Water contamination of the flask.

Irene is the Chief Chemist at Razmans Chemicals. She was asked to find the concentration of an unknown acid solution. Describe the titration procedure using the table below.

Place the numbers that relate to the following statements in the appropriate cell in thetable so that a sentence is formed.
1) is placed in the
2) is used to measure the
3) is clamped to the
4) is used to fill the
5) is measured with the
6) is NOT placed in the
7) is NOT used to measure
8) is NOT clamped to the
9) is NOT used to fill the
10) reacts with the

Conical flask
Burette
20ml Pipette
Indicator
Filling bulb
Base solution of known concetration
Unknown acid sample
Ritort stand
Indicator
Unknown acid sample
Base solution of known concetration
Burette
20 ml Pipette
Filling bulb


She was short of flasks when conducting this titration procedure so she decided to wash the flask with water before commencing the second titration. Her assistant, Tom, was shocked when Irene did not bother to dry the flask before adding exactly 10.00 mls of the unknown acid solution into the flask.

Discuss what difference it could make to the results obtained from the first and second titrations.

Click on the coloured cells for more information. Double click to hide the information

Solutions

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