CORE CHEMISTRY

What does redox mean?
oxidation and reduction considered together as complementary processes.
1 of 30
What is a precipitate?
cause (a substance) to be deposited in solid form from a solution.
2 of 30
Which gas was present in the early earth atmosphere?
Ammonia
3 of 30
Which gas makes up nearly 80% of our current atmosphere?
Nitrogen
4 of 30
What do scientists think was responsible for much of the gases in the early earth atmosphere?
Volcanoes
5 of 30
Which pH would show a strong acid?
A strong acid has a pH of 1. pH 14 is a strong alkali
6 of 30
What type of salt is produced by hydrochloric acid?
Chlorides
7 of 30
What are the products from a metal carbonate + acid reaction?
Salt, water and carbon dioxide are always produced in a metal carbonate + acid reaction
8 of 30
Zinc oxide + sulfuric acid = ?
zinc sulfate + water
9 of 30
What does corrosive mean?
Eats away skin and other materials
10 of 30
What type of substances undergo electrolysis?
Ionic substances undergo electrolysis. Metallic substances do conduct electricity but do not separate using electrolysis.
11 of 30
What is produced from the electrolysis of sea water?
Chlorine, hydrogen and sodium hydroxide are produced in the electrolysis of sea water. Chlorine is produced as the salt in sea water also electrolyses.
12 of 30
Which electrode do the negative ions move to?
Positive
13 of 30
What is the test for oxygen produced in an electrolysis?
Relights a glowing splint
14 of 30
What is sodium hydroxide used for?
Cleaning products
15 of 30
Granite is an example of which type of rock?
Igneous
16 of 30
Which type of rock is it most likely to be if it contains fossils?
Sedimentary
17 of 30
What type of crystals will an extrusive igneous rock have?
Small crystals
18 of 30
Which type of rock is formed from cooled magma?
Cooled magma forms igneous rocks.
19 of 30
Limestone, chalk and marble are all examples of which compound?
Calcium carbonate
20 of 30
What is the process known as where a compound is broken down using heat?
Thermal decomposition
21 of 30
Which carbonate would break down easiest?
Copper is an unreactive metal so its carbonate would be easiest to split. Calcium is a very reactive metal so its carbonate would be hard to split.
22 of 30
Which calcium compound is used to remove acidic gases from coal fired power stations?
Copper is an unreactive metal so its carbonate would be easiest to split. Calcium is a very reactive metal so its carbonate would be hard to split.
23 of 30
For the reaction copper + oxygen -> copper oxide, which is the correct balanced equation?
2Cu + O2 -> 2CuO
24 of 30
At the end of a reaction, how will the mass of products be compared to the mass of reactants?
The same
25 of 30
What is a precipitation reaction?
A reaction where an insoluble solid is formed
26 of 30
What colour precipitate does copper form?
Copper forms a blue precipitate.
27 of 30
In the equation Mg + O2 -> MgO which element has been oxidised?
Magnesium has gained oxygen so has been oxidised. Oxygen has not gained oxygen.
28 of 30
What is added to iron to make steel?
Carbon
29 of 30
How is iron extracted from its ore
Iron is less reactive than carbon so can be extracted by heating with carbon. Too much energy would be needed for heating alone.
30 of 30

Other cards in this set

Card 2

Front

What is a precipitate?

Back

cause (a substance) to be deposited in solid form from a solution.

Card 3

Front

Which gas was present in the early earth atmosphere?

Back

Preview of the front of card 3

Card 4

Front

Which gas makes up nearly 80% of our current atmosphere?

Back

Preview of the front of card 4

Card 5

Front

What do scientists think was responsible for much of the gases in the early earth atmosphere?

Back

Preview of the front of card 5
View more cards

Comments

No comments have yet been made

Similar Chemistry resources:

See all Chemistry resources »See all Acids, bases and salts resources »