pH Scale related

Why we maintain pH scale between 0 to 14? why not below Zero or upper then 14?

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As you must be knowing that PH is a numerical figure obtained by logarithmic calculation. It is - log (H+) means Negative log of Hydrogen ion concentration in aqueous solution containing water (H2O).

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it is possible to get a product having pH more than 14…

how too calebrate ph meter only 3 buffer solution

Take three buffer solutions which are 1.68,4.01 and 6.86 and calibrate the ph meter.

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You have to select Acid-Base mode then take pre -prepared pH buffer i.e 4.01, 7.02 & 9.2.

You have to select three point mode after this Acid-Base mode then take pre -prepared pH buffer i.e 4.01, 7.02 & 9.2.

Water disassociation constant is 14 hence ph scale also 1To 14

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