Questions I Got Wrong P3 Flashcards
Observations with magnesium reacting with steam
Bright white light & white solid formed.
Observations of calcium reacting with oxygen
Yellow flame & white solid forms
Why is the entropy of lattice dissociation of barium oxide less endothermic than the enthalpy of lattice dissociation of magnesium oxide
Bariumion is larger than magnesium ion, meaning it has a weaker attraction to the oxide ion
Why do ka expressions not include water
The concentration of water is effectively constant
What are the observations of magnesium & steam
White light & white solid formed
Observation in the reaction phosphorus (V) oxide & water
Violent reaction& colourless solution formed
Why is Cu+ not coloured?
Cu+ has a full d subshell so no d-d transitions are possible
What about vanadium ions makes them good for use as a catalyst
Have variable oxidation states
Give a reason why a support medium is used in catalysts
To increase surface area
