S2440 Week 3 Asyn_Extraction of zinc (copy)

Question 1

Properties of zinc?
Commonly found as ca____ or sp_____

Answer 1

• Low melting and boiling point
• zinc is found in brass, made into brass by romans

Question 2

Difficulty in producing zinc, few zinc objects

Answer 2

• reduction into pure metal occurs at a higher temperature than zinc’s boiling point
• can’t be formed as a solid block, evaporates

Question 3

How did the roman’s produce brass?

Answer 3

Question 4

Evidence for roman brass making crucibles
Also difficulties with the process

Answer 4

• small scale production
• hard to measure proportion of zinc going into brass

Question 5

Diagram of zinc distillation

Answer 5

Question 6

Diagram of smelting zinc using retorts

Answer 6

Question 7

what is spelter?

Answer 7