Question

The concentration oh hydrogen ion in a sample of soft drink is 3.8×10^-3 m. What is its ph?

Answer 1

`pH=-log_10[H_3O^+]=-log_10(3.8xx10^-3)=-(-2.42)=2.42`

Explanation:

This `pH` is rather on the low side....the drink is as acid as buggery, and would not do your teeth any good. We do experiments in the lab with Coke, and classic coke and we have recorded measurements as acidic as `pH=1.90`.

Most things that taste good, i.e. wine, cheese, tomatoes, lemons, are quite acidic. On the other hand, the most basic thing we eat is quite probably egg white, `pH=7-9`. The soapy, sliminess of egg white is quite typical of a base.