Chemical calculations
- Created by: emews
- Created on: 05-11-17 10:15
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- Chemical calculations
- If you know the mass of a reactant and a product, you can use simple ratios to calculate reacting masses and product masses
- You can calculate the amount of a substance (in moles) in a solution if you know the volume and concentration.
- You can also work out the concentration of an acid reacting with an alkali or the other way round.
- Percentage yield
- For a given mass of reactants it's possible to calculate the maximum mass that could be made of a certain product
- The mass is called the predicted yield.
- The actual yield is the mass of product made when the reaction is actually carried out
- A 100% yield means that no product has been lost, while a 0% yield means that no product has been made
- Reasons why the percentage yield might be less than 100%
- loss when filtering
- loss when evaporating
- loss when transferring liquids
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