Ammonia Acid Worksheet With Answers Page 38
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49M6.
(a)
Bunsen (burner)
accept spirit burner do not credit candle
1
(b)
blue
1
white
credit (1) if both colours correct but answers are reversed
1
to cool the tube (B)
accept answers which anticipate part (d) e.g. ‘to condense the
water vapour’ or gases or vapours
1
(d)
(i)
water
do not credit ‘condensation’
1
(ii)
(Water) vapour from the crystals (from tube A)
accept steam or steam from tube A
1
condenses or cools
accept turns to (liquid) water
1
(e)
add water
gets hot or hotter or warm or warmer turns into solution
dissolves
or the temperature rises or there is an exothermic reaction
accept steams or hisses ignore any reference to colour(s)
2
(f)
sulphuric acid
accept H
S0
only if correct in every
2
4
detail
1
[10]
M7.
(a)
NO
/ 2NO
/ Nitrogen dioxide
2
2(g)
for one mark
1
(b)
particles of gas move / they move
reject spread out
particles move randomly / mix / go between air molecules / diffusion
any two for 1 mark each
2
Page 38 of 49
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