Top answers

Chemistry
A Level

What is the difference between London dispersion forces and hydrogen bonds?

Both are a type of intermolecular forces which means they act between more than 1 molecules. Do not confuse them with intramolecular forces acting within 1 molecule. Lond...

DS
Answered by Daria S. Chemistry tutor
27698 Views

How does a change in temperature affect the Kc value when the forward reaction is exothermic?

To explain this I will use a made up example question: A2(g) + B2(g) <-> 2AB Change in enthalpy= Negative remember: according to Le Chatlier's principle, if a system in e...

RO
Answered by Ruairi O. Chemistry tutor
11228 Views

Explain the trends in reactivity as you move down group one elements.

As you move down group one atomic radius increases. As a result the attraction to outer electrons is weaker. As there are an increased number of energy levels, shielding to the outer electrons also increa...

JJ
Answered by Jack J. Chemistry tutor
3394 Views

Explain how fractional distillation works.

Hydrocarbons have different boiling points and therefore different condensation points. The linger the hydrocarbon, the more intermolecular forces exerting between each molecule. This means that it requir...

NS
Answered by Nick S. Chemistry tutor
7114 Views

Explain the trend in 1st ionisation energy across the period 3 elements, explaining the anomalies of aluminium and sulfur.

The overall trend is that the 1st ionisation energy increases. This is because as the nuclear charge increases, the attraction of the nucleus to the surr...

JW
Answered by Jack W. Chemistry tutor
11207 Views

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