Quote:
Originally Posted by brad
Doing any titration, I add a bunch of drops before any color change persists after mixing, then it changes 1 drop at a time for a bunch more drops, then it stops changing no matter how much I add. When is it complete?
Most of the kit directions say "until the vial turns orange or pink" or "until a clear blue color is reached". In those cases, should I stop when a casual observer would call the color "orange", "pink", "blue" etc?
I remember in chemistry in class, we were told a titration isn't complete until the color can't change any more. Unless your familiar with the end color, you have to add 1 drop past where it stops changing and remember where you were at.
Which is correct? This makes a big difference, 30ppm Ca or 1dhk alkalinity or more.
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I've heard it both ways. I too am struggling with this. If I go to the point where the color shifts and stays my readings would indicate a normal range. Which tests are you using? I am using Red Sea Pro.
I am also in Hudson and would be interested in getting together to compare notes / technique.