G8 Synthesis and Analysis Chemical Quantities and Yields

Gapfill exercise

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   actual      balanced      formula      reactants      Scale      theoretical      theroetical   
Chemists need to know how much of a product they will get from the .

Start with a symbol equation.
Work out the relative mass of each ractant and product. For example CaCO3 - you add together the relative atomic mass of Calcium + Carbon + (Oxygenx3)
Write the relative formula mass under each part of the balanced equation.
the quantities to suit the amounts used in the experiment.

The yield of a synthesis is the quantity of product created from known amounts of starting materials.
The yield is the mass of product after separating it from the mixture, purifying and drying it.
The yield is the mass of product expected if the reaction goes perfectly and there are no losses while purifying, transferring the chemicals etc.
The yield is always less than the yield because in real life there are small losees.

Percentage Yield
This is the percentage of the yield that is actually obtained.
Percentage yield = (actual yield x 100)/theoretical yield