(e) What do you mean by pH?
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pH is a measure of how acidic/basic water is. The range goes from 0 to 14, with 7 being neutral. pHs of less than 7 indicate acidity, whereas a pH of greater than 7 indicates a base. pH is really a measure of the relative amount of free hydrogen and hydroxyl ions in the water.
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It means amount of acidity or basicity in a solution. acids have their ph below 7 while bases have ph above 7 and salts have ph 7
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