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Chemistry
A Level

Define the term 'first ionisation energy' and explain why the first ionisation energy shows a general increase across period 2

The first ionisation energy is the energy required to remove an electron from each atom in one mole of gaseous atoms to produce +1 charged gaseous ions.The first ionisation energy shows an general increas...

Answered by Naledi N. Chemistry tutor
4359 Views

Explain why Silicon Dioxide has a higher melting point than Sulfur Trioxide.

Silicon Dioxide has a macromolecular/giant covalent structure which means it has covalent bonds between all atoms in its structure. Sulfur Trioxide has a simple molecular...

Answered by Holly T. Chemistry tutor
16204 Views

What are 'Rate equations' and why are they useful?

The rate equation of a reaction is useful to describe the relationship between the rate of a reaction and the concentration of its reactants. It is used to determine how a change in the concentration of a...

Answered by Joshua M. Chemistry tutor
2223 Views

Explain why bromine reacts more readily with phenol than benzene

Benzenes bonding consists of sideways overlap of PI bonds between carbons in the ring. due to the extensive overlapping and the PI bond not being held between two atoms the electrons are said to be deloca...

Answered by Molly A. Chemistry tutor
9447 Views

Excess KCN(aq) is added to a solution of [Co(H2O)6]2+. Identify the complex ion formed and predict its shape and charge.

[Co(CN)6]4-CN has -1 charge so overall charge is -4. CN- is similar sized ligand to H2O so shape is unchanged and remains octahedral.

Answered by Jack J. Chemistry tutor
3448 Views

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