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Why are complex ions containing transition elements coloured?

Firstly a transition element is an element which forms one or more stable ions with incompletely filled d orbitals.Ligands are charged or neutral, ions or molecules, which form coordination bonds with a cent...
JR
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How can you tell if a reaction is feasible and what factors contribute towards this?

A reaction is said to be feasible or spontaneous when the Gibbs Free Energy ( Delta G) of the reaction is <0. Conversely, when the Gibbs Free Energy ( Delta G) of the reaction is >0, a reaction is said...
JR
Answered by Jamie R. • Chemistry tutor
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Explain why there is a general increase in the first ionisation energy across the third period.

The first ionisation energy depends on:the charge on the nucleus, the distance of the outer electron from the nucleus, the amount of shielding by inner electrons and whether the electron is alone in an orbit...
MP
Answered by Mara P. • Chemistry tutor
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Describe how you would distinguish between separate samples of the two 2 0 4 stereoisomers of CH3CH2CH2CH2CH(OH)CN [2 marks]

(Plane) polarised lightEnantiomers would rotate light in opposite directions ill explain in more detail.
AJ
Answered by Aitisam J. • Chemistry tutor
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How do you describe the process of recrystallisation to purify a product?

When describing the process of recrystallisation, it is important that every step is mentioned. Firstly, the impure product must be dissolved in a minimum amount of hot solvent. The hot solution should then ...
CR
Answered by Chris R. • Chemistry tutor
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