chemical reactions and equations Flashcards
1
Q
decomposition of ferrous sulphate crystals
A
green –> white
2
Q
what is used in white washing
A
slaked lime (calcium hydroxide)
3
Q
the colour of NO2/nitrogen dioxide fumes
A
brown
4
Q
silver chloride in sunlight
A
white –> grey
5
Q
what is used in black and white photography
A
sliver chloride / silver bromide
6
Q
combination rxn is?
A
exothermic
7
Q
decomposition rxn is ?
A
endothermic
8
Q
iron nail in copper sulphate soln
A
iron - brownish ; copper sulphate - blue colour fades
9
Q
cooper (II) oxide when H2 (g) is passed
A
black – brown (equilibrium/goes both ways)
10
Q
iron, silver, copper in corrosion
A
iron –> reddish brown layer ; silver –> black layer ; copper –> green layer
