Idk

Question 1

What is a metallic bond

Answer 1

the electrostatic attraction between delocalized electrons and positively charged metal ions?

Metallic bonds are characterized by a ‘sea of electrons’ that are free to move around, which contributes to conductivity and malleability.

Question 2

What type of bond is formed between a metal and a non-metal, typically involving the transfer of electrons?

Answer 2

Ionic bond

Ionic bonds result in the formation of charged ions that attract each other.

Question 3

In what type of reaction do metal oxides react with acids to produce salts and water?

Answer 3

Neutralization reaction

This type of reaction typically involves an acid reacting with a base.

Question 4

What is the process called that involves a catalyst to increase the rate of a chemical reaction without being consumed?

Answer 4

Catalysis

Catalysts lower the activation energy required for a reaction.

Question 5

Fill in the blank: Metallic bonds are characterized by _______.

Answer 5

delocalized electrons

Delocalized electrons allow for various properties such as electrical conductivity.

Question 6

What are the products of the reaction between carbonates and acids?

Answer 6

Salt, water, and carbon dioxide

This reaction is common for carbonates such as sodium carbonate reacting with hydrochloric acid.

Question 7

True or False: All ionic compounds are soluble in water.

Answer 7

False

While many ionic compounds are soluble, some, like barium sulfate, are not.

Question 8

What is the formula for sodium chloride?

Answer 8

NaCl

Sodium chloride is commonly known as table salt.

Question 9

What type of bond involves the sharing of electron pairs between atoms?

Answer 9

Covalent bond

Covalent bonds occur between non-metal atoms.

Question 10

Fill in the blank: A _______ is a substance that increases the concentration of hydroxide ions (OH-) in a solution.

Answer 10

Base

Bases can neutralize acids and are often slippery to the touch.

Question 11

What is an example of a strong acid?

Answer 11

Hydrochloric acid (HCl)

Strong acids completely dissociate in water.

Question 12

What do you call the process in which an acid reacts with a base to produce salt and water?

Answer 12

Neutralization

This is a fundamental reaction in acid-base chemistry.

Question 13

What is the term for compounds formed from the reaction of acids with bases?

Answer 13

Salts

Salts are often neutral compounds formed in neutralization reactions.

Question 14

Acid + base =

Answer 14

Salt + water

Question 15

Oswald process

Answer 15

Product: Nitric acid
Platinum catalyst
Input: Ammonia

Question 16

Haber process

Answer 16

Product: Ammonia
Iron catalyst
Input: water, nitrogen

Question 17

Silicon dioxide is a …

Answer 17

Covalent molecule

Question 18

Copper chloride is a …

Answer 18

Covalent network substance

Question 19

Saturated hydrocarbon

Answer 19

Single carbon to carbon bonds

Question 20

Unsaturated hydrocarbon

Answer 20

C=C double bond

Question 21

Polymer

Answer 21

A long chain of monomers

Question 22

Hydroxyl group

Answer 22

Functional group of alcohols

Question 23

Carboxylic acid

Answer 23

Homologous series, COOH

Question 24

Esters

Answer 24

-COO condensation rxn between alcohol and carboxylic acid

Question 25

Fertilisers

Answer 25

Nitrogen Potassium Phosphorous

Question 26

Electrolysis

Answer 26

Using elextric current to extract metal from ore

Question 27

Oxidiation

Answer 27

Loss of electrons by a reactant

Question 28

Reduction

Answer 28

Gain of electrons

Question 29

Lithium +water =

Answer 29

Lithuium hydroxide + hydrogen

Question 30

Factors affecting rate of rxn

Answer 30

Particle size Concentration Temperature Catalyst

Question 31

Signs of a rxn

Answer 31

pH change Temp change Colour change Precipitation- insoluble solid is made Effervescence

Question 32

Intra molecular

Answer 32

Weak

Question 33

Inter molecular

Answer 33

Strong

Question 34

Bases

Answer 34

All alkalis are bases, not all bases are alkaline bases are insoluble in water and neutralise acid

Question 35

H+ ions

Answer 35

Acid has more

Question 36

OH- ions

Answer 36

Alkaline has more

Question 37

What can water do in terms of bonds that other covalent substances can't

Answer 37

Additional bonds between molecules, increases boiling point

Question 38

Valency of transition metals

Answer 38

2+ except silver, valency of 1

Question 39

Mass calculation

Answer 39

We don't know number of moles Do n=cV first, Volume in Litres, then sub answer into n=m/gfm

Question 40

Metallic bonding

Answer 40

Outer electrons are delocalised, produces an electrostatic attraction between positive metal ions and negative delocalised electrons

Question 42

E=cmΔT (units for chemistry)

Answer 42

E (KJ)=c (JKg^-1°C^-1)×m (Kg)×ΔT (°C)

Question 43

How to make an experiment involving heat better, or more accurate

Answer 43

Insulation, eg. Aluminium foil wrapped around

Question 44

Temperature effect on Half life

Answer 44

No effect

Question 45

Changing physical or chemical conditions has what effect on the half life of a substance

Answer 45

No effect

Question 47

Other than food, what is another use for vinegar

Answer 47

Cleaning

Question 48

Precipitation

Answer 48

Two liquids react to form a solid

Question 49

Isotope

Answer 49

Same atomic number Different mass number

Question 50

Isomer

Answer 50

Same molecular formula Different structural formula