December 25, 2023

Redox Reaction: Holiday ChemisTree! Copper + Silver Nitrate (Holiday Chemistry)

I swear that it it total serendipity that I'm posting this on Christmas.

I schedule posts way in advance (10/1/23 is when I'm posting this one) and don't pay any attention as to when they get posted. I just line things up so they're on the next available Monday. 

We couldn't get any better a time to see the redox reaction between a silver nitrate solution and a copper Chemistree, could we?

December 18, 2023

pH Tweet

 


See, it's funny because a pH 10 solution would be basic.

The joke subverts your expectations. You see the, "[y]ou're a 10..." and think it's going to be a compliment, that the 10 is on a scale of 0-10.

But, no...they've put the 10 on a logarithmic pH scale where 10 means that the solution contains 1 x 10-10 moles of H+ ions per liter of solution.

Hah, take that!

You've been served!

December 11, 2023

WaterLight - The clean energy revolution is here

I'm skeptical, I will admit it.

I want this light to work; I really do. But I also have to apply the Sagan standard to the light, and none of these videos or articles seem to provide that extraordinary evidence to me.

I keep coming back to the fact that the whole thing just sounds like a nicely engineered magnesium/copper cell with salt water (or urine) as the electrolytic path between the electrodes.

The magnesium electrode is going to run out. That's what anodes do.

Read more, please, and explain to me how I'm wrong. Sadly I haven't been able to find an actual schematic of the WaterLight anywhere.

December 4, 2023

Removing tarnish from silver

Usually when I turn to Compound Interest, I'm looking to find a gorgeous infographic explaining some aspect of chemistry. Today's post from them (him, really), isn't graphical in the least. Instead, it's an in-depth exploration of one of the NACE labs that we perform in our summer, teacher camps: Quicksilver.

Why does the sodium bicarbonate need to be there? Andy explains.

Why do we need the salt? Andy explains.

Where does the rotten egg smell come from? Andy explains.

Why do people still buy polishing plates for as much as $30? Even Andy can't explain that.

Compound Interest is a British blog through which Andy Brunning, a chemistry teacher with a flair for graphic design, posts outstanding chemistry-themed infographics.