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.

Question

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

To determine the color the grape juice will turn in baking soda and vinegar, we can use the information we have from the other substances:

• Ammonia turned the grape juice green, indicating that it is a basic substance (high pH).
• Lemon juice turned the grape juice red, indicating that it is an acidic substance (low pH).
• Vinegar, like lemon juice, is also acidic, so we can expect it to turn the grape juice red as well.
• Baking soda is basic as well, so it will also turn the grape juice green.

In summary:

• Baking Soda: Green (because it is basic)
• Vinegar: Red (because it is acidic)