Section 11.5- Copper

Question 1

copper occurs occasionally as a free element in the earth’s crust but is usually found in the ores

Answer 1

1. chalcopyrite
2. cuprite
3. malachite

Question 2

chalcopyrite contains iron and copper; it is first ______________ under the proper conditions of oxygen supply and temperature to convert the iron in the ore into iron (III) oxide

Answer 2

roasted (heated to temperatures below its melting point)

Question 3

blueish-green and forms a tough, adherent coating that prevents firther reaction of the underlying copper

Answer 3

patina

Question 4

an alloy of copper and ZINC

Answer 4

brass

Question 5

an alloy of copper and TIN

Answer 5

bronze

Question 6

uses of copper

Answer 6

1. electrical wiring
2. cookware
3. piping and roofing materials