What is the molar hydronium ion concentration in solutions with pH values of a) 3.45 and b) 10.290. How do you work these problems?
With the definition.
pH = -log(H^+)
substitute and solve.
To determine the molar hydronium ion concentration (H3O+) in solutions with specific pH values, you can use the reverse mathematical relationship between pH and H3O+ concentration.
The relationship is given by the equation:
pH = -log[H3O+]
To find the H3O+ concentration, you need to rearrange the equation:
[H3O+] = 10^(-pH)
Now, let's plug in the pH values provided:
a) pH = 3.45
[H3O+] = 10^(-3.45)
Using a scientific calculator, evaluate 10^(-3.45) to find the answer. The result will be the molar hydronium ion concentration (in moles per liter) for this solution.
b) pH = 10.290
[H3O+] = 10^(-10.290)
Again, using a scientific calculator, evaluate 10^(-10.290) to find the answer. This will give you the molar hydronium ion concentration in moles per liter for this solution.
Remember that the concentration units are in moles per liter (M).