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Miisaanka pH iyo xal u dhigma (universal indicator)
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Muuji qoraalka
Most acids and alkalis are colourless solutions, so indicators can be used to identify them.
pH stands for ‘potential of hydrogen’ and acids contain hydrogen.
The higher the concentration of hydrogen, the lower the pH.
The pH scale goes up and down in factors of ten, so an acid of pH 2 is ten times more acidic than pH 3.
A low pH means acidic, a high pH means alkaline and solutions with a pH of 7 are neutral.