Ammonia Acid Worksheet With Answers Page 46
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49plus one of:
•
can explode / cause a fire
•
is free
•
is under pressure
•
can leak
•
releases quickly
1
(d)
(i)
loss of an electron or loses electrons
do not accept any ref. to oxygen
1
(ii)
full outer shell of 8 electrons on circle
need not be paired
can be ×, dot or e
do not accept if extra electrons added to inner shell
1
[10]
M20.
(a)
carbon dioxide
must be name
do not accept carbon oxide
1
(b)
(i)
the temperature of the solution will decrease
(list principle)
1
(ii)
energy is taken in from the surroundings
(list principle)
1
[3]
M21.
(a)
(i)
increase
1
(ii)
high melting point
1
(b)
(i)
decreases
1
increases
1
Page 46 of 49
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