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Explain why transition metal complexes are coloured?

In a complex transition metal ion, the electric field produced by the lone pairs on ligands when they interact with the central metal ion causes the d orbitals to split into two sub levels. As the dx^...

Answered by • Chemistry tutor

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Name the reagent and explain the process of 1-bromoethane into propanoic acid

Produce the Grignard reagentMg in a dry ether (ethoxyethane) with CH3CH2BrCH3CH2Br + Mg ---> CH3CH2MgBrAddition reaction with the Grignard and CO2 to produce a Carboxylic acid Must be hydrolysed using ...

Answered by Oscar W. • Chemistry tutor

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Explain the process of fractional distillation of crude oil

Crude oil is a mixture of several different organic (carbon containing) molecules with different chain length. The different chain lengths mean that theses molecules have different boiling points; the lon...

Answered by Lewis F. • Chemistry tutor

1902 Views

Describe how a sample of Magnesium Chloride crystals could be made from Magnesium Carbonate (MgCO3) and dilute Hydrochloric Acid (HCl). Give the chemical formula for the process (4 Marks)

Add excess Magnesium Carbonate to dilute Hydrochloric acid (1 Mark)Filter solution (1 Mark)Heat the solution to evaporate the excess wat...

Answered by Patrick S. • Chemistry tutor

6104 Views

A chemist needs to neutralise aqueous hydrochloric acid solution (currently pH 1) to pH 7 or higher, so it can be safely disposed of. They have access to solid NaCl, NaBr and Na2CO3.

A) Which of the three solids should they add to the acid solution to achieve this?
ans: Na2CO3 [1 mark]
B) Hence give a balanced chemical equation showing the reaction of the hydrochloric acid w...

Answered by Alexander N. • Chemistry tutor

749 Views