revision

Question 1

what reaction is favoured by an increase in temperature?

Answer 1

endothermic reaction

Question 2

what reaction is favoured by a decrease in temperature?

Answer 2

exothermic reaction

Question 3

which get more soluble down the group hydroxides ok sufates?

Answer 3

hydroxides

Question 4

which increases up the halogen group, electronegativity or oxidising ability?

Answer 4

electronegativity

Question 5

reaction of nacl with H2So4?

Answer 5

NaCl+H2SO4–>NaHSo4+HCl

Question 6

reactions of NaBr with H2So4?

Answer 6

nabr+h2so4–>nahso4+hbr

2H++Br-+H2SO4–>SO2+2H2O+Br

Question 7

reactions of NaI with H2SO4?

Answer 7

NaI+H2SO4–>NaHSO4 + HI

8H+ +8I- +H2SO4 –> H2S +4H2O + 4I2

Question 8

Chlorine in sunlight

Answer 8

2Cl2 + H2O –> 4HCl + O2

Question 9

Chlorine with an alkali

Answer 9

Cl2 + 2NaOH –> NaClO + NaCl + H20

Question 10

half equation at the negative electrode of a lithium ion cell?

Answer 10

Li+ + e- –> Li

Question 11

Half equation at the positive electrode of a lithium ion cell?

Answer 11

Li+ +CoO2 + e- –> Li+(CoO2)-

Question 12

what is the formula for (en)?

Answer 12

NH2CH2CH2NH2

Question 13

reactions in the contact process

Answer 13

SO2 + V2O5 –> SO3 + V2O4

2V2O4 + O2 –> 2V2O5