Equilibrium
If we reverse a reaction, what happens to K? (mathematically)
1/K
What is the pH of a 0.05M HCL solution?
pH = 1.3
On acid side of pH scale, acids are more _____
Protonated
What is the net ionic equation for the following reaction:
(NH4)2CO3 (aq) + Al(NO3)3 (aq) → NH4NO3 (?) + Al2(CO3)3
3CO32- (aq) + 2Al3+ (aq) → Al2(CO3)3 (aq)
What is the latin/ scientific name for the redwood tree?
Sequoia sempervirens
A Small K favors _____
Reactants
KW = What number?
1 x 10^-14
If the conjugate base is on the reactant side, I need Ka or Kb?
Kb
What are the steps to the 1/2 reaction balancing method for acidic conditions? (must answer all steps in correct order)
Split rxn into 2 half reactions, pair like with like
Balance all elements other than O and H as usual
Balance O by adding H2O
Balance H by adding H+
Balance charges by adding electrons (-e)
Confirm both half reactions have the same number of electrons, if not, add a coefficient to them to end up with same number of electrons in both ½ reactions
Combine both half reactions
Cross off spectators that are the same on both sides
What is the Wiyot name for Eureka?
Jaroujiji "where you sit and rest"
How do we convert Kc to Kp? (What is the formula)
Kp = Kc(RT)^Δn
What is the [H+] of a solution with a pH of 8.93?
1.175 x 10^-9
When pKa = pH, what is true?
[conjugate acid] = [conjugate base]
What is the oxidation state of Hydrogen in NaOH?
2MnCl2 + 5NaClO + 6NaOH → 2NaMnO4 + 9NaCl + 3H2O
+1
How many stop lights are in Arcata?
3 (All on Samoa Blvd)
What is the equilibrium expression for the following reaction: (Answer needs to be written down)
Ca5(PO4)3OH (s) + 4H+ (aq) → 5Ca2+(aq) + 3HPO42-(aq) + H2O (l)
[Ca2+]^5 [HPO42-]^3
—-------------------- = Kc
[H+]^4
Calculate the pH of a solution that is prepared by mixing 500.0 mL of 0.100 M HNO3 and 200.0 mL of 0.200 M KOH.
1.845
What is the Bronsted-Lowry definition of an acid ?
BL = acid donates H+ in any rxn
A sample of ideal gas has a pressure of 765 mmHg and colume of 10.9mL. The gas is expanded by increasing the volume of the container. If the final volume of the gas is 381 mL, what is its final pressure?
219 mmHg
What county has more artists per capita than any other county in California?
Humboldt (duh)
True or False: ALL reactions eventually reach equilibrium
TRUE
The 6 strong bases are: (Answer either in name or molecular formula)
LiOH ~ Lithium Hydroxide
NaOH ~ Sodium Hydroxide
KOH ~ Potassium Hydroxide
Ca(OH)2 ~ Calcium Hydroxide
Sr(OH)2 ~ Strontium Hydroxide
Ba(OH)2 ~ Barium Hydroxide
Calculate the pH of a 6.0M NH3 solution
pH = 12.1 ~ 12
What is the date of your next midterm according to your syllabus?
Wednesday 10/22/5
Fern Canyon is located in which two parks?
Prairie Creek Redwoods State Park and
Redwood National Park