T8:Analysis

Question 1

What is a PURE substance in chemistry?

Answer 1

Something only containing 1 COMPOUND or ELEMENT.

Question 2

How can you test for the purity in a sample?

Answer 2

Measure it’s M/B point and compare with results of pure thingy.
The closer the value, the purer it is.

Question 3

How will impurities affect your sample?

Answer 3

Will lower MP and M-range.

Will ^ BP and B-range.

Question 4

What are FORMULATIONS?

Answer 4

Useful mix with a precise purpose .
Each component is in a precise quantity and contributes to the properties of the formulation so that its required function.

Question 5

Whats are paints formulations made of?

Answer 5

PIGMENT
SOLVENT-dissolve other and alter viscocity.
BINDER-resin.Makes a film to hold in place.
ADDITIVES-change physical and chem.properties.

Question 6

Why are formulations important in the pharmaceutical industry?

Answer 6

V.important
e.g By altering the formulation of a pill, can deliver to correct part of body in correct conc. SO THAT IT IS CONSUMABLE AND HAS A ONG ENOUGH SHELF LIFE.

Question 7

Where can formulations be found in everyday life?

Answer 7

Cleaning products ,fuels ,cosmetics, fertilisers, metal alloys and food and drink.

Question 8

What might you find on packaging? Give an example of of what it may say:

Answer 8

May find info on packaging which let you choose one with right compos.4u and tells you it its formul.
e.g Ratio/percentage of each component .

Question 9

What is chromatography?

How is it useful?

Answer 9

An analytical method used to separate substances in a mix.
Can use to identify the substance .
Different types.

Question 10

What 2 phases does chromatography have?

Answer 10

MOBILE- molecules can move, liquid/gas.

STATIONARY- molecules can’t move, solid/really thick liquid.

Question 11

What happens during chromatography?

Answer 11

• Substances in sample constantly MOVE between the mobile and stationary phases EQUILIBRIUM
• 9EDIT)