Rinse the area of the pH Meter originally covered by the pro

Rinse the area of the pH Meter originally covered by the protective cap with distilled water. Dry it with tissue. Place the protective cap on pH meter. Flush the contents of the beaker into the sink and rinse the beaker thoroughly with tap Water Return the pH meter chemicals and the breaker their proper locations If the pH of the distilled water turned out to be 7, what would the proton concentration be? Was the proton concentration of the distilled water higher or lower than that of the distilled water +2 drops of acid? Which was more acid? Which more alkaline (basic)?

Solution

Please find the answers below:

Part 1: It is very well known that the pH of a solution is defined as negative logarithm base of proton ion concentration i.e.,

pH = -log[H+]

According to the question, the pH of a solution is 7. This gives that the proton ion concentration of the solution will be 10^-7 because only then the -log of [H+] will give a positive value of 7.

Part 2: It is very well known that pH of an acid is always lower than that of neutral solution. Thus, the pH of distilled water with +2 drop of acid will be undoubtedly lower than that of neutral water. However, if volume of water is too high, then the protons will dissolute in the water and net pH will not show much significant difference. However, due to presence of less amount of protons, the solution will be considerd as acidic with pH 6.99. On the contrary, the distilled water will be slightly basic in nature with respect to the acidic water.