Ben Meacham

Chemistry teacher in Prior Lake, MN. Contributor for ChemEdX. Interested in anything that helps better my profession and develop science literacy in my students

[Ben Meacham @Meachteach]

@KatyDornbos I like this as a potential way to minimize those who tend to rely a bit too much on answer keys I post. Checking their understanding at a few points should reassure those doing things right and remediate those who need it before continuous errors are made.

[Ben Meacham @Meachteach]

@KatyDornbos Could be as simple as “For every 4 mol of Fe, 3 mol of O2 will react. Therefore, if 1.43 mol of Fe react, 1.07 mol of O2 will react since 4/3 = 1.43/1.07”
This use of proportional reasoning is where I see lots of kids slip up until they finally “get it”

[Ben Meacham @Meachteach]

@KatyDornbos I’d consider another box where -1.07 mol is and ask…
-why does 1.07 mol have a minus (-) sign but box c doesn’t?
-using proportions, justify why -1.07 mol is the correct value for that cell. **something that gets them to recall the role that the stoichiometric ratios play.

[Ben Meacham @Meachteach]

@KatyDornbos That last part is where my mind went right away and that’s what I thought original intent was. But you’re totally right about the value of simply writing a statement about what each box means. I’m def going to try this out later on. Thx!

[Ben Meacham @Meachteach]

@KatyDornbos Not sure how true this is, but I had heard this was for evolutionary purposes. If the child looks more like dad (initially), I’m more likely to stay and contribute to raising the child, which benefits both mother/child.

[Ben Meacham @Meachteach]

Access to @VernierST melting station is going to help with our properties lab this year. Usually just have kids record melting order on hot plate which can often get messy and wasteful.

[Ben Meacham @Meachteach]

@RyTriGuy @aserkin @ChemixLab Their selection is crazy now! I’m surprised by how often I use the little things like the bubbles just for that seemingly unnecessary detail

[Ben Meacham @Meachteach]

@claremclellan One period (about 55 mins) to collect data and do calculations. Next day used for analysis and writing CER

[Ben Meacham @Meachteach]

Which salt would be best for an effective and economical cold pack? Fun lab to do and student CER whiteboards.

[Ben Meacham @Meachteach]

@DrDSteele_PhD Go right ahead!

[Ben Meacham @Meachteach]

@ashley_green2 Lab doc and overview of CER for whiteboards

https://t.co/wulsmLaZwX

https://t.co/DYUm4WWyEK

[Ben Meacham @Meachteach]

@dragan39 Lab doc and overview of CER for whiteboards
https://t.co/8xRSKNFZq3

https://t.co/NHf4vVnFaB

[Ben Meacham @Meachteach]

A slightly difrn’t approach to help students visualize limiting reactant. Before discussing the concept, we generated these balloons (vinegar + baking soda). The fact that several were same size created a perfect opportunity to dive into what was happening. #chemchat

[Ben Meacham @Meachteach]

@MrHambley Here’s what I’m giving students. Tried coming up with some random products and it got a bit tricky at times due to balancing so I settled on these.

[Ben Meacham @Meachteach]

@MrHambley @KatyDornbos Link to copper (II) carbonate hydroxide from Flinn if interested: https://t.co/5ZKmGnafGw

[Ben Meacham @Meachteach]

@KatyDornbos Soooo would Fluorine have the most “rizz”? 🤔

[Ben Meacham @Meachteach]

@mrfarabaugh 💯 thank you!