Thanks gpssonar,
I agree you could do an experiment like that but I would need to know the size of the cell he used,
I have plenty of metered variable voltage & current limit power supply's up to 40v & 50a plus a 0-600v 110ma supply & plenty of distilled water and rain water,
a test you could do for water resistivity uses 1cm x 1cm plates spaced @ 1cm and shows resistivity for distilled water in the 18 million ohms region,
To get the 1cm test down to 4000ohms/cm you need about 125 ppm tds & 600ohms about 835ppm tds
Stan's chart gives a value of 78.54ohms for distilled water @ <2ppm tds,
we could calculate the plate size and spacing needed to reduce the 18 million ohms of distilled water in the 1cm test down to the 78ohms of Stans chart.
I agree you could do an experiment like that but I would need to know the size of the cell he used,
I have plenty of metered variable voltage & current limit power supply's up to 40v & 50a plus a 0-600v 110ma supply & plenty of distilled water and rain water,
a test you could do for water resistivity uses 1cm x 1cm plates spaced @ 1cm and shows resistivity for distilled water in the 18 million ohms region,
To get the 1cm test down to 4000ohms/cm you need about 125 ppm tds & 600ohms about 835ppm tds
Stan's chart gives a value of 78.54ohms for distilled water @ <2ppm tds,
we could calculate the plate size and spacing needed to reduce the 18 million ohms of distilled water in the 1cm test down to the 78ohms of Stans chart.