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Chemistry
Metal oxides
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Cards (43)
Metal compound inside it's rock is it's
Ore
Metals are arranged inorder of
Reactivity
Which metals do not react when in contact with water
Copper
,
sliver
,
gold
Potassium, sodium,lithium, calcium
React violently
When metals react they form
Positive ions
Metals above carbon must be
Extracted
using
electrolysis
Oxidation is
Loss
of
electrons
reduction is
Gain
of
electrons
2 non-metals in the reactivity series are
Carbon
and
hydrogen
Gold is an
Unreactive metal
Reactions between metals and metals and acids occur if the metal is
More reactive
than the
hydrogen
in the
acid
If a metal is too reactive
The reaction is
violent
Why should non-metals like sodium not be used in an experiment at school
Because they are
too reactive
and
dangerous
as it may
explode
In the reaction between hydrogen and hydrochloric acid
The
hydrogen ions
are
displaced
by
magnesium
because
magnesium
is
more reactive
than
hydrogen
Acids are neutralised by
alkali
and
base
to
Produce salts,water,metal carbonate, carbon dioxide
Salts are made from
Positive
ions and a
negative
ion from the
acid
Indicators are
substances
which change the
colour
when added to
acids
Litmus goes red in
Acid
Litmus goes blue in
Alkali
What tells pH
Universal indicator
How many dyes is universal indicators
Many
Scale of universal indicators is from
0
to
14
In the scale
0
is most
acidic
In a scale what is most alkaline
14
In a scale 7 is
Alkaline
What solutions have a pH of less than 7
Aqueous
What is used to record the change of pH over time
PH meter
Acids also produce
hydrogen
ions
Alkalis also produce
Hydroxide ions
In neutralisation between acid and alkali ions react with hydroxide ions
To produce
water
In a reaction an acid
Ionises completely
A weak acid
Partially ionises
in
aqueous
solution
Examples of weak acid are
Ethanol
,
citric
,
carbonic
Citric acid is a
Weak acid
Carbonic acid is a
Weak acid
Hydrochloric acid is
A
strong acid
Nitric acid is a
strong
acid
ethanoic acid is a
weak
acid
Sulfuric acid is a
Strong acid
A weak acid has a lower what compared to a strong acid with the same concentration
pH
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