Question

Theory experiment to determine residual chlorine in water

Answer 1

Answer:

Pour the sample into the middle chamber of the cell of the chloroscope. Add 0.5 mL of 'OT' and mix well with the plunger. Fill the outer chambers with chlorine free distilled water. Wait for 5 minutes. Put the yellow coloured discs in position and compare the colour. Note the reading (A).

As in step 1 first add 'OT', mix quickly and immediately add arsenite reagent. Note the reading (B).