catalysis Flashcards
1
Q
catalyst for hydrogenation of ethene
A
nickel
2
Q
catalyst for decomposition of hydrogen peroxide
A
MnO2
3
Q
catalyst for oxidation or ethanedioic acid by MnO4- ions
A
Mn2+ (autocatalyst)
4
Q
why can both Fe2+ and Fe3+ be used to catalyse S2O82- + 2I-
A
2 reactions can occur in either order
5
Q
why can transition metals be catalysts but normal metals can’t?
A
transition metals have variable oxidation states, normal metals only have 1 oxidation state
6
Q
how can catalyst poisoning be minimised?
A
purify the reactants periodically
7
Q
manganate (vii) ions, and their colour
A
MnO4-
purple
