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next chemistry word-fill 9Fwf3
multi-word fill quiz 9Fwf2 on "Patterns of reactivity"
14 7 alkali calcium chemical colourless dangerous exothermic glasses green heat hydrogen hydroxide ignites metal new potassium purple screen sodium test tube
1. Some metals like
14
7
alkali
calcium
chemical
colourless
dangerous
exothermic
glasses
green
heat
hydrogen
hydroxide
ignites
metal
new
potassium
purple
screen
sodium
test
tube
react with cold water to form an
14
7
alkali
calcium
chemical
colourless
dangerous
exothermic
glasses
green
heat
hydrogen
hydroxide
ignites
metal
new
potassium
purple
screen
sodium
test
tube
and a
14
7
alkali
calcium
chemical
colourless
dangerous
exothermic
glasses
green
heat
hydrogen
hydroxide
ignites
metal
new
potassium
purple
screen
sodium
test
tube
gas.
2. If the gas is collected in an inverted (upside down!)
14
7
alkali
calcium
chemical
colourless
dangerous
exothermic
glasses
green
heat
hydrogen
hydroxide
ignites
metal
new
potassium
purple
screen
sodium
test
tube
14
7
alkali
calcium
chemical
colourless
dangerous
exothermic
glasses
green
heat
hydrogen
hydroxide
ignites
metal
new
potassium
purple
screen
sodium
test
tube
of water (tricky!) and a lit splint applied it pops! showing the gas to be
14
7
alkali
calcium
chemical
colourless
dangerous
exothermic
glasses
green
heat
hydrogen
hydroxide
ignites
metal
new
potassium
purple
screen
sodium
test
tube
.
3. If universal indicator is added to the water, during the reaction it changes from
14
7
alkali
calcium
chemical
colourless
dangerous
exothermic
glasses
green
heat
hydrogen
hydroxide
ignites
metal
new
potassium
purple
screen
sodium
test
tube
(pH
14
7
alkali
calcium
chemical
colourless
dangerous
exothermic
glasses
green
heat
hydrogen
hydroxide
ignites
metal
new
potassium
purple
screen
sodium
test
tube
) to
14
7
alkali
calcium
chemical
colourless
dangerous
exothermic
glasses
green
heat
hydrogen
hydroxide
ignites
metal
new
potassium
purple
screen
sodium
test
tube
(pH
14
7
alkali
calcium
chemical
colourless
dangerous
exothermic
glasses
green
heat
hydrogen
hydroxide
ignites
metal
new
potassium
purple
screen
sodium
test
tube
), showing an alkaline solution is formed.
4. This reaction is
14
7
alkali
calcium
chemical
colourless
dangerous
exothermic
glasses
green
heat
hydrogen
hydroxide
ignites
metal
new
potassium
purple
screen
sodium
test
tube
, it should be done behind a safety
14
7
alkali
calcium
chemical
colourless
dangerous
exothermic
glasses
green
heat
hydrogen
hydroxide
ignites
metal
new
potassium
purple
screen
sodium
test
tube
and safety
14
7
alkali
calcium
chemical
colourless
dangerous
exothermic
glasses
green
heat
hydrogen
hydroxide
ignites
metal
new
potassium
purple
screen
sodium
test
tube
should be worn.
5. You can tell a
14
7
alkali
calcium
chemical
colourless
dangerous
exothermic
glasses
green
heat
hydrogen
hydroxide
ignites
metal
new
potassium
purple
screen
sodium
test
tube
change is taking place because
14
7
alkali
calcium
chemical
colourless
dangerous
exothermic
glasses
green
heat
hydrogen
hydroxide
ignites
metal
new
potassium
purple
screen
sodium
test
tube
is given out and bubbles are seen as
14
7
alkali
calcium
chemical
colourless
dangerous
exothermic
glasses
green
heat
hydrogen
hydroxide
ignites
metal
new
potassium
purple
screen
sodium
test
tube
substances are formed.
6. The reaction of potassium with water is so
14
7
alkali
calcium
chemical
colourless
dangerous
exothermic
glasses
green
heat
hydrogen
hydroxide
ignites
metal
new
potassium
purple
screen
sodium
test
tube
, that the heat given out
14
7
alkali
calcium
chemical
colourless
dangerous
exothermic
glasses
green
heat
hydrogen
hydroxide
ignites
metal
new
potassium
purple
screen
sodium
test
tube
the hydrogen gas and lilac flame is seen.
7. The general equation for the reaction is:
(a) metal + cold water ==>
14
7
alkali
calcium
chemical
colourless
dangerous
exothermic
glasses
green
heat
hydrogen
hydroxide
ignites
metal
new
potassium
purple
screen
sodium
test
tube
hydroxide + hydrogen
so complete the following ...
(b)
14
7
alkali
calcium
chemical
colourless
dangerous
exothermic
glasses
green
heat
hydrogen
hydroxide
ignites
metal
new
potassium
purple
screen
sodium
test
tube
+ water ==> potassium hydroxide + hydrogen
(c) calcium + water ==>
14
7
alkali
calcium
chemical
colourless
dangerous
exothermic
glasses
green
heat
hydrogen
hydroxide
ignites
metal
new
potassium
purple
screen
sodium
test
tube
14
7
alkali
calcium
chemical
colourless
dangerous
exothermic
glasses
green
heat
hydrogen
hydroxide
ignites
metal
new
potassium
purple
screen
sodium
test
tube
+
14
7
alkali
calcium
chemical
colourless
dangerous
exothermic
glasses
green
heat
hydrogen
hydroxide
ignites
metal
new
potassium
purple
screen
sodium
test
tube
CHECK
OK
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KS3 CHEMISTRY + ALL LINKS
next chemistry word-fill 9Fwf3