Question

The pH of a juice drink is 2.8. How do you find the concentration of hydrogen ions in the drink, in simplest form?

Answer 1

`2 xx 10^(-3) M`

Explanation:

In the simplest terms, to calculate `[H^+]` from `pH`, you use the equation `[H^+] = 10^(-pH)`; `10` to the power of the negative of the `pH`. So, `[H^+] = 10^(-2.8) = 2 xx 10^(-3) M` (appropriate number of significant digits).