Chemical Formulae, Equations and Calculations Flashcards
1
Q
How do you calculate a mole
A
1 mole = 6x10to the power of 23
2
Q
How do you calculate the No. moles
A
mass(g)/mass of one mole(g/mol)
3
Q
What must you do when calculating the No. moles
A
Make all the masses into grams
4
Q
For e.g. if there’s one mole of H20
A
Then there are two moles of hydrogen atoms and one mole of oxygen atoms
5
Q
Lead(II)sulfate
A
This shows that the lead has a charge of 2+ and that the sulfate has a charge of 2-
6
Q
The symbols for Lead(II)sulfate would be
A
PbSO4
7
Q
Transition Metals
A
These often form more than one type of ion and we use roman numerals to indicate their charge
8
Q
What are non-metals classed as on the pH scale
A
They are all acidic except for hydrogen which is neutral
9
Q
What are metals classed as on the pH scale
A
They are all alkaline
