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Chemistry
GCSE

Explain in terms of particles and collisions how concentration, temperature and addition of a catalyst affect the rate of a reaction.

Concentration: the higher the concentration, the more particles in the same volume. The increase in particle numbers causes an increase in particle collisions, so the rate of reaction increases.Temperatur...

Answered by Emily W. Chemistry tutor
8391 Views

Name and explain the process in which crude oil is separated into fractions. (5 marks)

The process is fractional distillation: the separation of a mixture using heat. The crude oil is heated and the mixture will evaporate. The mixture will then rise...

Answered by Emily P. Chemistry tutor
2172 Views

Describe the bonding present in a piece of sodium metal.

A lattice of positive sodium ions with a sea of delocalised electrons distributed around them. The metallic bond consists of the electrostatic force of attracion between the positively charged sodium atom...

Answered by Mark C. Chemistry tutor
11025 Views

11.25g of hydrated copper (II) sulfate is heated to constant mass. The new mass is found to be 7.19g. What is the formula of the hydrated copper (II) sulfate?

Hydrated Copper (II) sulfateThe hydrated term means that this compound contains water of crystallisationWater of crystallisation means that there are chemically bonded water molecules wit...

Answered by Una M. Chemistry tutor
6031 Views

Describe what the Activation Energy for a reaction is.

The activation energy is the minimum amount of energy that particles need to collide with for the reaction to occur.

Answered by Adi R. Chemistry tutor
1469 Views

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