A [H]can be used to measure pH values accurately with decimal place shown. We should [I] it before use. It is done by adjusting the readings in solutions of known pH values.

The pH of a solution can be measured using an electronic device called a .

What could the student use to measure the pH of pure water?

(a) Using the expression 𝐾𝑎=[H+][A−][HA], explain how to determine which solution has the lower pH, 0.10𝑀HF(𝑎𝑞) or 0.10𝑀HC2H3O2(𝑎𝑞). Do not perform any numerical calculations.

pH scale is a measure of the amount of a particle called [J] in the aqueous solutions. A solution of pH 7 contains [K] times more this particle than one of pH 9.

How is pH calculated?Question 2Select one:a.log[H33O++]b.−log−log[OH−−]c.−log−log[H33O++]d.log[OH−−]