Question

Jemele adds grape juice to four samples of household substances. Grape juice turns red in a solution with a low pH and green in a solution with a high pH. Some of her data is recorded in the table below:
Substance | Color of Grape Juice
ammonia | green
baking soda | ?
lemon juice | red
vinegar | ?
What color will the grape juice turn in baking soda or vinegar, and why?

Answer 1

In the table you've provided, the color changes of the grape juice indicate the pH levels of the substances tested:

- Ammonia is green, indicating it has a high pH (alkaline).
- Lemon juice is red, indicating it has a low pH (acidic).

Now, for the other two substances:

1. **Baking Soda**: Baking soda is a basic substance, which means it also has a high pH. Like ammonia, it is expected to turn the grape juice green due to its alkaline nature.

2. **Vinegar**: Vinegar is an acidic substance, meaning it has a low pH. Therefore, it will turn the grape juice red, similar to lemon juice.

To summarize:
- The grape juice will turn green in baking soda (high pH).
- The grape juice will turn red in vinegar (low pH).