Understand pH scale. Click on the link to Watch the VIDEO explanation:
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Historical Background of pH scale. Read on for more. The pH values of common substances range from 0 to 14. The value of 7 on pH scale is Neutral. Pure water and all aqueous solutions with pH equal to 7 at 25 degree Celsius are neutral. If less than 7 in pH scale a given solution is acidic and if the pH is more than 7 it is basic. Note: keep in mind that because pH is on a logarithmic scale, every unit change in pH represents a tenfold change in hydronium ion concentration, thus, lemon juice is approximately ten times as acidic as orange juice and about 100 times more acidic than tomato juice. pH of a given substance can be measured using pH meters or indicator papers.
Watch Video
Historical Background of pH scale. Read on for more. The pH values of common substances range from 0 to 14. The value of 7 on pH scale is Neutral. Pure water and all aqueous solutions with pH equal to 7 at 25 degree Celsius are neutral. If less than 7 in pH scale a given solution is acidic and if the pH is more than 7 it is basic. Note: keep in mind that because pH is on a logarithmic scale, every unit change in pH represents a tenfold change in hydronium ion concentration, thus, lemon juice is approximately ten times as acidic as orange juice and about 100 times more acidic than tomato juice. pH of a given substance can be measured using pH meters or indicator papers.
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