Brainscape's Knowledge GenomeTM

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


See full index

GCSE Chemisty > C3 chemical quantities and calculations > Flashcards

C3 chemical quantities and calculations Flashcards

You may prefer our related Brainscape-certified flashcards:
GCSE Religious Studies - Edexcel Route A flashcards GCSE Religious Studies - Eduqas Route A flashcards GCSE Geography - AQA flashcards GCSE Religious Studies - Edexcel Route B flashcards GCSE Religious Studies - Eduqas Route B flashcards
1
Q

Conservation of mass

A

No atoms are lost or made during a chemical reaction

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

Relative atomic mass

Ar

A

Mass of carbon 12 isotope is used as a standard for atomic mass

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

Relative formula mass

A

Sum of the relative atomic masses

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

Uncertainty

A

Printed on the apparatus

Shows how accurate the equipment is

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

Range

A

The difference between the highest and the lowest measurement

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

Mean

A

Adding all results together and dividing by the number or results

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

Percentage uncertainty equation

A

Range of measurements/ mean x100

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

Moles

A

Mass of 1 mole of a substance in grand is equal to its relative formula mass
Measurement for chemical amounts

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

Avogadro’s constant

A

The number of atoms, molecules or ions in a mole of a given substance
6.02 x10(23) per mole or mol-1

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

Calculating molar mass

A

Find relative atomic masses in the formula and add them up

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

Masses of substances

A

Molar mass of sub A/ mass of reactant A =
Molar mass of sub B/ mass of product B
Or
Mass of B= mass of A x mm of B/ mm of A

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

Predicting masses

A
  1. Find molar mass

2. Use the number of moles from the equation to find the ratio

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

Mass of chemical

A

Molar mass x number of moles

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

Concentration of a solution

A

Measured as the mass of solute dissolved per specific volume of solution
Mass of solute/volume

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

%yield

A

Is a way of comparing the mass of product to the mass expected to make
Actual yield / max theoretical yield x100

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

Atom economy

A

A measure of the amount of starting materials that end up as useful products.
We need high atom economy

17
Q

% atom economy of reaction

A

Relative formula mass of desired product/ sum of relative formula mass of all reactants x100

18
Q

Titration

A

Wear goggles
Fill burette with acid, record start volume
Pipette 25cm3 of alkali into conical flask using pipette filler
Put few drops of indicator in flask
Slowly add acid to flask when indicator changes colour record volume
Repeat to get 0.1 towards trial

19
Q

Concentration of acid

A

Amount of moles/ volume in dm3

GCSE Chemisty (10 decks)

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