PASCO CI-6729 (1X) CONDUCTIVITY SENSOR - Manual (Page 14)

10
Conductivity Sensor 012–06485B
Some vendors of drinking and mineral water list the total dissolved solids (TDS) in parts per million. Using the rule of
thumb described in the Theory section of the Conductivity Sensor manual and calculate the TDS of the drinking water
and the mineral water.
TDS drinking H
2
O = __________ ppm TDS mineral H
2
O = __________ ppm
Compare your results with those listed on the bottles.
Questions
1. Which sample has the highest level of impurities?
2. Why is it important to have all the water samples at the same temperature?