Maharashtra BoardEnglish MediumSTD 12 ScienceChemistryIonic Equilibria2 Marks
Question
Explain Bronsted-Lowry theory of acids and bases.
✓
Answer
Acid : According to Bronsted-Lowry theory acid is a substance that donates a proton $\left( H ^{+}\right)$to another substance. Base : According to this theory base is a substance that accepts a proton $\left( H ^{+}\right)$from another substance. For example, $\underset{\text { Acid }}{ HCl _{(\text {aq) }}}+\underset{\text { Base }}{ NH _{3(\text {aq) }}}{ } \rightleftharpoons NH _{4(\text {aq})}^{+}+ Cl _{(\text {aq) }}^{-}$
Since $HCl$ donates a proton it is an acid while $NH _3$ accepts a proton it is a base.
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