Oxidation and Reduction Flashcards
1
Q
Why was it necessary to dilute the sample of bleach?
A
A very large volume of sodium thiosulfate would be required
2
Q
Describe the procedure for diluting the bleach to an accurate volume of 250 cm3.
A
25 cm3 of bleach was added, using a pipette, to a 250 cm3 volumetric flask. Deionised water was then added to the flask until the bottom of the meniscus was sitting on the mark. It was then stoppered and inverted serval times.
3
Q
Name the instrument used by the student to measure out 25cm3 of the diluted bleach. What precautions should be observed when using this volume of diluted bleach?
A
A pipette. Use a pipette filler and rinse with deionised water.
