Chemistry C3 4.5 Chemical analysis.

HideShow resource information
What do scientists working in environmental monitoring, medicine and forensic science all need to do?
Analyse substances.
1 of 10
What do scientist’s do with the results of their analysis?
They are often matched against existing databases to identify substances (or suspects in the case of forensics).
2 of 10
What are some of the purposes that chemists and other scientists use a variety of methods to analyse substances?
Environmental, medical and forensic investigations.
3 of 10
What methods may scientists use to analyse substances?
They may use traditional ‘wet chemistry’ methods or instrumental methods such as gas chromatography and mass spectrometry.
4 of 10
What are qualitative methods of analysis used for?
To find out simply if a substance is in a sample, such as tests for ions.
5 of 10
What are quantitative methods of analysis used for?
To find out how much of a substance is in a sample, such as titrations and gas chromatography-mass spectrometry.
6 of 10
What has been built for the identification and monitoring of substances?
Large databases of the results of analyses have been built up with the aid of computers. These are used to identify substances in samples, to identify individuals, or to monitor changes in amounts of substances over time.
7 of 10
When is it necessary to use quantitative analysis?
When we need to know how much or the quantity of a substance in a sample.
8 of 10
Why is it necessary to have a large database for DNA analysis to be used to identify individuals?
DNA results/profile are different for every individual.
9 of 10
**YOU WILL BE GIVEN INFORMATION OF DIFFERENT CONTEXT IN THE EXAM BUT NEED TO APPLY THE SAME KNOWLEDGE LEARNT.
**YOU WILL BE GIVEN INFORMATION OF DIFFERENT CONTEXT IN THE EXAM BUT NEED TO APPLY THE SAME KNOWLEDGE LEARNT.
10 of 10

Other cards in this set

Card 2

Front

What do scientist’s do with the results of their analysis?

Back

They are often matched against existing databases to identify substances (or suspects in the case of forensics).

Card 3

Front

What are some of the purposes that chemists and other scientists use a variety of methods to analyse substances?

Back

Preview of the front of card 3

Card 4

Front

What methods may scientists use to analyse substances?

Back

Preview of the front of card 4

Card 5

Front

What are qualitative methods of analysis used for?

Back

Preview of the front of card 5
View more cards

Comments

No comments have yet been made

Similar Chemistry resources:

See all Chemistry resources »See all Analysing substances resources »