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AQA C2F Chemistry January 2008
Based on the questions from Chemistry 2 foundation January 2008
22
Science
Not Applicable
05/17/2009

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Cards

Term

[image]

How do you write the formula of ammonia?

Definition
NH3
Term

ammonia can be described as

an ion

a molecule or

an ion

Definition
a molecule
Term
what type of bonding is there in a molecule of methane
Definition
covalent
Term
how many different elements are there in silicon dioxide
Definition

two

silicon and oxygen

Term
diamond, graphite and silicon dioxide all have which type of bonding
Definition
covalent
Term
Which element makes up diamond?
Definition
carbon
Term
an exothermic reaction is one which.....
Definition
gives out heat
Term
what is the formula of magneisum oxide
Definition
MgO
Term
When magnesium oxide reacts with hydrochloric acid which salt is formed?
Definition
Magneisum chloride
Term
electrolysis takes place when electricity passes through..... compounds when they are molten or in solution
Definition
ionic
Term
During electrolysis the compound is broken down to form.......
Definition
elements
Term
Name the two gases produced during the electrolysis of sodium chloride solution
Definition
hydrogen gas and chlorine gas
Term
What useful solution is formed from the electrolysis of sodium chloride?
Definition
sodium hydroxide
Term

complete the word equation for the Haber process

nitrogen + _______<=>________

Definition

hydrogen

ammonia

Term
what does the <=> symbol mean
Definition
reversible reaction
Term
Why is there iron in the reactor
Definition
it is a catalyst to make the reaction take place faster
Term
What is done with the unreacted nitrogen and hydroen?
Definition
they are recycled to save resources and money
Term
Why are ammonia factories normally near towns?
Definition

provides workers

good transport links

Term
Why does an increace in temperature increace the rate of reaction
Definition

Any three from:

particles have more energy

move faster

collide more often

more chance of collisions

bump into each other more

collide with more force / energy

more particles have the activation energy

more collisions result in reaction

more collisions are successful

Term
Why can metals be bent and hammered into shape?
Definition

they are made of layers

atoms / ions / particles / layers (of atoms) can slide over each other

 

Term
What size are nano particles?
Definition

 

 smaller / tiny or very small

correct size range 1 to 100 nanometre

a few hundred atoms in size

Term

what is the precentage of nitrogen in potassium nitrate(KNO3)

Mr = 101 N=14

Definition
14/101 x 100= 13.8
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