2.1

Question 1

what is relative isotopic mass?

Answer 1

The mass of an isotope compared to 1/12th the mass of carbon 12.

Question 2

What is relative atomic mass ?

Answer 2

The weighted average mass of an isotope compared to 1/12th the mass of carbon 12.

Question 3

What is Mr?

Answer 3

relative mass- the rfm of a formula.

Question 4

No of particles =?

Answer 4

No of moles x avogandros

Question 5

Mass=?

Answer 5

Moles x Mr

Question 6

Mr=?

Answer 6

Mass / moles

Question 7

What does weighed mean ?

Answer 7

Average based on abundance of what you’re measuring

Question 8

What is empirical formula?

Answer 8

Simplest whole number ratio of atoms in a compound

Question 9

Concentration=?

Answer 9

Moles / volume

Question 10

Volume =?

Answer 10

Moles / concentration

Question 11

What is relative Atomic mass ?

Answer 11

Weighted average mass of an atom compared to 1/12th the mass of carbon 12.

Question 12

Nitrate ?

Answer 12

NO3-

Question 13

Carbonate?

Answer 13

CO32-

Question 14

Sulphate ?

Answer 14

SO42-

Question 15

Hydroxide ?

Answer 15

OH-

Question 16

Ammonium?

Answer 16

NH4+

Question 17

Zinc ion?

Answer 17

Zn 2+

Question 18

Silver ion?

Answer 18

Ag+

Question 19

What’s pressure measured in in pv=nrt?

Answer 19

Pascals

Question 20

What’s volume measured in in pv=nrt?

Answer 20

Metres cubed

Question 21

0 C= ?K

Answer 21

273

Question 22

What’s room temp?

Answer 22

25 C

298K

Question 23

What units of gas does n=v/24 use ?

Answer 23

Dm 3

Question 24

What is oxidation in terms of electrons?

Answer 24

LOSS

Question 25

What is reduction in terms of electrons ?

Answer 25

GAIN

Question 26

What is a reducing agent ?

Answer 26

Substance (reactant) that is oxidised

Question 27

What is an oxidising agent ?

Answer 27

Substance (reactant) that is reduced

Question 28

What are the rules of assigning oxidation states ?

Answer 28

``` 123 fluorine =-1 Hydrogen =1 except metal hydrides Oxygen = -2 except f20 and peroxides Chlorine =-1 except w oxygen ```

Question 29

Chlorate ?

Answer 29

ClO (x) -

Question 30

What is not included in ionic equations ?

Answer 30

Spectator ions | Solid ions

Question 31

YOU CANT... (in ionic equations)

Answer 31

CANCEL OUT ATOMS

Question 32

Atom economy=?

Answer 32

Mr of desired product/ Mr of all products | x100

Question 33

What is an alkali ?

Answer 33

A type of base that is able to dissolve in water to form aqueous hydroxide ions, OH-.

Question 34

What are amphoteric substances ?

Answer 34

When substances can behave as acids and bases, e.g. Amino acid molecule

Question 35

What is an example of volumetric analysis ?

Answer 35

Titration

Question 36

What happens during volumetric analysis ?

Answer 36

You measure the volume of 1 solution that reacts w the volume of a different solution

Question 37

what is an acid?

Answer 37

something that releases H+ ions in an aqueous solution.

Question 38

what is a strong acid?

Answer 38

an acid that fully dissociates in solution.

Question 39

what is a weak acid?

Answer 39

an acid that partially dissociates in solution.

Question 40

Percent uncertainty ?

Answer 40

Equipment uncertainty x number of uses ^ divided by measured value x100

Question 41

what kind of reaction has 100 percent atom economy?

Answer 41

addition reaction

Question 42

why would the result of a titration of vinegar produce wrong results and how would the experimental value change?

Answer 42

assume vinegar doesn't contain any other acids-concentration of real vinegar of ethanoic acid would be less than experimental value.

Question 43

WHAT ARE THE UNITS FOR PV=NRT

Answer 43

p=pascals n=moles t=kelvins v=METRES CUBED

Question 44

why is anything described as a salt?

Answer 44

because the H+ is replaced by .... | THIS IS V IMPORTANT

Question 45

what should you include in a definition of an isotope?

Answer 45

ATOMS of an element | w different neutrons

Question 46

what is a mole of a substance?

Answer 46

the amount of a substance that contains as many particles as there are carbon atoms in 12g of carbon 12.

Question 47

instead of weighing scale, say...

Answer 47

balance check the balance the bank account balance

Question 48

WHEN THEY ASK YOU WHAT A SALT IS OR WHY SOMETHING IS A SALT SAY

Answer 48

THE H+ ION OF AN ACID HAS BEEN REPLACED BY A METAL ION.

Question 49

WHEN THEY ASK YOU WHY SOMETHING IS A BASE (IN TERMS OF PROTONS) SAY

Answer 49

IT HAS ACCEPTED A PROTON. IF ITS ONLY ACCEPTED 1 PROTON DON'T SAY ITS ACCEPTED PROTONS.

Question 50

HOW CAN YOU TELL A NEUTRALISATION REACTION HAS TAKEN PLACE

Answer 50

BUBBLES | WHITE SOLID DISSAPEARS

Question 51

WHEN DESCRIBING AN ACID MAKE SURE YOU ALWAYS SAY

Answer 51

PROTON DONOR

Question 52

WHAT ARE SOME INDUSTRIAL USES OF AMMONIA (why was this a question who knows)

Answer 52

FERTILISER | MANUFACTURING: EXPLOSIVES, DYES, HN03

Question 53

WHY DO ISOTOPES REACT THE SAME

Answer 53

they have the same number of protons and electrons, AND ELECTRONS IN THEIR OUTER SHELL.

Question 54

WHEN PLOTTING A GRAPH

Answer 54

ALWAYS DRAW THE LINE OF BEST FIT

Question 55

HOW MANY GRAMS IN A TONNE

Answer 55

1,000,000 (1 MILLION)

Question 56

when describing why something's a catalyst always mention.

Answer 56

that it's regenerated.

Question 57

when an ester forms what 'type of reaction' is it apparently?

Answer 57

esterification/condensation. you can't say dehydration or elimination apparently.