# THE MOLE

Mind Map by rosie_femm, updated more than 1 year ago
 Created by rosie_femm about 5 years ago
23
0

### Description

Helps for calculations on "the mole" and any extra info!

## Resource summary

THE MOLE
1 Moles of a mass
1.1 Moles = Mass/Mr
1.1.1 E.G 2.4 Magnesium= 2.4/24= 0.1 moles
1.2 1 Mole of any substance contains the same number of particles, this number is 6.0x10(23)
1.3 Mass= Moles x Mr
2 Moles of a Solution
2.1 Moles = concentration/Volume
2.1.1 Units of concentration = mol/dm(3)
2.1.2 Unit of volume = dm(3)
2.1.3 E.G 25cm(3) of 0.100 mol/dm(3) of Sodium solution = (0.100 x 25) / 1000 = 2.5x10(-3)
2.2 Most experiments do not use 1dm(3) of solution, much smaller volumes are used, therefore you must convert cm(3) to dm(3)
2.2.1 1 dm(3) = 1000 cm(3)
2.2.1.1 To convert cm(3) to dm(3) divide by 1000
2.2.1.1.1 Or moles = (conc x vol)/1000
3 Moles of Gases
3.1 Moles = Volume (dm3) / 24 (dm3)
3.1.1 OR Moles = volume (cm3) / 24,000 (cm3)
3.2 One mole of any gas at room temp and pressure has the volume of 24(dm3)
4 Yield
4.1 The amount of a product obtained from a chemical reaction is known as the yield
4.1.1 Percentage yield is easier to talk about.
4.1.1.1 This compares the amount of product that the reaction really produces with the maximum amount that it could possibly be
4.2 % Yield = (amount of product actually made / Maximum amount of product possible) x 100
4.3 No atoms are lost or gained, it is not always possible to obtain the calculated amount of yield.
4.3.1 This is because:
4.3.1.1 The reactions may not be completely pure
4.3.1.2 The reaction may not go to completion because it is reversible
4.3.1.3 Some of the product may be left behind in the apparatus
4.3.1.4 Some of the product may be lost when it is separated from the reaction mixture of its other products
4.3.1.5 Some of the reactants may react in ways different to the expected reaction to give unexpected products.

### Similar

Acids and Bases
Elements, Compounds and Mixtures
Alcohols
Atomic Structure
Chemistry Functional Groups Quiz
Block 7 Alkenes and aromatics
Chem 1006 Key Terms
Solutions
Flame tests
Testing for ions
Block 8 Materials Chemistry 1