Answer:
A. The pH is 4.66
B. The pH is 3.44
C. The pOH is 11.54
Explanation:
A. Data obtained from the question include:
Hydrogen ion concentration, [H+] = 2.17x10^-5 M
pH =.?
pH is simply defined as the negative logarithm of the hydrogen ion concentration. Mathematically, it is expressed as:
pH = - log [H+]
With the above formula, we can calculate the pH of the solution as follow:
pH = - log [H+]
[H+] = 2.17x10^-5 M
pH = - log 2.17x10^-5
pH = 4.66
Therefore, the pH of the solution is 4.66.
B. Data obtained from the question include:
pOH = 10.56
pH =.?
The pH and the pOH of a solution are related with the following equation:
pH + pOH = 14
Thus, with the above equation, we can obtain the pH of the solution as illustrated below:
pH + pOH = 14
pOH = 10.56
pH + 10.56 = 14
Collect like terms
pH = 14 - 10.56
pH = 3.44
Therefore, the pH of the solution is 3.44.
C. The following data were obtained from the question:
Hydrogen ion concentration, [H+] = 3.48x10^-3 M
pOH =.?
First, we shall determine the hydroxide ion concentration, [OH-] in the solution.
This is illustrated below:
[H+] x [OH-] = 1x10^-14 M²
[H+] = 3.48x10^-3 M
3.48x10^-3 M X [OH-] = 1x10^-14 M²
Divide both side by 3.48x10^-3 M
[OH-] = 1x10^-14 M²/3.48x10^-3 M
[OH-] = 2.87x10^-12 M
Now, we can determine the pOH of the solution as follow:
pOH = - log [OH-]
[OH-] = 2.87x10^-12 M
pOH = - log 2.87x10^-12
pOH = 11.54.
Therefore, the pOH of the solution is 11.54.
