What is the hydroxide concentration if the hydronium is .03 M?
(H^+)*(OH^-) = Kw = 1 x 10^-14
Plub is for H and solve for OH.
To determine the hydroxide concentration, we need to know the relationship between hydronium ions (H3O+) and hydroxide ions (OH-) in water. In water, H3O+ and OH- ions are related by the concept of the pH scale.
The pH scale is a measure of the concentration of H3O+ ions in a solution. It ranges from 0 to 14, where a pH of 7 is considered neutral (indicating an equal concentration of H3O+ and OH- ions), pH values less than 7 are acidic (indicating a higher concentration of H3O+ ions), and pH values greater than 7 are basic (indicating a higher concentration of OH- ions).
The concentration of hydroxide ions (OH-) can be calculated using the equation:
OH- concentration = 10^(-pOH)
Where pOH is the negative logarithm of the hydroxide ion concentration. The pOH is related to the pH by the equation:
pOH = 14 - pH
Given that the hydronium ion concentration (H3O+) is 0.03 M, we can calculate the pH using the expression:
pH = -log10([H3O+])
Substituting the given value:
pH = -log10(0.03)
Calculating this expression using a scientific calculator, we find that pH is approximately 1.52.
Now we can calculate the pOH by subtracting the pH from 14:
pOH = 14 - 1.52
The pOH is approximately 12.48.
Finally, to determine the concentration of hydroxide ions (OH-), we substitute the pOH value into the equation:
OH- concentration = 10^(-pOH)
OH- concentration = 10^(-12.48)
Using a calculator, the concentration of hydroxide ions is approximately 3.14 x 10^(-13) M.
Therefore, the hydroxide concentration is approximately 3.14 x 10^(-13) M.