Weighing water can be used to check the precision of the pipette
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Weighing water can be used to check the precision of the pipette

PRACTICAL 1: Basic laboratory skills 

(i) Accuracy when pipetting

1. Tabulate all your data for:

(A) 1000 µl (P1000 pipette)           

(B)  200 µl (P200 pipette)

2. Determine the precision for each pipette (group A and B).

3. Assuming the density of water to be 1.000 g ml-1, which pipette in each group (A and B) was the most accurate? (Note: ignore any negative sign in calculation)

(ii) Dilutions and Buffers

Hint
Science1.  1000 μL  (P1000 pipette) 200 μL  (P200 pipette) 1.   0.9821g 1.   0.1955g 2.  0.9765g 2.   0.1956g 3.   0.9763g 3.   0.1979g 4.   0.9745g 4.   0.1935g ...

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