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Chemistry
A Level

How does a catalyst effect the rate of reaction?

Overall the catalyst increases the rate of reaction. It does this by adding an alternative pathway for the reagents to react, this alternative path way has a much lower activation energy than the original...

TC
Answered by Thomas C. Chemistry tutor
2181 Views

How does the structure and bonding of alkanes differ to that of alkenes?

In alkanes, such as propane, the carbon atoms are sp3 hybridised, meaning that each carbon atom has 4 sp3 molecular orbitals associated with it available for covalent bonding. These ...

EG
Answered by Edward G. Chemistry tutor
10410 Views

State and explain the trend in melting points of diamond, iodine and hydrogen fluoride.

Diamond is covalently bonded and has a giant covalent structure. Covalent bonds require lots of energy to break as they are strong so diamond has the hig...

CF
Answered by Ceri F. Chemistry tutor
20083 Views

Explain, in general, how a catalyst works

A catalyst is a material that can speed up a reaction, but reamins chemically unchanged at the end of the reaction. A catalyst works by providing the reactants an alternative rout...

CL
Answered by Chung L. Chemistry tutor
9669 Views

Define and give an example of Le Chatalier's Principle of Chemical Equilibrium.

For any change that occurs in a chemical system, the equilibrium of that system will shift in order to counteract the change being imposed on that system. For example, if the temperature is increased for ...

BC
Answered by Benn C. Chemistry tutor
3154 Views

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