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Quick Quiz

Quick Quiz. What are the 6 strong acids?? What are the 6 strong bases??. Give the conjugate acids of the following:. HCO 3 - NH 3 OH - SO 4 -2. Give the conjugate bases of the following:. HCO 3 - NH 3 HSO 4 - H 3 PO 4 H 2 O. Define. A Lewis Base A Bronsted Lowry acid

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Quick Quiz

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  1. Quick Quiz • What are the 6 strong acids?? • What are the 6 strong bases??

  2. Give the conjugate acids of the following: • HCO3- • NH3 • OH- • SO4-2

  3. Give the conjugate bases of the following: • HCO3- • NH3 • HSO4- • H3PO4 • H2O

  4. Define • A Lewis Base • A Bronsted Lowry acid • An Arrhenius Acid

  5. 15.4 Relative Strengths (659) • Table 15.2 p660 compares relative strengths of acids and bases. • A reaction normally goes in the direction of the weaker acid & base. • The strongest acids have the weakest conjugate bases and vice versa.

  6. Predict the direction of the reaction based on the Table 15.2: (661) • SO4-2 + HCN  HSO4- + CN- • H2S + C2H3O2- HC2H3O2 + HS-

  7. 15.5 Factors affecting acid strength (662):

  8. Polarity • The more polar bonds allow protons to be removed easier increasing the acid strength. • Across a period electronegatives increase, increasing the polarity and acid strength. • H2O<HF

  9. Bond strength • The larger the atom is which H is bonded to, the weaker the bond and thus a stronger acid. • Down a family the radius increases, decreasing the bond strength and increasing the acid strength. • HF<HCl<HBr<HI

  10. Oxoacids: H – O – Y • For a series of oxoacids of the same structure, differing only in the atom Y, the acid strength increases with the electronegativity of Y. • HIO<HBrO<HClO

  11. Multiple oxygen atoms • For a series of oxoacids, (HO)mYOn, the acid strength increases with n. The more O’s the stronger the acid. • HClO< HClO2< HClO3< HClO4

  12. Polyprotic Acids • Strength decreases as protons are lost. • HPO4-2 < H2PO4- < H3PO4

  13. HOMEWORK – OK KT? Read 15.4 - 5 p.676 Q 35- 42 odds

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