Chemistry

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  • Created by: Leeza
  • Created on: 19-03-13 18:56
Acids have a pH of.....
Less than 7
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Alkalis have a pH of.....
More than 7
2 of 40
Neutral substances have a pH of.......
pH7
3 of 40
An example of a neutral substance
Water
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True or false: pH 1 is less acidic than pH6
FALSE
5 of 40
True of false: pH 14 is a strong alkali, pH 8 is a weak alkali
TRUE
6 of 40
Acids turn blue litmus paper....
Red
7 of 40
Alkalis turn red litmus paper........
Blue
8 of 40
Acids turn universal indicator......
Red or orange
9 of 40
Alkali turns universal indicator.....
Dark green, blue or purple
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Neutralisation definition:
To make an acid or an alkali solution neutral
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When you neutralise an acid and an alkali the products are.....
Salt and water, and in some cases carbon dioxide
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A salt is....
...a group of compounds formed from acids. Different acids produce different types of salts
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Hydrochloric acids produce...
.... chloric salts
14 of 40
Sulphuric acids produce.......
.....sulphate salts
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Nitric acids produce.....
......nitrate salts
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Phosphoric acids produce.......
....phosphate salts
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Sulphuric acid + ammonium hydroxide =
Water + ammonium sulphate (salt)
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Nitric acid + potassium hydroxide =
Water + Potassium nitrate
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Phosphoric acid + Sodium Hydroxide =
Water + Sodium Phosphate
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Explain the chemistry involved in treating a nettle sting with a dock leaf
The alkali in the dock leaf neutralises the acid in the nettle sting and reduces the acid which causes the irritation
21 of 40
Physical changes include:
A change in colour or/and state
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Symbol for water
H2O
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Symbol for Magnesium
Mg
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Symbol for Copper
Cu
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Symbol for Copper Chloride
CoCl2
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Symbol for Hydrochloric acid
HCl
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Symbol for Copper Oxide
CuO
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Symbol for Carbon Dioxide
CO2
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Symbol for Oxygen
O2
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Symbol for Sodium Hydroxide
NaOH
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The average atom has a diameter of...
0.000000002cm
32 of 40
How many atoms can you fit into a 2 cm by 2 cm square?
100,000,000
33 of 40
Who invented the periodic table?
Dmitri Mendeleev
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How many atoms are there in the periodic table?
92
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An element is a substance that contains how many types of atoms?
1
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Concerning the atom, where is a proton in it and is it positive/negative/neutral?
It is at the centre of the atom and its positive
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Concerning the atom, where is a neutron in it and is it positive/negative/neutral?
It is at the centre of the atom and its neutral
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Concerning the atom, where is a electron in it and is it positive/negative/neutral?
It is orbiting the centre of the atom and its negative
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On the periodic table the atomic number is the....
...number of protons in the atom
40 of 40

Other cards in this set

Card 2

Front

Alkalis have a pH of.....

Back

More than 7

Card 3

Front

Neutral substances have a pH of.......

Back

Preview of the front of card 3

Card 4

Front

An example of a neutral substance

Back

Preview of the front of card 4

Card 5

Front

True or false: pH 1 is less acidic than pH6

Back

Preview of the front of card 5
View more cards

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