how do I caluclate (H3O+) in a solution if the PH is the following 1.81
pH = -log(H3O^+)
1.81 = -log(H3O^+).
Rearrange to -1.81 = log(H3O^+). Now
punch in -1.81 on your calculator (or 1.81 and hit the change sign button to make -1.81) then hit the 10x button. That will return 0.01549 and you can round that to 0.015 to two significant figures (two are allowed with the 1.81.)
To calculate the concentration of H3O+ in a solution given the pH, you can use the equation:
pH = -log[H3O+]
First, rearrange the equation to solve for [H3O+]:
[H3O+] = 10^(-pH)
Now, substitute the pH value into the equation:
[H3O+] = 10^(-1.81)
Using a calculator, evaluate the expression:
[H3O+] ≈ 1.29 × 10^(-2) M
Therefore, the concentration of H3O+ in the solution is approximately 1.29 × 10^(-2) M.
To calculate the concentration of the hydrogen ion (H3O+) in a solution based on the given pH value of 1.81, you can use the equation:
pH = -log[H3O+]
Rearranging the equation, you have:
[H3O+] = 10^(-pH)
Now, substitute the given pH value in the equation:
[H3O+] = 10^(-1.81)
Using a scientific calculator, calculate 10^(-1.81) which equals approximately 0.018 M (molar).
Therefore, the concentration of H3O+ in the solution is approximately 0.018 M.