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Question (Clickers)

Question (Clickers). Which of the following does not belong: Acids... ...turn litmus paper pink. ...taste sour. ...feel slippery. ...decrease the pH when dissolved in water. Question (Clickers). Which of the following does not belong: Bases... ...turn litmus paper blue. ...taste sour.

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Question (Clickers)

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  1. Question (Clickers) • Which of the following does not belong: • Acids... • ...turn litmus paper pink. • ...taste sour. • ...feel slippery. • ...decrease the pH when dissolved in water.

  2. Question (Clickers) • Which of the following does not belong: • Bases... • ...turn litmus paper blue. • ...taste sour. • ...feel slippery. • ...increase the pH when dissolved in water.

  3. Questions (Clickers) • The conjugate base for HCl is • Cl- • NaCl • OH- • HCl

  4. Questions (Clickers) • The conjugate acid for H2PO4- is • HPO42- • H3PO4 • H3O+ • HCl

  5. Questions (Clickers) • In the following reaction • species A is the • acid in the forward direction. • base in the forward direction. • acid in the reverse direction. • base in the revers direction.

  6. Questions (Clickers) • In the following reaction • species C is the • acid in the forward direction. • base in the forward direction. • acid in the reverse direction. • base in the revers direction.

  7. Question • Write the equilibrium constant expression for the following reaction:

  8. Question • Write the equilibrium constant expression for the following reaction:

  9. Question • When steam is passed over coal and allowed to come to equilibrium at 800°C, the equilibrium constant for the reaction has a value of 8.1 x 10-2. • Explain why the concentration of water appears in the equilibrium constant expression for this reaction, when it is usually omitted from such equations. • Write the equilibrium constant expression for the reaction. • Which are there more of at equilibrium, reactants or products?

  10. Question (Clicker) • Hydrochloric acid, HCl, is a strong acid. What is the pH of a 0.001 M solution of HCl? • 0.001 • 3.0 • 1 x 10-3 • 100

  11. Question (Clicker) • Hydrochloric acid, HCl, is a strong acid. What is the pH of a 2.35 x 10-4 M solution of HCl? • 2.35 • 4.0 • 100 • 3.63

  12. Question (Clickers) • Using the data in Table 9.4, which of the following is the strongest acid? • HCO3- • CH3COOH • NH4+ • HF

  13. Question (Clickers) • Using the data in Table 9.4, which of the following is the strongest base? • HCO3- • CH3COO- • NH3 • F-

  14. Question • If 35.0 mL of 0.250 M KOH are required to titrate 45.0 mL of a HCl solution, what is the concentration of the HCl solution?

  15. Questions (Clicker) • Adding NaOH to an acetate buffer will lead to the increase in the concentration of which of the following components. • CH3COOH • CH3COO- • H3O-

  16. Questions • A buffer can be prepared using lactic acid and its conjugate base, lactate. • At what pH does the lactate buffer system buffer best at? • Write an equation for the reaction that takes place when a strong acid (H3O-) is added to this buffer. • Write equations for the reactions that take place when a strong base (OH-) is added to this buffer.

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