4.4 Production processes

Question 1

Filtration

Answer 1

A seperation method based upon particle size

Question 2

Sedementation

Answer 2

A seperation method based upon density

Question 3

Centrifigation

Answer 3

A sedimentation method used for seperating substances with close-lying densities

Question 4

Evaporation

Answer 4

A seperation method based upon boiling points (you lose the substance with a lower boiling point)

Question 5

Distillation

Answer 5

A seperation method based upon differences in boiling points. It is evaporation without loosing the substance with a lower boiling point

Question 6

Extraction

Answer 6

A seperation method based upon solubility (usually combined with filtration)

Question 7

Adsorbtion

Answer 7

A seperation method based upon adhesion. It uses an adsorbent

Question 8

Batch process

Answer 8

A production process in which specific conditions and raw materials form a product. After that, new settings and raw materials can be used to make another product. The conditions inside the reactor keep changing

Question 9

Block diagram

Answer 9

A schematic representation of a chemical process using blocks and arrows

Question 10

Continuous process

Answer 10

A production process in which there is a continous supply of intial substances and a continuous outflow of reaction products. The conditions at any point inside the reactor are constant throughout the process

Question 11

Molar

Answer 11

An adjective for solution strength, written as M, corresponding to the concentration in moles per litre (mol/L)

Question 12

Molarity

Answer 12

Shows how many moles of a dissolved substance there are in one litre of the solvent

Question 13

Reactor

Answer 13

A large vessel that chemical reactions take place in

Question 14

Recirculation

Answer 14

A process element in a chemical factory in which a substance that was left over after a reaction is reintroduced into a reactor earlier in the process