0.1 M sodium bicarbonate solution is approximately 8.4.
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