Water Quality

[Jeanne Rast]

Hi all,

I am wondering how you make a salinometer that is accurate? I have seen and tried all of the ideas from the videos-using a straw and clay, using a pipette and sand, etc. However I do not see how that can be accurate to within .5% as stated in the rules at the State level.

Any suggetions are appreciated.

[Dugger, Jaclyn]

I think the accuracy with this device has more to do with the precision of the markings your student made when they were calibrating the device. Try starting with 0 and 10% solutions and have them calibrate it.

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Kind regards,

Jaclyn Dugger

DCHS Science Department

Science Olympiad Head Coach

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