Timeline:
Week 1
Learn about our two important formulas and start to understand the principles of the internal (pg 8-16)
Week 2
Practice titrations and calculations, learning how to use the equipment correctly (pg 16-28)
Week 3
Complete the internal, both the practical and the experimental.
Titration notes Day 2 (Thur 12th March)
You will be given these prompts in the internal but this explains what to put for each subheading in your report:
Aim -
Method - The steps you took. Any notifications you made and why you made them. (M)
Results - Physical raw experiential data. E.g. titration data of titre volumes. (A)
Calculations - Using n=m/M and c=n/v to calculate the concentration of the unknown chemical. (A/M)
Discussion - How did you control significant variables to improve your quality of data. (A,M,E)
Using pipettes not measuring cylinder (more accurate)
Measured volumes to the bottom of the meniscus.
Stirred thoroughly to ensure all chemicals were dissolved and evenly mixed
Wash all equipment.
Have different people confirm the results.
Cover all chemicals and not out of the sun when not using them.
A - State the variables you controlled.
M/E - Relate this to the collection of quality data.
Conclusion -
State your final concentration value in appropriate units. (Could be included in your calculations section)
Appropriate units are gL-1
Compare your value to any values provided.
How you calculate the appropriate units:
Mol/L (concentration) x g/mol(molar mass) = g/L
This internal can be completed either online or on a paper copy. If you wish to do this online then open the attached google doc and make a copy.