Australia's Science Forum

Help, need ideas for a prac. for water hardness in water. It was suggested to use phenolphthalein for this prac in place of EDTA. How do we do this? Thanks

We use the Heinmann chemistry prac manual. There is a prac for the analysis of local water which includes a section on hardness of water. This prac uses EDTA and eriochrome black T. Are you interested in a copy I can fax it to you?

Lorrae

how about aquarium water hardness kit. it cost approximately $10, and you can add carbonate or bicarbonate to get different readings

Thanks Lorrae, we have that prac, but was told about another.