Question

Lemon juice has a pH of about 2.0, compared with a pH of about 1.0 for stomach acid. Therefore, the concentration of H+ in stomach acid is __________ than that of lemon juice.

Answer 1

The concentration of H⁺ in stomach acid is approximately ten times greater than that of lemon juice.

Step-by-step explanation:

The H⁺ concentration of a solution is exponentially related to its pH value:

`\rm [H^(+)] = 10^(-pH)`.

For lemon juice:

`\rm [H^(+)] = 10^(-2.0) = 0.01\; M`.

For stomach acid:

`\rm [H^(+)] = 10^(-1.0) = 0.1\; M`.

Thus, the concentration of H⁺ in stomach acid is approximately ten times greater than that of lemon juice.