Moles and Equations Flashcards
Mole
The amount of any substance containing as many particles as there are carbon atoms in exactly 12g of Carbon 12
Amount of substance
The quantity whose unit is the mole
Avogadro’s constant
The number of atoms per mole of the carbon-12 isotope
Molar mass
The mass per mole of a substance
Empirical formula
The simplest whole number ratio of atoms of each element in a compound
Inapplicable to giant compounds
Molecular formula
The actual number of atoms of each element in a molecule
Molecule
A small group of atoms held together by covalent bonds
Molar volume
The volume per mole of gas
*one mole of any substance occupies 24dm^3
Anhydrous
A molecule that contains no water molecules
Hydrated
A molecule that contains water molecules
Water of crystallization
Water molecules that form an essential part of the crystalline structure of a compound
Process of carrying out a titration
- Using a pipette, add a measured volume of one solution to a conical flask
- The other solution is put in a burette
- A indicator is added to show when the neutralization is complete
- Add the solution in the burette drop by drop until the indicator changes colour
Methyl orange
Colour in acid: red
Colour in base: yellow
Colour at the end of titration: orange
Bromothymol blue
Colour in acid: yellow
Colour in base: blue
Colour at the end of titration: green
Phenolphthalein
Colour in acid: colourless
Colour in base: pink
Colour at the end of titration: pale pink
