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(4) periodic table
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Cards (20)
Where on the reactivity series would you find copper, the top or the bottom?
copper is at the
bottom
Which two non-metals are found in the reactivity series?
hydrogen
and
carbon
Write a word equation for the oxidation of magnesium to form magnesium oxide.
magnesium
+ oxygen --> magnesium
oxide
Calcium is in group 2 of the Periodic Table. What charge will be on a Calcium ion?
calcium is a
2+
ion
What ion is produced by acids?
hydrogen
ion.
H+
What is the pH of a neutral solution?
7
pH
True or false alkalis have a pH of more than 7?
true
When an acid reacts with a metal which gas is produced?
hydrogen
Which acid has the formula H2SO4?
sulfuric acid
What ion is produced by all alkalis?
hydroxide
ion.
OH-
What is a strong acid?
a strong acid is an
acid
which is fully
ionised
in water
The pH of a solution changes from 6 to 4. What happens to the concentration of hydrogen ions?
it
decreases
- by a factor of
10
x 10 = 100
Define oxidation in terms of electrons.
oxidation
is the
loss
of electrons
Define reduction in terms of electrons
reduction
is the gain of
electrons
Calcium reacts with hydrochloric acid to form
calcium chloride
and
hydrogen.
The equation for this reaction can be split into two ionic equations:
Ca →
Ca2
+ +
2e-
2H
+ + 2e- →
H2
Which species is
oxidised
? Explain your answer.
calcium (Ca) is
oxidised
because it
loses electrons
in the reaction
Calcium reacts with hydrochloric acid to form calcium chloride and
hydrogen
. The equation for this reaction can be split into two ionic equations:
Ca → Ca2+ + 2e-
2H+ + 2e- → H2
Which species is reduced? Explain your answer.
hydrogen (H) is
reduced
, it
gains electrons
What is the general (ionic) equation for neutralisation?
H+ + OH- --> H2O
What do we call the molten ionic compound used in electrolysis?
the electrolyte
Predict the products of the electrolysis of an aqueous solution of sodium bromide.
bromine
and
hydrogen
Write down the half equations for the reactions that take place at each of the electrodes in the electrolysis of aqueous sodium bromide.
cathode
- 2H+ + 2e- -->
H2
anode
- 2Br- -->
Br2
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