How do you spell that’s French guy’s name? Acids and Bases Do you like Special K? E is for Equilibriu m And More Lovely Stuff $100 $100 $100 $100 $100 $200 $200 $200 $200 $200 $300 $300 $300 $300 $300 $400 $400 $400 $400 $400 $500 $500 $500 $500 $500
That French guy’s name #1. Bromothymol blue (yellow in acidic solution, blue in basic solution) HIn(aq) H + (aq) + In - (Aq) Yellow Blue Which way will the equilibrium shift if NaOH is added?. Le Chateaux Principle?. Fe 3+ (aq) + SCN - (aq) FeSCN 2+ (aq) Gold colorless Red-brown - PowerPoint PPT Presentation
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How do you spell
that’s French guy’s name?
Acids and Bases
Do you like Special K?
E is for Equilibrium
And More Lovely Stuff
$100 $100 $100 $100 $100
$200 $200 $200 $200 $200
$300 $300 $300 $300 $300
$400 $400 $400 $400 $400
$500 $500 $500 $500 $500
That French guy’s name #1
• Bromothymol blue (yellow in acidic solution, blue in basic solution)
HIn(aq) H+(aq) + In-(Aq)Yellow Blue
• Which way will the equilibrium shift if NaOH is added?
At equilibrium, which is true? (a) The concentrations of both SO2 and O2 will be
much larger than the concentration of SO3.
(b) The concentrations of both SO2 and O2 will be much smaller than the concentration of SO3.
(c) The concentration of O2 will be exactly one half the concentration of SO3.
(d) The concentration of O2 will be exactly twice the concentration of SO3.
Equilibrium #2
(a) (b) (c) (d) (e)
X + Y XY
Which box represents the system when it has first reached equilibrium?
Acids & Bases #3• Benzoic acid (C6H5CO2H); Ka = 6.4 x 10-5.
What is the pH of a 0.25 M solution of this acid?
Equilibrium #3• The equilibrium constant, Kc, for the reaction
SO3(g) + NO(g) NO2(g) + SO2(g)
is found to be 5.25 x 10-3 at a certain temperature. If 0.375 mol of SO3 and 0.375 mol of NO are placed in a 2 L container and allowed to react, what will be the equilibrium concentration of each gas?
Special K…..Which of the following reactions will form more products (at equilibrium) at the same temperature?
Reaction A: K = 1.57Reaction B: K = 0.068Reaction C: K = 235.90Reaction D: K = 3.5 x 102
…or perhaps cornflakes
2A + B 2C + D
• If K for the following reaction is 1.55x10-2, and the following initial concentrations are used: [A] = 0.25 M; [B] = 0.37 M; [C] = 0.87 M; [D] = 0.56 M, which way will the reaction have to shift to achieve equilibrium?
Other Lovely Stuff• What’s the name of this shameless
2002 ‘Matrix’ rip-off?
More Lovely Stuff
• Who do you want to win the democratic nomination for this year’s presidential campaign?
• Barack Obama• Hilary Clinton• Dennis Rodman• John McCain• David Hasselhoff
And still more lovely stuff
Very Special K
2A + B C + 2D
•Equilibrium Expression?
•[A]o = 0.52 M, [B]o = 0.32 M, [C]o = 0.63 M and [D]o = 0.48 M; if [B]e = 0.18 M, what is K for this equilibrium?
Science on TV #3• What science fiction-based comedy
series are these characters from?
Science on TV #4• In the TV show CSI, one of the tests
the scientists use to detect the presence of blood is through the use of a Q-tip and several clear solutions. If a pink color is observed on the Q-tip, this is a positive test for blood.
• What is the solution they use which gives the pink color?
Science on TV #5
• ER: In this show, actors play many roles, including those of people who are employed specifically to draw patients’ blood.
• What is the name of this profession?
Pick ‘n’ Mix 1• What are the units for the
universal gas constant, R?
Pick ‘n’ Mix 2• A balloon is being inflated. V
changes from 3.60 x 104 L to 1.50 x 105 L during inflation, by addition of 0.5 x 105 J of energy (as heat). Balloon expands against external pressure of 1.25 atm. Calculate E for process. (1 L.atm = 101.3 J)
Pick ‘n’ Mix 3
• Draw Lewis dot structures for each of the following elements:
• C, H, N, O, F and Xe
• Extra Credit: What does the number of unpaired electrons tell you about each element?
Pick ‘n’ Mix 4• What is the chemical equation that
corresponds to the standard enthalpy of formation (Hf) of perchloric acid, HClO4(l) ?