Skip to main content

Estimating the concentration of bleach

Description

Hydrogen peroxide is used to compare the chlorine content of different bleaches and to calculate the concentration of sodium chlorate(I) (sodium hypochlorite) in the bleaches.

Credits

:
This is an experiment from the Practical Chemistry project, developed by the Nuffield Foundation and the Royal Society of Chemistry.
estimating-the-concentrat...



Apparatus Chemicals

Eye protection

Each group of students will need:

Conical side-arm flask (250 cm3)

Bung, with single hole to fit 10 cm3 syringe nozzle

Plastic syringe, to deliver 10 cm3 (Note 1)

Plastic syringe, to deliver 5 cm3 (Note 2)

Delivery tube (see diagram)

Rubber tubing, short length

Water trough or washing-up bowl

Measuring cylinder (100 cm3)

Measuring cylinder (25 cm3)

Beaker (100 cm3)

Clamp and stand, 2

Deionised or distilled water (25 cm3)

Access to the following solutions:

A variety of household bleach solutions (IRRITANT)

Hydrogen peroxide, ‘20 volume’ solution (IRRITANT at this concentration), 10 cm3 per bleach solution

Refer to Health & Safety and Technical notes section below for additional information.

 






Page last updated October 2015

Hydrogen peroxide is used to compare the chlorine content of different bleaches and to calculate the concentration of sodium chlorate(I) (sodium hypochlorite) in the bleaches.

ADDITIONAL INFORMATION

This is a resource from the Practical Chemistry project, developed by the Nuffield Foundation and the Royal Society of Chemistry. This collection of over 200 practical activities demonstrates a wide range of chemical concepts and processes. Each activity contains comprehensive information for teachers and technicians, including full technical notes and step-by-step procedures. Practical Chemistry activities accompany Practical Physics and Practical Biology.