IMFs
What's the weakest IMF Bond?
Bonus: What's the strongest IMF Bond
London Dispersion Force (LDF)
Bonus: Ion-dipole (Hydrogen also accepted)
Which type of solid consists of atoms, ions, or molecules arranged in a regular repeating pattern?
Crystalline Solid or Lattice
What are the products of combustion reactions?
CO2 and H2O
Acids ... [H+]; bases ... [H+]
How are buffers created?
Weak acid + Conjugate Base
Weak base + Conjugate Acid
What type of molecules contain dipole-dipole forces?
Polar molecules
Force gets stronger as molecule is more polar
FALSE, the IMFs break
What is the best formula for dilution calculations?
M1V1 = M2V2
Identify the acids and bases
HC2H3O2 + H2O == C2H3O2- + H3O+
Acids: HC2H3O2 and H3O+
Bases: C2H3O2- and H2O
What does it mean when the pH is the same as the pKa?
The weak acid is the same as the conjugate base
Do boiling points and melting points increase or decrease as IMFs increase?
Increase
What is the general trend for solubility of most solid solutes in water as temperature increases?
Solubility increases with temperature
What happens to the oxidation number when atom loses or gain electrons, and has it be oxidized or reduced?
When an atoms gains: oxidation number decreases and it has been reduced
When an atom loses: oxidation number increases and it has been oxidized.
What does it mean if K > 1?
The reactants are stronger
What does it mean when there's more buffer capacity?
There's more moles of weak acid and conjugate base or weak base and conjugate acid
Do vapor pressure and volatility decrease or increase as IMFs increase?
Decrease
How does increasing pressure affect the solubility of gases in liquids?
Increasing pressure increases the solubility of gases (Henry's Law)
Which of the following compounds is the oxidation number of chromium the greatest?
A) CrO42-
B) CrO
C) Cr3+
D) Cr (s)
A
What does a larger Ka and/or Kb mean
The stronger acid or base
State whether the equivalence point would be above, below, or at 7
Weak Base + Strong Acid
Weak Acid + Strong Base
Strong Base + Strong Acid
Below, above, and at
Why does NH3 have a higher boiling point than PH3, despite them both being group 15 hydrides?
NH3 has hydrogen bonds while PH3 has dipole-dipole forces
Do molecular and ionic solids conduct electricity?
If not at what phase do they conduct electricity?
Ionic: High MP/BP, Not as solids do they conduct electricity but they do at liquids.
What is the limiting reagent when potassium carbonate and calcium chloride are mixed?
Potassium Carbonate
If a salt contains a conjugate base of a weak acid, the salt is going to be slightly...
If a salt contains a conjugate acid of a weak base, the salt is going to be slightly...
If a salt contains conjugates of strong acid/bases, the ion is...
Basic, acidic, neutral
Calculate the pH of a buffer solution made from 0.25 M HF and 0.10 M NaF. The Ka for HF is 6.6 * 10-4
pKa = -log(6.6*10-4) = 3.18
pH = 3.18 + log(0.10/0.25) = 2.78