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In chemistry, the acidity of a solution is measured using the pH scale. This scale quantifies the concentration of hydrogen ions (H+) in a liquid. Pure water has a neutral pH of 7. Solutions with a pH less than 7 are acidic, while those with a pH greater than 7 are basic or alkaline. Stronger acids have higher hydrogen ion concentrations and lower pH values, closer to 0, whereas stronger bases have higher hydroxide ion concentrations and pH values closer to 14. The pH scale is crucial in various fields, including agriculture, to determine soil suitability for different crops.1234

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