Chemistry 106-2000-Quiz 3

Chemistry 106-Fundamental Chemistry Name .Quiz 3a-Thursday, 13 April 2000 Laboratory Section .Answer in the space provided. Show work whenever possible. If you have a question raise yourhand. If you finish early you may leave but do so quietly without disturbing others around you.Use a pen.1. (5 points) Place the most appropriate term in the space provided.________________________________ is the reaction of an ionic species with water to form eithera conjugate acid or conjugate base. This natural phenomenon is another example of a chemicalequilibrium. If the reaction produces an acid, the distribution of the components of the equilibriumsystem may be quantified by an acid ionization constant, or K a . This constant multiplied by the______________________ ____________________________ constant for any weak acidconjugatebase pair will give the ________________ ___________________________ constant(at 25 ˚C). It is the rearrangement of this expression that mathematically allows for thesimplification of calculations for buffered solutions. This simplification is known as theHenderson-Hasselbalch equation, an equation which relates the pH (or pOH) and equilibriumconcentrations of a __________________ ___________________ (or weak base) with the productanion (or cation) and the _____________ for the reaction.2. (5 pts) Classify each of the following as a strong acid (SA), weak acid (WA), strong base(SB), weak base (WB), non-metal oxide (NMO), a metal oxide (MO), or a salt (S) bywriting the correct abbreviation in the blank provided.Fe(OH) 3_______ HClO 4_______ P 2 O 5________ Na 2 C 2 O 4 ________ HNO 2 ________3. (5pts) Write a complete chemical reaction to show what happens when each of the chemicalspecies shown below is placed into water.IO 3- (aq)KCl (s)HNO 2(aq)KOH (s)CO 2(g)

4. (10 pts) Given that the pK a for hypochlorous acid is 7.5, what is the molarity of a sodiumhypochlorite (NaClO) solution that is found to have a pH of 10.05? Show all pertinent equationsand calculations for full credit.