1133375
Description
Mind Map by xinyi_hann, updated more than 1 year ago
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Created by xinyi_hann
over 10 years ago
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Mole concept &
volumetric analysis
- Avogadro's number/ Avogadro's constant
- 6.02 x 10^23
- 1 mol of substance contains 6.92 x 10^23 particles
- no. of atoms = no. of moles x Avogadro's no.
- 6.02 x 10^23
- Relative Atomic Mass &
Relative Molecular Mass
- Relative Atomic Mass
- Ar
- ratio of the mass of one atom of an element compared to
1/12 the mass of a carbon-12 atom
- Ar
- Relative Molecular Mass
- Mr
- mass of a molecule of an element of
compound over 1/12 the of one carbon-12
atom
- Mr = sum of all Ar of all the atoms in the molecule
- Mr
- Relative Formula Mass
- Mr
- adding the no. of mols of Ar together
- Mr
- Molar Mass
- mass of 1 mole of atoms of the element
- gmol-1
- no. of moles = mass of substance (g) / molar mass (gmol-1)
- mass of 1 mole of atoms of the element
- Relative Atomic Mass
- Percentage composition of compounds
- given as % by mass of each
element in the compound
- Ar of element x no. of atoms of element in formula /
Mr of compound
- given as % by mass of each
element in the compound
- Formula of a compound
- the empirical formula
- types of elements present
- the simplest ratio of the different
types of atoms in the compound
- element
- % composition or mass
- Ar
- no. of moles = divided by Ar
- molar ratio
- simplest molar ratio
- types of elements present
- the molecular formula
- shows the actual no. of atoms of each element in a molecule
- determined from empirical formula if
the relative molecular mass (Mr) is
known
- empirical formula = AxBy
- molecular formula = (AxBy)n
- n = relative molecular mass (Mr) /
Mr from empirical formula
- shows the actual no. of atoms of each element in a molecule
- the empirical formula
- Concentrayion of a solution
- concentration (gm-3) = mass of solute (g) / volume of solution (dm-3)
- molar concentration(moldm-3) = amount of solute (mol) /
volume of solution (dm-3)
- molar concentration (moldm-3) = concnetration (gdm-3) /
molar mass (gdm-3)
- volumetric analysis
- methyl orange
- yellow - orange - red
- yellow - orange - red
- screened methyl orange
- green - grey - violet
- green - grey - violet
- write a balanced equation
- fill out information given from question under the equation
beneath the appropriate chemical
- work out the number of moles of one reactant
- using the chemical equation, work out how many moles the other
reactant reacts with
- find whatever the question is asking for
- methyl orange
- concentration (gm-3) = mass of solute (g) / volume of solution (dm-3)
- Application of mole concept in chemical equations
- balanced equation
- molar ratio by which the reactant reacts
- state of the reactants and products
- identification of the limiting reagent
- amount of produce obtained
- molar ratio by which the reactant reacts
- balance the equation
- find the no. of moles of all the reactants
- n = cv
- n = mass/ molar mass
- n = cv
- take one of the reactants & calculate how much of the other reactant is required
- termini the limiting reagent
- solve rest of the problem
- balanced equation
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