Steps Involved in Synthesising Chemicals

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C6: Chemical Synthesis
Synthesising Chemicals
1. Choosing the reaction
Chemists need to choose the chemical reaction they want to make their
product
Neutralisation
Precipitation
2. Risk assessment
An assessment of anything that could be harmful or cause injury
What is the hazard?
Who could it harm?
How could it be reduced?
3. Calculating the amount of the reactants needed
Maths and balanced symbol equations are needed at this point. To create a
certain amount of the product, chemists need to work out how much of the
reactants are needed. This is done with equations. It important to include this
stage because they need to make sure no waste is produced ­ waste costs
money!
4. Choosing the apparatus and conditions
Suitable apparatus and conditions need to be used when carrying out a
reaction. The apparatus needs to be the correct size and strength. Chemists
also need to decide what temperature the experiment should be carried out
in and what concentrations (of the reactants) should be used and whether or
not to use a catalyst.
5. Isolating the product
After the reaction is complete the products may need to be separated from
the reaction mixture. This could involve:
Filtration
Evaporation
Crystallisation
Drying
6. Purification
Isolating the product and purification are the same thing. When isolating the
product it will be purified as well (Crystallisation)
7. Measuring yield and purity
The yield tells you about the overall success of the reaction. It compares the
values of what theoretically should have been got and how much was actually
achieved. The purity should also be measured.
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