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Describe how crude oil is separated into fractions in industry

Crude oil is made of many hydrocarbons that can have differing lengths. A hydrocarbons length determines it's boiling point due as a

Answered by Ben H. • Chemistry tutor

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What chemical test can be used to differentiate between alkenes and alkanes. Describe and explain the results.

Alkenes decolourise bromine water (orange/brown to colourless) while alkanes cause no change in colour. An electrophilic addition reaction occurs with the alkene. In a reaction between et...

Answered by Sito E. • Chemistry tutor

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why does graphene conduct electricity?

usually covalent structures cannot conduct electricity but graphene is one of the exceptions and this is due to its structure and bonding. It is a giant covalent 2D molecule, hexagonal in shape with 3 cov...

Answered by Charmaine N. • Chemistry tutor

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State the reagents and conditions for the formation of an aldehyde, starting from a primary-alcohol.

Answer: Heat with acidified potassium dichromate (IV), distilling off the aldehyde as it forms.
Explanation: To form an aldehyde from an alcohol the alcohol group must be oxidised. To do this we use ...

Answered by Tom O. • Chemistry tutor

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Use the concept of electronegativity to justify why the acid strengths of ethanedioic acid and ethanoic acid are different. (6 marks)

Stage 1: 1-2 marksFirstly, draw and explain the difference in structures between the two acids.
Stage 2: 3-4 marksThe unionised COOH groups in the ethanedioc acid contain two very el...

Answered by Lima H. • Chemistry tutor

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