What is the (a) H+ ion concentration, (b) pH, (c) OH- ion concentration, and (d) pOH of a 0.001 M solution of HCl?
See your first question. Done the same way for pH.
For pOH, solve for pH, then pH + pOH = 14
(H^+) for strong acids like HNO3 and HCL, the H^+ = HCl or HNO3
To find the answers to these questions, we need to understand some basic concepts in chemistry.
(a) H+ ion concentration:
In chemistry, the concentration of H+ ions is given by the concentration of the acid in a solution. Since HCl is a strong acid that fully dissociates in water, the concentration of H+ ions will be equal to the concentration of HCl. Therefore, the H+ ion concentration in a 0.001 M solution of HCl is also 0.001 M.
(b) pH:
pH is a measure of the acidity or basicity of a solution. It is defined as the negative logarithm (base 10) of the H+ ion concentration. To find the pH, we can use the formula: pH = -log[H+]. Plugging in the concentration of H+ ions from part (a), we can calculate the pH: pH = -log(0.001) = 3.
(c) OH- ion concentration:
The concentration of OH- ions can be found using the concept of the self-ionization of water. In water, a small fraction of water molecules undergo self-ionization to produce H+ and OH- ions. Since water has an equal number of H+ and OH- ions in a neutral solution, we can assume the concentration of H+ ions and OH- ions to be equal. Therefore, the OH- ion concentration in a 0.001 M solution of HCl is also 0.001 M.
(d) pOH:
pOH, similar to pH, is a measure of the basicity or acidity of a solution. It is defined as the negative logarithm (base 10) of the OH- ion concentration. To find the pOH, we can use the same formula used for pH: pOH = -log[OH-]. Plugging in the concentration of OH- ions from part (c), we can calculate the pOH: pOH = -log(0.001) = 3.
So, the answers are:
(a) H+ ion concentration = 0.001 M
(b) pH = 3
(c) OH- ion concentration = 0.001 M
(d) pOH = 3