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Chemistry

A Level

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.

Answered by Aitisam J. • Chemistry tutor

9311 Views

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 s...

Answered by Chris R. • Chemistry tutor

10422 Views

Propane and Chlorine react in the presence of UV light to give 2-chloropropane and HCl. Estimate the enthalpy change of this reaction using the following bond enthaplies (KJ/mol) : C-H=+413, Cl-Cl=+243, C-Cl=+346 and H-Cl=+432.

Write equation, ensuring both sides are balanced.CH₃CH₂CH₃+ Cl₂→ CH₃CH(Cl)CH₃+ HCl (2.) Draw structural formula of all reactants ...

Answered by Jasmine W. • Chemistry tutor

29839 Views

Deduce the main organic product for the reaction of benzene with nitric acid in the prescence of sulfuric acid, and provide a complete mechanism for this reaction. (5 marks)

The answer to this question mostly involves drawing of chemical structures and mechanistic arrows.The organic product is nitrobenzene, which students would draw out as part of the mechanism, but must also...

Answered by Erin B. • Chemistry tutor

2645 Views

How does increasing/decreasing temperature affect the equilibrium position of the following reaction: CuSO4.5H2O(s) ⇌ CuSO4(s) + H2O(l) ?

The endothermic and exothermic reactions should be identified. Note: if the forward reaction is endothermic, the reverse reaction will be exothermic with the same ΔH but opposite values.In this example: t...

Answered by Ayesha G. • Chemistry tutor

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