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QUANTATIVE CHEMISTRY (Avogadros constant (6.02 x 10*23 =…
QUANTATIVE CHEMISTRY
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Reacting masses
Work out the number of moles I the whole chemical equation and then re-arrange the equation to work out the mass
If there is a number in front of the element : if the element has a 2 in front this means that 2 moles of this reactant is needed to make 1 mole of the product . So, the moles equation is used to work out the number of moles in this element. This is used to work out the number of moles in the product. The moles equation is then re-arranged to work out the mass.
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Conservation of mass
In a chemical reaction, atoms aren't lost or gained so the mass of the reactants equals the mass of the products
Charge on ions
Metals form positive ions as they lose electrons from their outer shell and non-metals form negative ions as they gain electrons
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Limiting reactant
The reactant with the least amount of moles is the limiting reactant as this is more likely to run out
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