Water Quality B/C

[personasaurus rex]

Doesn't CaCO3 not even dissolve at room temperature? How could they make a solution out of a nonsoluble salt?

[sazhassan]

yeah. It's in the Water Quality Wiki though...

No, that's Wastewater treatment. There is a fine line between the two.

oh never mind... i have potable water treatment in my notes... i think it was soinc.org then. srry.

[PacificGoldenPlover]

Good point.
Maybe silentsage meant SODIUM carbonate, which does dissolve.

[2win]

So it IS possible for them to use something other than NaCl? But would that mean that calibration would have to be different for each salt or no.. Am I like, overthinking this...

[sazhassan]

So it IS possible for them to use something other than NaCl? But would that mean that calibration would have to be different for each salt or no.. Am I like, overthinking this...

you may be.... since our state only gave us multiple choice... which was really weird... there was no salinometer or anything else...

[lolliexdd]

I hope this hasn't been answered yet..

We've been having problems building a salinometer like the one they recommended we make, with a straw and clay. Every day that we test any of our salinometers (we've used 3 types of clay already) in tap water, they all float to a different line than the day before. We've even used deionized water instead of tap water to calibrate it, but we still have the same problem. Do any of you know how to fix this?

[2win]

I hope this hasn't been answered yet..

We've been having problems building a salinometer like the one they recommended we make, with a straw and clay. Every day that we test any of our salinometers (we've used 3 types of clay already) in tap water, they all float to a different line than the day before. We've even used deionized water instead of tap water to calibrate it, but we still have the same problem. Do any of you know how to fix this?

Try distilled instead of deionized water...

[lolliexdd]

Try distilled instead of deionized water...

Aren't they the same?

[ptkid]

I hope this hasn't been answered yet..

We've been having problems building a salinometer like the one they recommended we make, with a straw and clay. Every day that we test any of our salinometers (we've used 3 types of clay already) in tap water, they all float to a different line than the day before. We've even used deionized water instead of tap water to calibrate it, but we still have the same problem. Do any of you know how to fix this?

Okay, so when I tried making that one it just doesn't work. The soinc.org people are just wrong. A simple straw and clay model cannot be that accurate and can easily break. You need to think more sophisticated like how you can make it more accurate. Experiment to get a good salinometer.


And they basically are the same (deionized and distilled water).

[2win]

Try distilled instead of deionized water...

Aren't they the same?

My understanding is that deionized water may still have some dissolved gases and such in it.... distilled water is pure water with no gasses or other particles/substances.

But yeah, the soinc one is pretty crappy. A team at my regionals made one last minute because they left theirs at home, and so... Yeahh, they didn't really get a good reading...