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This worksheet is an example of how to work out a biodiesel titration.
Where did the Oil Come From?
1) Fred's French Fries
2) Berty's Slap Chip Shop
Catalyst used (KOH or NaOH) KOH
Base Amount (5g for NaOH, 7g for KOH) 7 [call this a]
Purity of catalyst 90 % /100 = 0.9 [call this b] (eg. 90% pure KOH would be 90/100=0.9)
Divide the Base Amount [a] by the Purity [b] 7 / 0.9 = 7.778 [c]. This is now our Adjusted Base Amount.
Titrate three samples of oil and fill in the details below. If any of the results is significantly different from the others then throw the sample away and titrate another one.
Titration 1 4.9 [call this d]
Titration 2 5.1 [call this e]
Titration 3 5.2 [call this f]
Average [d]+[e]+[f] = 5.066 [call this g]
Total catalyst needed per liter of oil is 7.78 [c] + 5.066 [g] = 12.846 [call this h]
Total Liters of oil to be processed = 113 [call this i]
Total catalyst needed is 12.846 [h] x 113 [i] = 1.451 kg
We will thus add 1.451 kg of KOH into our oil.