1. What is the pH of a solution whose [H3O+] is 1 X 10^ -5 M?
2. What is the [H3O+] concentration of a solution with a pH of 9?
3. What is the pH of a solution whose [H3O+] concentration is 3 X 10^-3 M?
4. What is the pH of a solution with a [H3O+] concentration of 1 X 10^ -12 M?
5.What is the [H3O+] concentration of a solution whose pH is 8.9?
1. 5
2. 1.0 x 10^-5
3. 2.5
4. 12
5. 1.26 x 10^-9
H3O+] = 4.2 x 10 -5 M. What is the ph?
To answer these questions, you need to understand the concept of pH and the relationship between pH and the concentration of hydronium ions ([H3O+]) in a solution.
1. The pH of a solution can be calculated using the formula: pH = -log[H3O+]. In this case, the given [H3O+] is 1 x 10^-5 M. To find the pH, take the negative logarithm of the concentration: pH = -log(1 x 10^-5) = 5.
2. To find the [H3O+] concentration of a solution with a pH of 9, you can use the formula: [H3O+] = 10^(-pH). In this case, pH is 9. So, [H3O+] = 10^(-9) = 1 x 10^-9 M.
3. Similar to the previous question, the pH of a solution with a given [H3O+] concentration is calculated using the formula: pH = -log[H3O+]. In this case, the given [H3O+] is 3 x 10^-3 M. Taking the negative logarithm gives: pH = -log(3 x 10^-3) = 2.52.
4. The pH can be calculated using the formula pH = -log[H3O+]. In this case, the given [H3O+] is 1 x 10^-12 M. Substituting the value into the formula gives: pH = -log(1 x 10^-12) = 12.
5. To find the [H3O+] concentration of a solution with a given pH, you can use the formula: [H3O+] = 10^(-pH). In this case, the given pH is 8.9. So, [H3O+] = 10^(-8.9) = 1.26 x 10^-9 M.
By understanding the concept of pH and knowing the formulas to calculate pH and [H3O+] concentration, you can easily answer these questions.
pH = -log(H3O^+) and
(H3O^+)(OH^-) = Kw = 1E-14
will work all of these.