Question

Write down the theory regarding pH measurement of an unknown solution.​

Answer 1

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The formal definition of pH is the negative logarithm of the hydrogen ion concentration (i.e., pH = –log10[H+]). In practice, it is the hydrogen ion activity that is measured, rather than its concentration. ... This means that, in theory, the pH sensor will change its output by 59 mV for every change in a pH unit.

Answer 2

Regarding pH measurement of

an unknown solution.

$Verified Answer✔$

➪Take the Litmus Test

If your lab has litmus paper, you can use it to determine your solution's pH. When you place a drop of a solution on the litmus paper, the paper changes color based on the pH of the solution. Once the color changes, you can compare it to the color chart on the paper's package to find the pH.