Add 100 cm3 of commercial bleach to 500 cm3 of water. In a fume-cupboard, add
concentrated hydrochloric acid drop by drop, with constant stirring, until a drop of the
solution is just acid to litmus. This solution must be freshly prepared.
concentrated hydrochloric acid drop by drop, with constant stirring, until a drop of the
solution is just acid to litmus. This solution must be freshly prepared.
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