Search our library of Chemistry questions

Top answers

Chemistry

All levels

How can you test for aldehydes and ketones?

Aldehydes can be differentiated from ketones as they give a positive result for the following tests -Tollens' reagent turns from a colourless solution to a silver precipitate.Fehling's solution turns from...

Answered by Gabriella N. • Chemistry tutor

3544 Views

Explain the bonding in a metal complex, compare this to an ionic compound and covalent bonding

Metal complexes are kept together by a 'sea' of free electrons holding the negatively charged metal ions togetherCOMPARED TOIonic - positive ions and negative ions held together in a complex by electrosta...

Answered by Angharad S. • Chemistry tutor

2129 Views

How to predict the bond angle and shape of a molecule of NH3

An atom of nitrogen has 5 valence electrons in its outer shell. Each hydrogen atom in ammonia bonds to the central nitrogen atom and contributes an electron each. This means there are 8 electrons in total...

Answered by Daidria P. • Chemistry tutor

5489 Views

Why does a higher temperature means the rate of reaction is faster?

As you increase the temperature of a system, the particles gain more kinetic energy and move about more. This means that particles are likely to collide more frequently. These collisions are also likely t...

Answered by Daidria P. • Chemistry tutor

2719 Views

Back in 1950s, it was common to have as house cleaning items bleaching solution (containing sodium hypochlorite) and ammonia (used to remove, for example, hair dye stains). However, many people ended up in hospital after using them both, why?

Hypochlorite reacts with ammonia to yield chloramine and water. (emphasise to the students that hypochlorite is an oxidising agent, getting reduced to chloride ions). chloramine is a very toxic gas, since...

Answered by Radu B. • Chemistry tutor

3422 Views