Final answer:
The incorrect matching of pH or pOH with its description is option c. pOH = 7.8 - slightly acidic.
Step-by-step explanation:
The incorrect matching of pH or pOH with its description is option c. pOH = 7.8 - slightly acidic.
According to the pH scale, values of pH below 7 are acidic, values above 7 are basic, and a pH of 7 is considered neutral. The pOH scale is the opposite, with values below 7 being basic, values above 7 being acidic, and a pOH of 7 being neutral. In option c, a pOH of 7.8 is described as slightly acidic, which is incorrect since a pOH value above 7 is basic, not acidic.