C401Ch15LN1 - Chemistry 401 Folsom Lake College Dr Samples...

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Chemistry 401 Folsom Lake College Dr Samples Chapter 15: Acids & Bases and Aqueous Equilibrium What are Acids and Bases? Arrhenius Theory (a very old theory) An acid is a substance which produces H + in water. A base is a substance which releases or produces OH - in water. The Arrhenius theory was very limiting as the acid/base must be in water; and Arrhenius bases had to contain OH-. By this theory, ammonia, NH 3 , is not a base. Brønsted-Lowry Theory • An acid is a substance which donates H + in water: a proton-donor. • A base is a substance which accepts H + in water: a proton-acceptor. This means that the acid and base react together in a proton-transfer rxn. This also means that the 2 products are ALSO an acid and a base. Look at the reverse rxn: So the acid HA and the base A - differ by a proton, H + HA and A - are called a conjugate acid-base pair. A- is the conjugate base of HA • Also, HB + is the conjugate acid of B
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This note was uploaded on 06/25/2008 for the course CHEM 400-401 taught by Professor Dr.samples during the Fall '06 term at American River.

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C401Ch15LN1 - Chemistry 401 Folsom Lake College Dr Samples...

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