Question

Need help with a lab:
3. Determining the pH of substances such as purple grape juice and catsup using test strips can be difficult. Why?

Answer 1

anyone?

Answer 2

I think that would be because the liquids themselves have a distinctive color.

Answer 3

but how would that make it difficult ?

Answer 4

Because test strips are read by color.

Answer 5

but there are other liquids with similar colors

Answer 6

And those would also be hard to test for pH using strips.

Answer 7

but its talking about catsup and grape juice specifically...

Answer 8

I think it just means substances that have distinctive colors.

Answer 9

oh ok thanks