Which row of the table shows the effects of dissolving carbon dioxide in water?
| pH | Acidity |
|------------|--------------|
| A - HSC - SSCE Biology - Question 8 - 2010 - Paper 1
Question 8
Which row of the table shows the effects of dissolving carbon dioxide in water?
| pH | Acidity |
|------------|--------------|
| A. Increases| Increase... show full transcript
Worked Solution & Example Answer:Which row of the table shows the effects of dissolving carbon dioxide in water?
| pH | Acidity |
|------------|--------------|
| A - HSC - SSCE Biology - Question 8 - 2010 - Paper 1
Step 1
pH and Acidity relationship
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Answer
When carbon dioxide dissolves in water, it forms carbonic acid (H₂CO₃), which can dissociate into bicarbonate (HCO₃⁻) and hydrogen ions (H⁺). The increase in hydrogen ions decreases the pH, indicating that the acidity of the solution increases.
Step 2
Correct option identification
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Answer
Given the options:
A. Increases pH, Increases Acidity
B. Decreases pH, Decreases Acidity
C. Decreases pH, Increases Acidity
D. Increases pH, Decreases Acidity
Only option C reflects that the pH decreases and acidity increases, which aligns with the expected chemical behavior of dissolving carbon dioxide in water.
