Chemistry Unit 2

Question 1

What’s a homologous series?

Answer 1

Compounds with the same general formula and have similar chemical properties

Question 2

What’s the three homologous series areas?

Answer 2

Alkane,Alkene,Cycloalkane

Question 3

A general increase in mp/bp of a homologous is caused?

Answer 3

By increasing attractive forces between molecules as the molecules get bigger

Question 4

What’s the general formula?

Answer 4

A ratio that tells you how many hydrogen atoms a hydrocarbon has if you know how many carbons it has vice versa

Question 5

Alkanes?

Answer 5

Saturated(single bonds)
GF= CnH2n+2
Ends in ane
Used as fuels
Insoluble in water

Question 6

Alkenes?

Answer 6

Unsaturated(double bonds)
GF=CnH2n
Ends in ene
Insoluble in water
Used in polymers and alcohol

Question 7

Cycloalkanes?

Answer 7

Saturated(single bonds)
GF=CnH2n
Start-Cyclo End-ane
Used as fuels & solvents
Insoluble in water

Question 8

Explain the process of hydrogenation?

Answer 8

Reacting Alkenes with hydrogen will turn them into alkanes

Question 9

How do you test if a chemical is unsaturated?

Answer 9

With bromine solution

Question 10

What are isomers?

Answer 10

Compounds with the same chemical formula but different structural formula

Question 11

Alcohols general formula?

Answer 11

CnH2n+1OH

Question 12

What’s alcohols functional group?

Answer 12

Hydroxyl group

Question 13

Uses of alcohols?

Answer 13

Fuels as they’re highly flammable and burn with a clean blue flame, also used as solvents

Question 14

What’s Carboxylic acids functional group?

Answer 14

Carboxyl which is -COOH
Ends in -anoic acid

Question 15

Uses of Carboxylic acids?

Answer 15

Preservatives, flavourings

Question 16

What’s a combustion reaction?

Answer 16

When a substance reacts with oxygen to release energy

Question 17

What does alcohols contain?

Answer 17

Carbon, Hydrogen & oxygen

Question 18

What’s sulfur dioxide?

Answer 18

Gas that can cause acid rain

Question 19

What’s nitrogen dioxide?

Answer 19

Gas that causes acid rain

Question 20

What’s carbon monoxide+soot?

Answer 20

Formed due to incomplete combustion of a hydrocarbon

Question 21

What’s a incomplete combustion?

Answer 21

Not enough oxygen

Question 22

How do you test if CO2 is present?

Answer 22

When limewater goes from clear to cloudy

Question 23

How do you test for H2O?

Answer 23

When colbalt chloride goes from blue to pink

Question 24

What’s vinegars second name

Answer 24

Ethanoic Acid

Question 25

What’s your products of a complete combustion?

Answer 25

Carbon dioxide & water

Question 26

What does metal oxides form?

Answer 26

Salt + Water

Question 27

What does metal hydroxides form?

Answer 27

Salt + Water

Question 28

What does metal carbonate form?

Answer 28

Salt + Water + CO2

Question 29

What’s does the term soluble mean?

Answer 29

Dissolves (usually in water)

Question 30

What does the term insoluble mean?

Answer 30

Does not dissolve (usually in water)

Question 31

What does the term solute mean?

Answer 31

The substance that gets dissolved

Question 32

Solvent?

Answer 32

What the solute dissolves in

Question 33

What does the term solution mean?

Answer 33

Final mixture of solvent and solute

Question 34

What is a standard solution?

Answer 34

Accurately known concentration

Question 35

What are concordant values?

Answer 35

Values within 0.2 of each other

Question 36

What’s the melting point?

Answer 36

The temperature at which a solid turns into a liquid

Question 37

What’s the boiling point?

Answer 37

The temperature at which a liquid turns into a gas

Question 38

What is reaction rate?

Answer 38

The speed that a chemical reaction takes place in

Question 39

What transition metals often make good catalysts?

Answer 39

Platinum, Rhodium (used in car catalytic converters)

Question 40

Explain reaction rate graphs?

Answer 40

The steeper the line the faster the reaction Flat lines mean the reaction has stopped

Question 41

What’s the reaction rate formula?

Answer 41

Rate= quantity/time

Question 42

Whats Carboxylic acids general formula?

Answer 42

CnH2n+1COOH

Question 43

What’s an exothermic reaction?

Answer 43

A reaction which releases heat energy

Question 44

What’s the formula to see how much energy is in a fuel?

Answer 44

E=mcDeltaT

Question 45

What’s an endothermic reaction?

Answer 45

A reaction where energy is absorbed from the surroundings

Question 46

What’s the meanings of E=mcDeltaT

Answer 46

E= energy being released in KJ M= Mass is substance being heated C= Specific heat capacity DT= Change in temperature

Question 47

What does metal oxides make?

Answer 47

Alkali solutions

Question 48

What does non-metal oxides make?

Answer 48

Acidic solutions

Question 49

What is three pieces of apparatus?

Answer 49

Burette, Pipette, Conical flask

Question 50

What are your -ate ions?

Answer 50

Sulfate, Nitrate, Chlorate

Question 51

What are your -ite ions?

Answer 51

Similar to -ate ions

Question 52

What are your -hydroxide ions?

Answer 52

Has that formula OH

Question 53

What are your -Ammomnium ions?

Answer 53

Has the formula NH4

Question 54

What’s an indicator used for?

Answer 54

To show that the reaction has ended

Question 55

Why do you use a DC supply

Answer 55

To identify the products