Phases and More
Solubility
Equilibrium
Thermodynamics
Electrochemistry
100
What is the phase transition where gas becomes liquid?
Condensation
100
Is a solution homogeneous or heterogeneous?
Homogeneous
100
Which is the conjugate base in this reaction:
HCO3- (aq) + HF (aq) ⇌ H2CO3 (aq) + F- (aq)
F-
100
What thermodynamic quantity expresses the degree of disorder in a system?
Entropy
100
What is the oxidation number of O in H2O?
-2
200
What is the weakest intermolecular force?
London dispersion force
200
When liquids do not mix and form separate layers, the resulting solution is ______.
Immiscible
200
A ____ is a solution that maintains a relatively constant pH when small amounts of acid or base are added.
Buffer
200
At equilibrium is the change in free energy positive, negative, or 0?
0
200
In a galvanic cell, reduction occurs at the _____.
Cathode
300
Sodium chloride is an example of a _____ solid.
Ionic
300
If you add more solute to solution, what happens to the boiling point?
It increases
300
Will a weak acid have a low or high Ka?
Low
300
When water evaporates, is the change in entropy positive or negative?
Positive
300
What type of battery is rechargeable and is often used in electronic devices like cell phones?
Lithium ion battery
400
A mixture with particles that do not settle out is called a _____.
Colloid
400
Which law can be used to understand vapor pressure of a solution?
Raoult's Law
400
A ____ donates an electron pair to form a covalent bond.
Lewis base
400
Fuel cells are a kind of galvanic cell that also uses ______.
Fuel and an oxidant
400
What process uses electricity to break down a compound?
Electrolysis
500
What is the phase of the compound in Region 2?
Liquid
500
What are the 4 colligative properties?
Vapor pressure lowering, boiling point elevation, freezing point depression, osmotic pressure
500
According to Le Chatelier's Principle, if you lower the concentration of a reactant, what direction will the reaction proceed?
To the left (reverse)
500
If a reaction has a positive change in enthalpy and a negative change in entropy, is it spontaneous?
No
500
How do you calculate cell potential for a galvanic cell?
Subtract the standard cell potential of the anode from that of the cathode.