Chemisty 2&3

?
  • Created by: IT4335
  • Created on: 02-06-17 11:39
How many other carbon molecules is each carbon molecule bonded with in a diamond
4
1 of 30
What can graphite conduct
heat and electrisity
2 of 30
Why can graphite layers slide over each other
weak inter molecular forces
3 of 30
why can graphite conduct heat and electrisity
a delocalised electron is present
4 of 30
What controls the rate of reaction
catalyst, temperature, concentration, pressure, surface area,
5 of 30
why does temperature increase the rate of reaction
particles have more energy
6 of 30
how does pressure and concentration affect the rate of reaction
colllison theory more particles in a smaller amount of space
7 of 30
how does the presence of a catalyst effect the rate of reaction
they lower the activation energy
8 of 30
what is an exothermic reaction
reactons that transfer energy to the surroundings
9 of 30
what is an endothermic reaction
reactions that take in energy from surroundings
10 of 30
What are examples of an endothermic reaction
thermal decomosition
11 of 30
why do endothermic reations occur
more bonds are broken than made
12 of 30
what are examples of exothermic reactions
combustion oxidation and neutralisation
13 of 30
why do exothermic reactions occur
less bonds are broken than made
14 of 30
acid + metel=
salt + hydrogen
15 of 30
acid+ base=
salt+ water
16 of 30
acid + alkali=
salt + water
17 of 30
Why is cryolite used in the electrolisis of aluminium
to lower the boiling point
18 of 30
what can gaining electrons be callled in electrolosis
reduction
19 of 30
Why is electroplating used
to make a product more appealing to prevent corroding, increase hardness of the surface, reduce cost
20 of 30
Why is mendeleevs periodic table better
he left gaps for undiscoverd elements as well as putting them in order of protons
21 of 30
what determins an elements properties
the number of electrons in the outer shell
22 of 30
what compounds make water hard
ca2+ and mg2+
23 of 30
what precipitate is formed when hard water reacts with soap
scum
24 of 30
what happens when tempory hard water is heated
scale is formed
25 of 30
what is a negative of scale
the efficiency of heating is reduced
26 of 30
What are medical positives of hard water
stronger teeth and bones lower risk of heart disease
27 of 30
how can you remove hardness from perminant hard water
ion exchange colum and adding washing soda
28 of 30
how do you remove hardness from temporary hard water
heating
29 of 30
disadvantages of using hydrogen as a fuel
supply storage and safety
30 of 30

Other cards in this set

Card 2

Front

What can graphite conduct

Back

heat and electrisity

Card 3

Front

Why can graphite layers slide over each other

Back

Preview of the front of card 3

Card 4

Front

why can graphite conduct heat and electrisity

Back

Preview of the front of card 4

Card 5

Front

What controls the rate of reaction

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 All hard parts of c2 and c3 resources »