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phetsims / molarity

"Molarity" is an educational simulation in HTML5, by PhET Interactive Simulations.
http://phet.colorado.edu/en/simulation/molarity
GNU General Public License v3.0
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Tweak so "a couple of solids" appear in context responses (alerts) #148

Closed terracoda closed 5 years ago

terracoda commented 5 years ago

@Matthew-phet, I played with Molarity today and I think everything is looking pretty good.

I noticed that "a couple of solids" rarely or never shows up while increasing concentration, though it shows up while decreasing concentration.

I'm wondering if you want to tweak that, so "a couple of solids" is announced at least once when that state is true.

In screenshot below, it goes from solids appear to a few solids a couple of alerts later. Screen Shot 2019-09-25 at 3 26 57 PM

terracoda commented 5 years ago

I'm thinking you might want something like this:

Edited Sept 26 to correct the actual example alerts.

Matthew-Moore240 commented 5 years ago

@twant We mainly want to see a "More solute, more solids. Still saturated with a couple of solids." to come right after "Solution saturated. Beyond max concentration solids appear."

terracoda commented 5 years ago

@twant, of course the description of the amount of solids has to be true in the model. I'm not sure if any of the solutions can go from "not saturated" to "saturated with a few solids" in one key press. If that's possible that's fine. We just don't want the range for "a couple of solids" to be skipped.

twant commented 5 years ago

@terracoda @Matthew-phet just pushed an update. It definitely varies quite a bit with the solute chosen, but I do think it's better than before. Let me know what you think!

terracoda commented 5 years ago

@twant, I see "a couple of solids" show up now in both directions. Thanks! I agree that all this is quite tricky as the molar and solids vary so much between different solutions.

@Matthew-phet, please have a look and close if this alerts are good from your perspective.

Matthew-Moore240 commented 5 years ago

Looks good to me! Closing.