Industial Chemistry

Question 1

Metal + Oxygen

Answer 1

Metal Oxide

Question 2

Metal + Water

Answer 2

Metal Hydroxide + Hydrogen

Question 3

Metal + Steam

Answer 3

Metal Oxide + Hydrogen

Question 4

Metal + Dilute Acid

Answer 4

Salt+ Hydrogen

Question 5

Metal State

Answer 5

Solid

Question 6

Metal Oxide State

Answer 6

Solid

Question 7

Metal Hydroxide State

Answer 7

Aqueous

Question 8

Cold Water State

Answer 8

Liquid

Question 9

Steam State

Answer 9

Gas

Question 10

Hydrogen State

Answer 10

Gas

Question 11

Salt State

Answer 11

Aqueous

Question 12

Dilute Acid State

Answer 12

Aqueous

Question 13

Displacement Reaction

Answer 13

Reactivity Table:
-More reactive always in compound
-If so no reaction

Question 14

Electronegativity

Answer 14

Strength with which atoms of an element attract electrons when chemically combined with another element.

Question 15

Oxidation

Answer 15

-Lose of Electrons (e- in products)
-Lose Hydrogen
-Gain Oxygen (Oxidized)
-Increase Oxidation Number/State

Question 16

Increase Oxidation Number

Answer 16

Oxidation occurs to reductant or reducing agent

Question 17

Reduction

Answer 17

-Gain of Electrons (e- in reactants)
-Gain Hydrogen
-Lose Oxygen (Oxidized)
-Decrease Oxidation Number/State

Question 18

Decrease Oxidation Number

Answer 18

Reduction occurs to oxidant or oxidizing agent

Question 19

Oxidation Number Rules

Answer 19

1. sum of all oxidation numbers = charge of substance
2. F in compound = -1
   3.Group 1 in compound = +1
3. Group 2 in compound = +2
4. Group 7 in compound = -1
5. H2 = +1
6. O2 = -2
   8.Element alone = 0

Question 20

Electrolysis

Answer 20

Breakdown of an ionic compound, molten or in aqueous solution, by a passage of electricity

Question 21

Anode

Answer 21

+ charge
attracts anions
place of Oxidation

Question 22

Cathode

Answer 22

• charge
  attracts cations
  place of Reduction

Question 23

Electron flow

Answer 23

From Anode to Cathode

Question 24

Electroplating

Answer 24

Thin layer of desired metal used to coat another object.

Question 25

Why Electroplate?

Answer 25

- Protect from corrosion and rusting. - Improve appearance - Cheaper for mass production

Question 26

Draw electroplating

Answer 26

Question 27

Explain the process of electroplating a teapot with silver

Answer 27

1. Electrolyte must contain Ag cations 2. Silver at anode to supply silver cations for oxidation. Ag is reduced Ag(s) --> Ag+(aq) + e- 3. Silver cations attract to cathode with teapot (neg. charge) for reduction. Ag+(aq) +e- --> Ag(s)

Question 28

Carbon on Reactivity Table

Answer 28

Extract metals less reactive than carbon from ores via displacement

Question 29

Extraction of Aliminium

Answer 29

1. purify by crushing ore and dissolve aluminum oxide in sodium hydroxide Al2O3(s) + 2NaOH(aq) ---> 2Na Al02(aq) + H2O(l)