Chem 13.5

Question 1

Alloys

Answer 1

Mixture of a metal and one or a few other elements (metal/non-metal)
Usually physical heating, melt and mix

Question 2

Change when forming alloys

Answer 2

Addition of different-sized atoms to pure metal distorts original regular sturcture
-> slipping of layers of atoms more difficult -> stronger, harder, less malleable, less ductile (physical property change)
Irregular structure -> lower melting point than component metals

Question 3

Coins

Answer 3

Shopper and nickel for silvery
Nickel and brass for goldish ones

Question 4

Steel

Answer 4

Iron alloy
95 iron 5 carbon
Harder - bridge construction, building frames

Question 5

Stainless steel

Answer 5

Corrosion resistant, 70 iron 20 chromium 9.5 nickel 0.5 carbon
Chromium (lll) oxide (rusting only for iron)
Cooking utensils, tableware, surgical tools (non-toxic!)
Alloying expensive but iron abundant so kinda balance out

Question 6

8 metals, properties and usages

Answer 6

Refer to notes/book

Question 7

Fossil fuels

Question 8

Crude oil and its components

Question 9

How to use crude oil

Question 10

Crude oil functions

Question 11

Describe fractional distillation setup and aspects (3?)

Question 12

Analyse fraction (5)