Search our library of Chemistry A Level questions

Top answers

Chemistry

A Level

i) Write a full balanced equation for (a) the complete combustion of glucose and (b) the incomplete combustion of glucose. ii) Following from part i) suggest a reason (and explain) the difference with the product in reaction (a) and that of reaction (b).

Part I (4 marks) a) C₆H₁₂O₆+ 6O₂-> 6CO₂+ 6H₂O b) C₆H₁₂O₆+ 3O₂ -> 6C...

Answered by Lavan G. • Chemistry tutor

9295 Views

The boiling points of ammonia (NH3), fluorine (F2) and bromine (Br2) are -33, -188 and +59 degrees celsius respectively. Explain the differences in these boiling points, including the names of any relevant forces and particles.

Differences in boiling points between molecules are due to varying strength of intermolecular forces. From the data given, we know Br₂ must have the strongest intermolecular forces as it has th...

Answered by Alex H. • Chemistry tutor

65720 Views

Explain and draw the mechanism of the nucleophillic substitution reaction between bromoethane and aqueous sodium hydroxide. How is this reaction different to the elimination reaction which may occur?

The d+ carbon on the bromoethane is susceptible to attack by the OH- nucleophile (negative ion with a lone pair)( the lone pair is very important as this carries out the attack!!!).

When the nucleo...

Answered by Charlotte G. • Chemistry tutor

4627 Views

Why does ice float on water?

When water freezes into ice, the H₂O molecules form Hydrogen bonds between each other and arrange themselves into an open lattice structure. This causes the molecules in ice to be further apart...

Answered by James C. • Chemistry tutor

24158 Views