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Chemistry
A Level

Describe and explain the reactivity trend of the Group 2 elements

The group 2 elements become more reactive down the group. This is because the atomic radius increases down the group as there are more energy levels. There is also more shielding from inner energy levels ...

Answered by Libby E. Chemistry tutor
5561 Views

State and explain the tests necessary to positively identify an unknown sample as copper carbonate

If portion of the unknown were to be placed in a blue Bunsen flame, a green-blue flame would appear. This indicates the presence of copper. If a portion of the unknown were to be added to dilute hydrochlo...

Answered by Matthew S. Chemistry tutor
5076 Views

4.00 g metal carbonate, MCO3 reacts with acid to liberate a gas that occupies 0.5878 dm3 at 25˚C and 2.0 x 105 Pa. Identify the group 2 metal, M. Info: R = 8.314 J K-1 mol-1

First it is important to recognise that this is an ideal gas equation question – the exam boards love these so try to get used to spotting if you have the necessary quantities. This is a multi-step proble...

Answered by Isabel D. Chemistry tutor
4210 Views

Liquid ammonia (NH3) and water (H2O) both show hydrogen bonding, describe what a hydrogen bond is and what it is conferred by

A hydrogen bond forms between the positive dipole of one molecule and the negative dipole of another molecule. They can be represented on a diagram with a dashed line perpendicular (at 90˚) to the bond an...

Answered by Ben H. Chemistry tutor
15680 Views

Explain how CH3CH2CHO can react with a Grignard reagent to produce CH3CH2CH(OH)CH2CH3. State the reagents and give the mechanism.

Use the Grignard reagent CH3CH2MgBr. CH3CH2CHO + CH3CH2MgBr ---> CH3CH2CH(OH)CH2CH3 step on...

Answered by Jenny C. Chemistry tutor
7070 Views

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