The H3o+ concentration of a solution is found to e 3.40*10^-6. What is the pH of the solution? what is the H3O+ concentration? what is the OH- concentration? is this and acidor a base?
pH = -log(H3O^+)
(H3O^+) = 3.40E-6
(H3O^+) + (OH^-) = Kw = 1E-14. You know Kw and (H3O^+); solve for (OH^-).
To find the pH of the solution, you need to use the equation pH = -log[H3O+]. In this case, the H3O+ concentration is given as 3.40 * 10^-6.
To find the pH:
1. Take the negative logarithm of the H3O+ concentration:
-log(3.40 * 10^-6)
Note: The base of the logarithm is 10.
2. Calculate the logarithm of the concentration:
-log(3.40 * 10^-6) = -log(3.40) + (-log(10^-6))
Since log(10^-6) = -6:
-log(3.40) - (-6) = -log(3.40) + 6
Calculate the value of -log(3.40) + 6 using a calculator to get the pH of the solution.
Now, let's find the H3O+ concentration:
The H3O+ concentration is given as 3.40 * 10^-6.
The OH- concentration can be calculated using the equation Kw = [H3O+][OH-] = 1.0 * 10^-14 (at 25 °C). Since the solution is at equilibrium, the [H3O+] and [OH-] concentrations are equal.
Therefore, [H3O+] = [OH-].
To find the OH- concentration:
1. Set up the equation using the H3O+ concentration:
[H3O+] * [OH-] = 1.0 * 10^-14
Since [H3O+] = [OH-]:
[H3O+]^2 = 1.0 * 10^-14
2. Take the square root of both sides:
[H3O+] = √(1.0 * 10^-14)
Calculate the square root using a calculator to get the H3O+ concentration.
Based on the H3O+ concentration, we can determine whether the solution is acidic or basic:
If the H3O+ concentration is higher than the OH- concentration, the solution is acidic. If the H3O+ concentration is lower than the OH- concentration, the solution is basic. And if the H3O+ concentration is equal to the OH- concentration, the solution is neutral.
Therefore, compare the H3O+ concentration and OH- concentration to determine whether the solution is an acid or a base.