The BR0NSTED-LOWRY ACID-BASE THEORY

In 1923, Johannes Br nsted and his English counterpart Thomas Lowry independently developed a more general acid-base theory. According to the Br nsted-Lowry model, an acid is a proton (H+) donor and a base is a proton acceptor. Each proton donor (acid) has its pair (conjugate) proton acceptor (base). In an acid-base reaction, H (proton) is transferred from an acid to a base. For example  

NH3 and NH form a conjugate acid-base pair, where NH3 is the conjugate base of NH is the conjugate acid of NH3). Similarly, H2O and OH are 

Find the conjugate acid-base pairs for the above reaction. 

H2S gives H (proton) to H2O (proton acceptor), so it is an acid. In the same way, H2O accepts one H (proton) from H2S (proton donor). Thus, it is a base. 

Danish chemist. In 1923, he introduced a widely explicable acid— base concept simultaneously with Thomas Martin Lowry. He was also cm authority on catalysis of acids and bases. 

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