Concentration and Ksp calculation

Annonn

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Posts: 213

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2 years ago

I can do the mean, SD, and RSD alone.
I'm just confused on where to start (step-wise) on calculating the concentrations of the OH-, Ca2+, and Ksp of Ca(OH)2 (calcium hydroxide).

These are the instructions from my assignment:

1. Calculate the concentration of the OH- ion from your data.

2. Calculate the concentration of the Ca2+ ion from your data. (You can calculate the concentration of your Ca2+ from your [OH-].)

3. Calculate the Ksp for calcium hydroxide. (Just another equilibrium constant from the chemical equation. Remember that a solid will not end up in the constant equation.)

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bio_man

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Educator

2 years ago

I found a lab report for you again. Please review it to see if it helps.

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lab_report_11.pdf (47.23 KB)

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Annonn Author

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2 years ago

Thank you once again!!

So, I am currently trying to follow the steps that the individual took to calculate for the OH- but I am a bit stuck on where they got .015 L (I highlighted it):

I'm trying to reference their steps in order to solve my own data, so hopefully you see where I am confused Smiling Face with Open Mouth and Cold Sweat

Smiling Face with Open Mouth and Cold Sweat

The rest makes sense to me though!

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bio_man

wrote...

Educator

2 years ago

See the second sentence of the procedure. The person says "gather 15 mL of calcium hydroxide"

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Annonn Author

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2 years ago

Ah, I see, thank you! That makes it so much clearer! Slight Smile

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bio_man

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