Purity and Formulations

Question 1

what is a pure substance?

Answer 1

a single element or compound, not mixed with any other substance

Question 2

what is a formulation?

Answer 2

-a mixture that has been designed as a useful product
-They are made by mixing components in carefully measured quantities to ensure that the product has the required properties

Question 3

How can you distinguish a pure substance from the mixture?

Answer 3

-a chemically pure substance will melt and boil at a specific temperature
-impurities in your sample will lower the melting point and increase the melting range of your substance
-impurities in your sample will also increase the boiling point and may result in your sample boiling at a range of temperatures

Question 4

what are some examples of formulations?

Answer 4

Paints, fuels, pills

Question 5

How can you test the purity of a sample?

Answer 5

-by measuring its melting or boiling point and comparing it with the melting or boiling point of a pure substance
-the closer your measured value is to the actual melting or boiling point the purer your sample is

Question 6

why are formulations important to the pharmaceutical industry?

Answer 6

by altering the formulation of a pill chemists can make sure it delivers the drug to the correct part of the body at the right concentration that it it is consumable and has a long enough shelf life