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1 vote

Determination of the chloride concentration by the modified Volhardt method

Ok, your formula for calculating the chloride concentration: $$[\ce{Cl^-}] = \sqrt{\frac{K_\text{sp}}{[\ce{Pb^2+}]}}$$ is fine as far as it goes. The equation can give a ballpark estimate of the ...
MaxW's user avatar
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0 votes

Why is the specific gravity of 0.9 % saline 1.0046?

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Ron Fuerst's user avatar
4 votes

Best regression model for a sigmoidal pattern

The generalised logistic function might be a good fit for your data. You will probably have to test the effects of each parameter to determine whether you need them to model your data. At first glance,...
aaueer's user avatar
  • 41
2 votes

Best regression model for a sigmoidal pattern

Use the R drc package which was created to solve your problem exactly: sigmoid regression; its acronym stands for Dose Response Curve. It is a well-established package backed up by scientific ...
Niels Holst's user avatar

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