Why is the specific conductance of water important.?

Question

What purpose does it serve?
Why does it have to be tested at 25 degrees Celcius?

Answer 1

Water acts as the medium in many processes. 25 deg C is the room temp.

Answer 2

Its importance depends on the use of the water.

The water conductance correlates with the amount of dissolved solids in the water. In many water use applications, it is important to control the amount of dissolved solids.

For instance, in cooling towers (where water is used to cool equipment or air for airconditioning etc), water is constantly evaporting leaving the solids behind. Without control, the water would get more and more dissolved solids until it was like the Great Salt Lake and your equipment would be plugged with precipitating solids and plating out salts.

The conductance could probably be measured usefully at a variety of temperatures but since the conductance will change with temperature, everyone has to agree to a standard temperature in order that measurements can be meaningfully compared.

Answer 3

1. Specific conductance is related to the type and concentration of ions in solution and can be used for approximating the dissolved-solids content of the water. Knowledge of this property gives one a valuable tool for controlling chemical reactions, because the water is a most common solvent.
http://www.luminet.net/~wenonah/hydro/h2o.htm

2. I believe it was agreed simply, as this temperature may be easily maintained in a laboratory.

Answer 4

trust me you wanna know how much water likes electricity if you accidently drop something in water. it gives an estimate of what humans can survive.

it's tested at 25ºC because that's about RT, and is standard