Perchlorates already contain water. Atmospheric water
sublimates off into outer space or ends up at poles as ice.
They stop all the water going away or all ending up at the poles.
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On Thursday, October 8, 2015 at 3:14:53 AM UTC+1, David Staup wrote:
On Wednesday, October 7, 2015 at 9:57:54 PM UTC+1, G=EMC^2TreBert wrote:
On Wednesday, October 7, 2015 at 10:38:40 AM UTC-7, Tony Lance wrote:
The temperature range of liquid water on Earth is 100 degrees.

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On Wednesday, 7 October 2015 18:37:29 UTC+1, Tony Lance wrote:
The Saline Slopes of Mars