Explain the difference between acid and alkali
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An acid is a substance that has a pH lower than 7. For example, hydrochloric acid, sulphuric acid, citric acid, ethanoic acid (vinegar). A base is a substance that neutralises an acid – those that dissolve in water are called alkalis. An alkali is a soluble substance with a pH higher than 7.
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Explanation:
Acid turns Blue litmus red
They are sour in taste
Eg Lemon, Orange etc
An alkali is a base that is soluble in water
They are corrosive
Eg KOH
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