The commonest test is to check the electrical conductivity between two electrodes. Pure water has very poor conductivity, but the conductivity improves as more ions are dissolved in it. Sea water has...
Absolutely not. Tap water is clean and free from bugs. Demineralised water is water and very little else (in theory it is 100% pure H2O , but real life and theory are seldom the same)
To remove the minerals from raw water, the raw water has to undergo several process during which energy has to be input to it. As a general rule, any substance with higher than normal energy level...
That depends on conditions. Demineralised water can be a scavenger - it picks-up trace impurities very readily. This is related to dissolved oxygen rather than the water itself.
It is a particular...