transition metal ions Flashcards
(29 cards)
Ti3+
purple
V2+
purple
V3+
green
V4+
blue
V5+
yellow
Cr2+
blue
Cr3+
green
Cr6+
orange
Mn2+
pale pink
Mn6+
green
Mn7+
violet
Mn4+
brown
Fe2+
pale green
Fe3+
yelloq
Co2+
pink-purple
Co3+
green
Ni2+
green
Cu2+
blue
how do you write a Kp expression?
H2 + I2 –> –< 2HI
Kp = p(HI)2
————-
p(H2) p(I2)
what happens to the value of the rate constant k when temperature increases?
it increases. for many reactions increasing the temperature by 10C doubles the rate constant
what happens to K if the temperature increases when the forward reaction is exothermic?
K will decrease, the equilibrium yeild of products will decrease.
what happens to K if the temperature increases when the forward reaction is endothermic?
the equilibrium constant increases, the equilibrium yeild of products increases.
what is the effect on K of increasing the pressure/concentration in a system?
K will not change. when the concentration increases the system is no longer in equilibrium. the concentrations change to return the ratio back to the K value. this means the position of equilibrium will change but not the value of Kc or Kp.
define the term standard enthalpy change of formation
the enthalpy change that takes place when one mole of a compound is formed from its elements under standard conditions, with all reactants and products in their standard states.
