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Strong and Weak Acids

Strong and Weak Acids. Ionization of HCl and formation of hydronium ion, H 3 O +. H 2 O + HCl . H 3 O + + Cl -. Proton acceptor. Proton donor. Strong Acids vs. Weak Acids. Strong acids are assumed to be 100% ionized in solution (good proton donors). HCl. H 2 SO 4. HNO 3.

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Strong and Weak Acids

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  1. Strong and Weak Acids

  2. Ionization of HCl and formation of hydronium ion, H3O+ H2O + HCl  H3O+ + Cl- Proton acceptor Proton donor

  3. Strong Acids vs. Weak Acids Strong acids are assumed to be 100% ionized in solution (good proton donors). HCl H2SO4 HNO3 Weak acids are usually less than 5% ionized in solution (poor proton donors). H3PO4(Often classed AsStrong) Organic acids HC2H3O2(Acetic)

  4. Strong Acid Dissociation

  5. Weak Acid Dissociation

  6. Organic Acids Organic acids all contain the “carboxyl” group, sometimes several of them. The carboxyl group is a poor proton donor, so ALL organic acids are weak acids.

  7. Examples of Organic Acids • Citric acid in citrus fruit • Malic acid in sour apples • Deoxyribonucleic acid, DNA • Amino acids, the building blocks of protein • Lactic acid in sour milk and sore muscles • Butyric acid in rancid butter

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