Moist sodium bicarbonate was placed on a strip of pH paper. The colour of the strip

Options

A. turned blue
B. did not change
C. turned green
D. turned light pink

Explanation

To determine the pH of moist sodium bicarbonate using pH paper, we can follow these steps:

### Step-by-Step Solution:

1. **Understanding Sodium Bicarbonate**: Sodium bicarbonate (NaHCO₃) is a salt that is commonly known as baking soda. It is a weak base.

2. **Moistening the Sodium Bicarbonate**: When sodium bicarbonate is moist, it can dissolve slightly in water, forming a solution that can be tested with pH paper.

3. **Using pH Paper**: pH paper is a tool that changes color based on the acidity or basicity of a solution. The color change indicates the pH level of the solution.

4. **Testing the Solution**: Place the moist sodium bicarbonate on the pH paper. Observe the color change that occurs on the pH paper.

5. **Interpreting the Color Change**: Since sodium bicarbonate is a weak base, the pH paper will likely change to a color that indicates a basic pH (usually above 7).

6. **Conclusion**: The color of the pH paper will indicate that the solution is basic due to the presence of sodium bicarbonate.

### Final Answer:
The color of the strip will indicate a basic solution.

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