# Tag Info

## Hot answers tagged concentration

Accepted

### What happens to an ongoing electrolysis when you turn off the battery?

This is a very good question! I'm not sure why you received a downvote. What you are asking about is called a polarization current. Suppose we are electrolyzing a solution and suddenly we stop the ...
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### Best regression model for a sigmoidal pattern

It looks like your model is not complete. The current shape of your model makes the function go to zero for small values of $x$. There is nothing to indicate that the function should go to zero, ...

### Best regression model for a sigmoidal pattern

Some of the examples on the page EdV's comment points to are programmatic (as in: knowledge of a scripting/programming language is beneficial/a requirement) in addition to statistics. If you are more ...
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### Best regression model for a sigmoidal pattern

I am answering to the comment that you made to the @Buttonwood's great answer. Clearly the $y$ values are the $\text{pH}$ of the solution and the $x$ values the volume of base added. If you don't mind,...
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1 vote

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1 vote

### How would I find the molarity/concentration of a gas using pV = nRT?

I'm only reviving this old question because I got significantly different results compared to the proposed answer. Let: A = $\ce{SO3}$ C = $\ce{SO2}$ D = $\ce{O2}$ The change in moles for this ...
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1 vote

### Molar Absorptivity of Copper(II) Sulfate

TL;DR: the values that you may find online will most likely only be accurate up to a few percents. I would strongly encourage the use of a reference solution of known concentration that you can ...
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1 vote

### Are all salts completely dissociated in solution when put in smaller amounts than their molar solubility?

We should not expect salts with multiply charged ions to be completely dissociated in aqueous solution except, perhaps, at very low concentrations. The comments refer to magnesium sulfate, a technical ...
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1 vote
Accepted

### Scrubbing methanol and ethanol from a gaseous mixture

Try a trap filled with a high boiling point liquid, such as glycerol or propylene glycol, which would absorb the organic gases... but would require periodic replacement or heating to drive off vapors. ...
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