Brainscape's Knowledge GenomeTM

Browse over 1 million classes created by top students, professors, publishers, and experts.


See full index

Chemistry Nov Mocks > 2.1 Atoms and Reactions > Flashcards

2.1 Atoms and Reactions Flashcards

You may prefer our related Brainscape-certified flashcards:
Periodic Table flashcards Chemistry 101 flashcards AP® Chemistry flashcards Organic Chemistry 101 flashcards
1
Q

what is the proton’s relative charge and mass

A

+1, 1

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
2
Q

what is the neutron’s relative charge and mass

A

0, 1

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
3
Q

what is the electron’s relative charge and mass

A

-1, 1/2000

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
4
Q

what is the formula for the maximum num of electrons in a shell

A

2n^2

n = shell number

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
5
Q

what is the mass number(A)

A

protons + neutrons

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
6
Q

what is the atomic number (Z)

A

number of protons

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
7
Q

what are isotopes

A

atoms of the same element with the same num of protons and electrons but different num of neutrons = diff mass num

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
8
Q

why do isotopes have similar chemical properties

A

they have the same proton number and electron configuration

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
9
Q

why do isotopes have different physical properties

A

they have diff mass number

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
10
Q

what is relative isotopic mass

A

isotopic mass of an isotope relative to 1/12th of the mean mass of an atom of c-12

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
10
Q

what is relative atomic mass(Ar)

A

weighted mean mass of an atom of an element, relative to 1/12th of the mean mass of an atom of C-12

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
11
Q

what is relative molecular mass(Mr)

A

weighted mean mass of a molecule relative to 1/12 the mass of an C-12 atom

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
11
Q

how do you calculate Mr

A

add all the Ars’ of an compound

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
12
Q

how to calculate Ar in mass spect

A

sum of (m/z x abundance)/total abundance

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
13
Q

what is ionic bonding

A

.between metal and non-metal
.electrons are transferred from metal to non-metal
.creates ions

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
14
Q

how to name binary compounds(contain only 2 elemetns)

A

metal,second element-ide

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
15
Q

how to make ionic formulas

A

make the charges of the ions neutral

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
16
Q

what are the needed polyatomic ions(more than one atom)

A

NO3- = nitrate ion
SO4 2- = sulfate ion
CO3 2- = carbonate ion
OH - = hydroxide ion
NH4+ = ammonium ion

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
17
Q

what is the amount of subtance

A

.the number of particles in a substance
.measured in moles(6.02X10^23)

18
Q

how do you calculate number of particles

A

moles x (6.02 x10^23)

19
Q

how do you calculate moles

A

mass/mr

conc x volume(dm^3)

20
Q

what is the molar mass

A

mass per mole (gmol-1)

21
Q

what is the molar gas volume

A

gas volume per mole (dm3 mol-1)

22
Q

what is the empirical formula

A

simplest whole number ratio of atoms in a molecule

23
Q

what is the molecular formula

A

true number of each atom in the molecule

24
Q

what is the water of crystallisation

A

water that is part of crystalline structure

25
Q

what is an anhydrous solution

A

no water of crystallisation

26
Q

what is a hydrated solution

A

contains water of crystallisation

27
Q

what is the ideal gas equation

A

pV = nRT

p =pressure PA
V = volume M3
n = moles mol
R = gas constant 8.31
T = temp K

28
Q

what is the percentage yield equation

A

actual mass/theoretical mass x100

less than 100 = incomplete reactions, loss of products on equipment or side reactions

29
Q

what is the atom economy equation

A

mr of desired product/mr of total reactants x 100

30
Q

what do acids do

A

releases H+ ions in aqueous solution

31
Q

what do alkali do

A

release OH- ions in aqueous solution

32
Q

what are common acids

A

HCl -hydrochloric acid
H2SO4 - sulfuric acid
HNO3 - nitric acid
CH3COOH - ethanoic acid

33
Q

what are common bases

A

NaOH - sodium hydroxide
KOH - potassium hydroxide
NH3 - ammonia

34
Q

neutralisation ionic equation

A

H+(aq) + OH-(aq) –> H2O(l)

35
Q

acid + carbonate –>

A

metalsalt + water + CO2

36
Q

acid + metal oxide –>

A

metalsalt + water

37
Q

standard solution method

A

.weigh solid on 2 dp balance
.transfer to beaker and reweigh
.record difference in mass
.add distilled water and stir with glass rod unti all solid is dissolved
.transfer to volumetric flask with washing
.make up 250cm3 mark with distilled water
.shake flask

38
Q

titration method

A

.fill burette with standard solution ensuring burette is filled with no air bubbles
.use pipette filler and pipette to transfer 25 cm3 of unknown solution into a conical flask
.add two drops of indicator
.record initial burette reading
.titrate contents of conical flask by adding known solution from burette until indicator permanently changes colour
.repeat until results are 0.1cm3 of each other

39
Q

how do you reduce uncertainties in titration

A

increase titre volume

40
Q

oxdiation rules

A

.element = 0
.neutral compound = add up to 0
.charged compound = add up to the total charge
.H = +1
.O = -2
.halogens = -1
.G1 = +1
.in metal hydrides, H = -1
.in peroxides, O = -1

41
Q

what do the roman numerals represent

A

oxidation number

42
Q

what do oxidising agents do

A

.accept electrons = gains electrons = reduced

43
Q

what do reducing agents do

A

donates electrons = loses electrons = oxidised

44
Q

metal + acid –>

A

metalsalt + hydrogen

Chemistry Nov Mocks (3 decks)

Brainscape helps you reach your goals faster, through stronger study habits.
© 2024 Bold Learning Solutions. Terms and Conditions