Posts: 1
Joined: Sat Jan 04, 2014 12:29 pm
Occupation: Parent or 6th and 11th graders

Evaporation of Chlorinated versus Non Chlorinated water

Postby lovetosurf » Sat Jan 04, 2014 3:16 pm

All things being equal and the amount of water is equal, which would evaporate more? Non chlorinated water or chlorinated?

Former Expert
Posts: 1415
Joined: Sat Nov 08, 2003 11:27 pm
Occupation: Planetary Scientist

Re: Evaporation of Chlorinated versus Non Chlorinated water

Postby tdaly » Mon Jan 06, 2014 8:55 am

Hi lovetosurf,

Based on the "Project Question" you have associated with your user profile, it sounds like you got some unexpected results from your experiment. Correct me if I'm wrong - but, you hypothesized that chlorinated water would evaporate faster, but your data showed that non-chlorinated water evaporated faster. Is that correct?

How were you measuring evaporation? And, where did you get the chlorinated water (e.g., from a swimming pool)? Chlorine can evaporate from water, but depending on how you measure evaporation you might not be able to account for that. And, if there are other chemical (e.g., swimming pool water), that might play a role in your results. Post back with those details, and I'll be able to help you a bit more.

Good for you for thinking critically about your results!
All the best,

Return to “Grades 6-8: Getting Ready for the Science Fair”