tm catalysis

Question 1

how do TM catalysts work

Answer 1

they change oxidation states easily and thus can transfer electrons to speed up reactions

Question 2

Contact process equations and explain what happens

Answer 2

1. V2O5 + SO2 = V2O4 + SO3
2. V2O4 + 1/2O2 = V2O5

Vanadium oxidises SO2 to SO3 and is reduced, then it is oxidised again by oxygen gas back to original state in second equation

Question 3

What is a heterogeneous catalyst

Answer 3

differrent phase/state from reactants

Question 4

haber process equation

Answer 4

N2 + 3H2 =(Fe)=2NH3 iron catalyst

Question 5

homogeneous catalyast definition

Answer 5

catalyst in the same phase/state as reactants

Question 6

what is special about homogeneous catalysys

Answer 6

forms an intermediate first

Question 7

Fe2+ catalysing reaction between S2O82- and I- equations

Answer 7

1. S2O82- + 2Fe2+ = 2Fe3+ + 2SO42-

2. 2Fe3+ + 2I- = I2 + 2Fe2+

Question 8

Why is Fe2+ perfect fro catalysing S2O82-?

Answer 8

opposite charged ions so no repulsion

Question 9

what is autocatalysis

Answer 9

when a product catalyses the reaction

Question 10

example of autocatalysis reaction

Answer 10

Mn2+ catalyses C2O4- + MnO4-

Question 11

why is the reaction between C2O4- and MnO4- originally slow

Answer 11

no catalyst at first and they have the same charge so they repel

Question 12

equation for reaction between C2O4- and MnO4- catalysed to make Mn2+

Answer 12

2MnO4- + 16H+ + 5C2O4(2-) = 2Mn2+ + 8H2O + 10CO2

Question 13

equation 1 for Mn2+ autocatalysis

Answer 13

MnO4- + 4Mn2+ + 8H+ = 5Mn3+ + 4H2O

Question 14

equation 2 for Mn2+ autocatalysis

Answer 14

2Mn3+ + C2O4(2-) = 2Mn2+ + 2CO2