Topic 8 - Chemical analysis

Question 1

Define a pure substance

Answer 1

Something that contains only one compound or element throughout.

Question 2

1) Which subtances have specific melting/boiling points?
2) How can you test how pure a subtance is?

Answer 2

1) Pure subtances
2) By measuring the boiling and melting point of teh sample and comparing results of the pure subtances; the closer to the actual measurings, the purer the sample is.

Question 3

How do impurities in samples affect the boiling and melting points?
Give 2 ways

Answer 3

It will lower the melting point and increase the melting range of the subtances.
It will also increase the boiling point that can result into the sample boiling at a range of temperatures.

Question 4

Define formulations

Answer 4

Useful mixtures with a precise purpose that are made by following a formula.

Question 5

Why are formulations important in medicine?
Where are they used in everyday life?

Answer 5

1) The chemists can ensure that it delivers the drug to the correct path of the body at the right concentration that it’s consumable and has more shelf-life.
2)