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Chemistry (Quantitative Chemistry (Concentration (Concentration =…
Chemistry
Quantitative Chemistry
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Titrations
Titration is the slow addition of one solution of a known concentration (called a titrant) to a known volume of another solution of unknown concentration .
This is until the reaction reaches neutralisation, which is often indicated by a colour change
Equipment - Burette, Conical flask, White tile
Percentage Yield is the mass of the product you got by the product you expected to gain times by 100
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Ar and Mr
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Mr is the Relative Molecular Mass, comes from the sum of the Ar of a molecuar
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Volume of gases
Volume = Moles x 24
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24 is the molar volume, the volume that one mole occupies at room temperature
Exo and Endo
Cells and Batteries
In Non-rechargeable cells and batteries, the chemical reactions stop when one of the reactants has been used up. E.g Alkaline batteries
In rechargeable cells and batteries can be recharged because the chemical reactions are reversed when an external electrical current is supplied. Forcing the reaction the other way, therefore the electrons
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Hydrogen Fuel Cells
At the Anode (positive), the Hydrogen oxides and produces Hydrogen ions. The electrons move along the circuit
At the Cathode (negative), the Oxygen reduces and gains the electrons creating the oxygen ions
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