Question

Which of the following correctly lists the substances from highest to lowest pH?
A) lemon juice, distilled water, milk of magnesia
B) distilled water, milk of magnesia, lemon juice
C) lemon juice, milk of magnesia, distilled water
D) milk of magnesia, distilled water, lemon juice

Answer 1

To determine the correct order of substances from highest to lowest pH, we need to consider the typical pH values of each substance:

1. **Lemon juice** has a low pH (acidic), typically around 2-3.
2. **Distilled water** has a neutral pH of around 7.
3. **Milk of magnesia** (magnesium hydroxide) is basic and has a high pH, typically around 10-11.

Based on these pH values, the order from highest to lowest pH would be:

- Milk of magnesia (highest)
- Distilled water (neutral)
- Lemon juice (lowest)

Thus, the correct answer is:

**D) milk of magnesia, distilled water, lemon juice**.