Types of Forces
Nonmolecular Solids
Reactions
Acids and Bases/pH
Keq/shifting reactions
100
What is the difference between intermolecular forces and intramolecular forces? Between the 2, which are the strongest?
INTER=forces between molecules INTRA=forces within molecules Intramolecular forces are stronger
100
What are the 3 types of nonmolecular solids?
Ionic Compounds Network Covalent Substances Metals
100
What is always produced in a combustion reaction? (i.e. products)
CO2 and H2O
100
Which accepts a proton, and which donates a proton?
Acids donate Bases accepts
100
What is the unit for the Keq constant?
TRICKED YA! there is no unit lol
200
What are the 3 types of molecular forces?
London-Dispersion forces Dipole-Dipole Hydrogen Bonding
200
What is the chemical formula for quartz?
SiO2
200
What type of reaction is shown? (its not balanced but that doesn't matter) C6H14 + O2 --> CO2 + H2O
Combustion AND Double Replacement
200
If H3O is present, is it an acid or base?
Acid
200
If Keq is GREATER than 10^3, are reactants or products mostly present? What if Keq is LESS than 10^-3?
Keq>10^3 -->mostly products present Keq<10^-3-->mostly reactants present
300
What type of force do ALL molecules have?
London Forces
300
What characterizes a nonmolecular solid?
High melting points (above 100 degrees C)
300
Define Dissociation
IONIC compounds break up into cations and anions (electrolytes) COVALENT compounds stay together (nonelectrolytes) **examples** HCl - strong electrolyte tap water - weak electrolyte distilled water - nonelectrolyte ethanol - nonelectrolyte
300
How do you know if a solution is acidic or basic given just the pH?
below 7 = acidic above 7 = basic
300
If you remove heat from an EXOthermic reaction, where does the reaction shift? What if you take away heat?
remove-->shift right add-->shift left
400
What MUST to be present in order to have hydrogen bonding?
Either nitrogen, oxygen, or fluorine DIRECTLY bonded to hydrogen
400
What type of nonmolecular substance is Pb? melting point=328 degrees C
Metallic
400
On which side of the reaction is heat found in an ENDOTHERMIC reaction?
Heat + reactants --> products
400
What is the pH of a solution where [OH] = 5.2 x10^-8 M? Is this acidic or basic?
pH=6.7 Acidic
400
Where will this equation shift if you add CaO to this reaction? CaCO3 (s) --> CaO (s) + CO2 (g)
TRICKED YA AGAIN! solids aren't included in Keq
500
What types of forces are present in an NCl3 molecule?
London-Dispersion Dipole-Dipole
500
What type of solid is P4? melting point= 44 degrees C
Molecular Solid
500
On which side of the reaction of an EXOTHERMIC reaction will you find heat?
reactants --> products + heat
500
According to the Bronsted-Lowry definition, which of the following can act as a base? Is it strong or weak? PH3 BeH2 SiH4
PH3 Weak base
500
Write the Keq expression for the following: Fe2O3 (s) + 3CO (g) --> 2Fe (l) + 3CO2 (g)
Keq= [CO2]^3 ----------- [CO]^3
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