Friday, 31 March 2017

Hard water

Today, we're going to test the hardness of water.
We need some reagents:

We carry out dosage experiment:
 eriochrome turned from pink to blue:

With tap water, we need 1 mL of EDTA
With Hepar water, we need 19 mL of EDTA.
With sea water, we need 75 mL of EDTA

sea water is very very hard!
tap water is not that hard.

Hugo, Mathéo 1STL

No comments:

Post a Comment

Note: only a member of this blog may post a comment.