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Chemistry
A Level

What are electrophilic addition reactions of alkenes?

Alkenes contain a pi bond, which is a site of high electron density, since it contains a pair of electrons delocalised around the two bonded carbon atoms. Because of this, the pi bond can act as a nucleop...

Answered by Jessica M. Chemistry tutor
1782 Views

Why does the Haber process take place at high temperature and pressure?

Reaction : N2 + 3H2---> 2NH3 is in equilibrium The reaction is exothermic (produces heat) so the equilibrium will favor the left at high temperatures following Le Chatelier's principle. This is to redu...

Answered by Phoebe L. Chemistry tutor
7875 Views

Give and explain 2 of the anomalous properties of ice caused by hydrogen bonding (3)

Compared to water ice is less dense this is due to hydrogen bonds in the open lattice holding the H2O molecules apart whereas in liquid form the hydrogen bonds break allowing the molecules of w...

Answered by Zahra B. Chemistry tutor
2837 Views

Explain the trend in reactivity of group 2 elements with water as you go down the group.

As you go down group 2, atom size increases. Larger atoms experience more shielding. There is an increase in nuclear charge going down group 2 elements so you would expect the outer electrons to be held m...

Answered by Megan F. Chemistry tutor
5796 Views

State and explain the general trend in the first ionisation energies of the Period 2 elements Lithium to Fluorine.

The general trend is that the first ionisation energies increase across the period.First ionisation energies increase across the period as from Lithium to Fluorine the nuclear charge is increasing yet the...

Answered by Alice M. Chemistry tutor
4065 Views

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