Search our library of Chemistry questions

Top answers

Chemistry

All levels

How do you answer a long answer question on how buffer systems work?

1) First, state how the buffer is prepared by saying that an excess of acid reacts with a base (include the equation for this reaction)

b) Write the overall equation of t...

Answered by Ritvij S. • Chemistry tutor

2544 Views

What is empirical formula and how is it worked out?

This is the lowest/simplest ratio of the molecule. For example propene has the formula C₃H₆

Answered by Emma W. • Chemistry tutor

11836 Views

Why is a diamond harder than graphite if they're made of the same substance?

Both diamond and graphite are made of carbon. Carbon can form a maximum of 4 covalent bonds due to carbon having 4 electrons on it's outer shell. In diamond, each carbon atom forms 4 covalent bonds in ...

Answered by Chantelle C. • Chemistry tutor

52133 Views

Predict the effect of an increase in pressure and temperature on the production of ammonia in the reaction: N2(g) + 3H2(g) <-> 2NH3 (g) , where the change in enthalpy is -92.4 kJ

An increase in temperature and an increase in pressure will have contradictory effects on the reaction.

The effect of an increase in the temperature of a system, on the equilibrium of a r...

Answered by Aaron S. • Chemistry tutor

38719 Views

How can I improve my exam technique?

The best way to improve your exam technique is to do past papers under timed conditions. Be strict with yourself and treat it like an actual exam. Then mark your own paper using the official mark schem...

Answered by Samah L. • Chemistry tutor

4323 Views