Question

Tear–free shampoos are advertised as having a pH similar to that of human tears. What pH would you expect tear–free shampoos to be?

Answer 1

Answer: 7

Explanation:

The pH of water, a neutral substance, is 7. Human tears are a saline composed mostly of water. Therefore, it stands to reason that a tear-free shampoo would have a similar pH close to 7.

Answer 2

Answer:

the pH level would be 7

Explanation: