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DIY Positive Displacement

Could anyone offer a suggestion as to how an economy-minded chemist ought to implement a DIY-ed positive displacement alternative to the following:
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1answer
83 views

What's the weight of 1 liter of x% HCI? [closed]

Given an x% dilution of Hydrochloric acid in water with volume 1 liter, what would it's weight be? I'm trying to work out a formula in terms of x.
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1answer
132 views

Test presence of oxygen > 1%

I want to qualitatively test for presence of oxygen within argon gas. I would like the test to be positive if approx 1% or more is oxygen, but definitely negative if less than 0.1%. Anywhere between ...
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1answer
131 views

How can one optimise the formation of copper acetate?

Mixing solid copper, 5% vinegar, and hydrogen peroxide ($\ce{H2O2}$) causes copper acetate to form. The process will occur very slowly without hydrogen peroxide. Adding $\ce{H2O2}$ speeds the ...
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979 views

Why are strong acids and bases not suitable as primary standards?

This is one of the questions with which I have puzzled over, and can arrive at no definite conclusion. Why are strong acids or bases, such as $\ce{H2SO4}$,$\ce{ HNO3}$, $\ce{HCl}$, and $\ce{NaOH}$ not ...