pH
Titrations
Buffers
Equilibrium
Miscellaneous
100
state the definition of pKa? pH? pOH
what is the -log(Ka), potential of hydrogen/hydronium, potential of hydroxide?
100
The formula at the midpoint is...
What is pH=pKa
100
State the Henderson-Hasselbach equation with pH= and pOH=
pH= -pKa (or -log(Ka)) + log (CB/A)
pOH=-pKb (or -log(Kb)) + log (CA/B)
100
Only these states of matter go in a Kc expression..
What is aqueous (aq) and gas (g)?
100
State the year that Shrek 2 was released?
What is 2004?
200
State the concentration of OH in a 1x10^-3M Ba(OH)2 solution.
What is 2x10^-3 M?
200
At equivalence ___ is equal to _____.
What is moles of titrant (substance being added) is equal to moles of analyte (substance being titrated)?
200
A buffer solution is made by mixing 0.25M NH3 and 0.15 NH4Cl. Given that the Kb for NH3 is 1.8x10^-5, calculate pH.
What is 9.48?
200
What is equal at equillibrium?
What is the rates of the forward and reverse reaction?
200
State the year of this iconic performance.
What is 1997?
300
Calculate the pH of a 2.75M HCN solution. Ka=6.2x10^-10 for HCN.
What is 3.38
300
Find the pH at equivalence point of a titration of 100mL of 0.1 M HCN (Ka=4.9x10^-10) with 0.1 M NaOH?
(Hint: Are they strong or weak acids/bases)
What is 11.0?
300
You have 500mL of a buffer solution containing 0.2M acetic acid and 0.3M sodium acetate. What will be the pH of this solution after adding 20mL of 1M NaOH solution? Ka= 1.8x10^-5
What is 5.07?
300
Write the Kc expression for the following reaction.
3A(s) + 1/2B(g) + 4C(aq) -> 2D(s) + 5E(aq)
What is Kc = [B]^1/2 [C]^4 / [E]^5
300
State the name of Episode III in the Star Wars movies.
What is Revenge of the Sith?
400
The Ka of H2SO3= 1x10^-2. Calculate the pOH in a 0.25M solution of H2SO3.
What is 12.3
400
A 40mL solution of 0.25M ammonia solution is titrated with 0.2M HCl. The Kb of ammonia is 1.75x10^-5. Calculate the pH at the four points.
1.) initial pH
2.) Midpoint (after 25mL of HCl)
3.) Equivalence (after 50mL of HCl)
4.) Excess (After 60mL of HCl)
1.) 11.3
2.) 9.25
3.) 5.28
4.) 2.98
400
Calculate the pH of a buffer solution prepared by dissolving 0.2 mols HCNO and 0.8 mols NaCNO in enough water to make a 1L solution. Ka of HCNO= 2x10^-4.
what is 4.3?
400
Express the relationship betweek K1 and K2. ** Assume all are gas
K1 = SO2 + 1/2 O2 -> SO3
K2 = 2SO3 -> SO2 +O2
K2 = 1/K1^2
400
Guess your PL's age
What is 20?
500
The pH of a certain solution is 2. How many H+ (ions) are there in a 1L solution?
6.022x10^21
500
A 35mL solution of 0.15M lactic acid is titrated with 0.1M NaOH. The pKa of lactic acid is 3.86. Calculate the pH at the four points.
1.) Initial pH
2.) Midpoint (after 17mL of NaOH)
3.) Equivalence (after 35mL of NaOH)
4.) Excess (after 45mL of NaOH)
1.) 2.34
2.) 3.86
3.) 8.37
4.) 12.10
500
If 84 grams of benzoic acid are added to a 2.43L buffer solution consisting of 0.79M formic acid and 0.94 formate, state the change in pH of the solution.
Ka of benzoic acid is 6.3x10^-5; Ka of formic acid is 1.8x10^-4.
What is 0.3?
500
Calculate the Kc. You have 1 mol H2S, 4 mol H2, and 0.8 mol S2 in a 4L vessel.
H2S -> H2 (g) + S2
What is 3.2?
500
Name the 7 ancient wonders of the world
What is the Lighthouse of Alexandra, the Hanging Gardens of Babylon, the pyramids of Giza, The Statue of Zeus, the Temple of Artemis, the Mausoleum at Halicarnassus, and the Colossus of Rhodes