Final answer:
The concentration of hydronium ions in a solution with a pH of 6.3 is approximately 5.0 × 10^(-7) M.
Step-by-step explanation:
The pH of a solution describes its acidity or basicity. A pH of 6.3 indicates that the solution is slightly acidic. To find the concentration of hydronium ions ([H3O+]), you can use the formula pH = -log[H3O+].
Plugging in the pH value of 6.3 into the formula, we get:
pH = -log[H3O+]
6.3 = -log[H3O+]
To solve for [H3O+], we take the antilog of both sides:
[H3O+] = 10^(-pH)
Therefore, the concentration of hydronium ions in a solution with a pH of 6.3 is [H3O+] = 10^(-6.3), which is approximately 5.0 × 10^(-7) M.