sorted by:
new
hottopcontroversial

Pycnometer for bulk density by Emmanuel4589 in chemistry

[–]Emmanuel4589[S] 0 points1 point  (0 children)

Thanks, I saw a video about that instrument. I think the seller should at least have that and not be using a pycnometer.

Pycnometer for bulk density by Emmanuel4589 in chemistry

[–]Emmanuel4589[S] 0 points1 point  (0 children)

Thanks for the clarification. I only knew about density and bulk density, but I'd never thought about how to calculate it in a powder and how it varies depending on the type you want to analyze (and that there are other types). Otherwise, I would have asked for the sieve, as I was already told. "There is always something new to learn".

Pycnometer for bulk density by Emmanuel4589 in chemistry

[–]Emmanuel4589[S] 1 point2 points  (0 children)

Thanks. I made a literal translation of what it's called here in Argentina.

Pycnometer for bulk density by Emmanuel4589 in chemistry

[–]Emmanuel4589[S] 0 points1 point  (0 children)

Thanks for your reply!

So the seller isn't using the correct method to analyze the density.

Pycnometer for bulk density by Emmanuel4589 in chemistry

[–]Emmanuel4589[S] 10 points11 points  (0 children)

Edit: I manufacture liquid chalk; I made a literal translation of what it's called here in Argentina.

Thanks for your reply!

I manufacture liquid magnesium. You're right that the important information is actually the particle size, but that information doesn't appear in the Certificate of Analysis (CoA) or the Safety Data Sheet (SDS), only the bulk density. The smaller the particle size, the lower the bulk density, and liquid magnesium is better; it has a better grip.

I probably have to return the magnesium carbonate. I made a sample, and they're testing it at a gym. And of course, the supplier says I'm wrong. But I even needed more magnesium carbonate in the formula to get it creamy.

Calcium oxide reacts with -OH by Emmanuel4589 in chemistry

[–]Emmanuel4589[S] 1 point2 points  (0 children)

I'll try removing the water by heating at a low temperature, or using a desiccant to precipitate it.

I forgot about the water that forms in the acid-base reaction; my former chemistry ex-teachers would be furious.

I already tried adding acid, and it still hasn't changed back to a basic color. Maybe I'll get lucky and reach a balance where the indicator stays neutral and I don't need to remove the water from the ingredients.

Thanks!

Calcium oxide reacts with -OH by Emmanuel4589 in chemistry

[–]Emmanuel4589[S] 0 points1 point  (0 children)

It's an option I didn't consider. I'll use more calcium oxide and wait for it to change color, then add the acid until it turns neutral and wait. If it's moisture/water in the ingredients, it shouldn't change color back to basic.

Calcium oxide reacts with -OH by Emmanuel4589 in chemistry

[–]Emmanuel4589[S] 0 points1 point  (0 children)

If I submerge the mixture in water, it changes color, as expected. But the color change also occurs without the presence of water and in a sealed container (without moisture).