Chem Flashcards
Number of valence electrons determines what?
How many covalent bonds are possible
Electronegativity of atoms in a covalent bond determines what?
Bond polarity
Bond polarity (primary) and electronegativity (secondary) influence what?
Reaction likelihood and bond strength
What is the valence and bond capability of c?
4,4
What is the valence and bond capability of n?
5,3
What is the valence and bond capability of o?
6,2
What is the valence and bond capability of f and other halogens?
7,1
What unit is used in chemistry to group amounts of atoms/ particles
The mole
What is avagadros constant
It is how moles are calculated
1 mole = 6.02*10^23 particles/ atoms
What equation is used for mass moles
n=m/M
What is equation is used for volume mols
n=c*V
What is the difference between number of moles and molarity
Number of moles is amount of stuff molarity is amount of stuff in solution ie concentration unit
What is the equation for calculating gas mol
P/RT = n/V
What is the gas law
PV=nRT
How do reactions obey the law of conservation of mass
Molar amounts must remain consistent between reactants and products ie balanced equations
What is reaction rate
How quickly reactants are used or how quickly products are formed
What is reaction yield
How much is produced from a reaction
What units express reaction rate
Change in concentration/ time mol/s
Kinetic theory suggests four ways to change reaction rate
Change concentration, change in temperature, change in volume or pressure, add a catalyst
What is the a quotient
An expression of reaction rate where q= [products][reactants]
What is dynamic equilibrium
A point where the rate of the forward and reverse reaction are equal
What is the k quotient
The reaction rate equation but for the point where equilibrium is achieved
If q is left of k which reaction is favoured
The forward reaction
If a is right of k which reaction is favoured
The reverse reaction
