Search our library of Chemistry questions

Top answers

Chemistry

All levels

Can you describe four variables which affect the rate of a chemical reaction and how they affect the rate?

Temperature: A higher temperature increases the rate of a reaction by increasing the number of particles with enough energy to take part in a reaction.
2) Particle size: The smaller the particl...

1973 Views

In the presence of ultraviolet radiation, cyclohexane reacts with bromine. A mixture of cyclic products are formed, including C6H11Br. Discuss each step of this reaction providing equations to show the mechanism.

INITIATION: Br₂ --> 2Br ^. The breaking of the Br₂ bond from ultraviolet radiation forms two radicals, as one electron from the bond p...

Answered by Lisa K. • Chemistry tutor

16613 Views

State how you would test a solution for the presence of sulfate ions? Explain, using an ionic equation, what you would expect to observe in the presence of sulfate ions.

You would add barium chloride solution to the sample to be tested. Group II sulfate solubility decreases down the group - with barium sulfate being insoluble. We would expect to see a heavy white precipit...

Answered by Joshua D. • Chemistry tutor

11281 Views

give a possible reaction mechanism for the conversion of a haloalkane to alcohol

reaction conditions are reflux (ie with heat) with conc. sodium hydroxide. the mechanism is just a standard Sn1 or Sn2 (uni- or di- molecular nucleophilic substition) depending on the haloalkane used. bul...

Answered by Edmund C. • Chemistry tutor

1623 Views

What is the relative molecular mass of ammonia?

Ammonia is NH₃.
Nitrogen has a relative atomic mass of 14.
Hydrogen has a relative atomic mass of 1.
14 + (3 x 1) = 17
Ammonia has a relative molecular mass of 17.

Answered by Adam C. • Chemistry tutor

37608 Views