BRYAN SMITH

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Recent Posts by BRYAN

Tue Sep 12, 2017 10:10 AM in Elephant Toothpaste
Jesus, I find much less expensive 30% H2O2 at a local store that sells water purification systems. The concentration is key since the reaction is exothermic enough to auto-accelerate. Be sure you test it with small amounts first, because those higher concentrations of H2O2 present additional hazards. Best, Bryan=

Tue Mar 21, 2017 5:54 PM in Planet Protection Chemistry Labs?
Kyle, would you be interested in measuring the CO2 concentration in the air? I’ve worked up a gravimetric method that traps the CO2 in diluted sodium hydroxide, then precipitate with barium chloride. In addition to the chemicals, the only at all unusual equipment is a small air pump (like you’d find in a small fish tank) per group. Rolling this lab into a conversation/seminar on global energy s...

Sun May 31, 2015 1:35 AM in What Was Dalton's Model?
Eric, It makes sense that Dalton's model wouldn't necessarily have a mechanism for bonding. It was quite a leap to infer the existence of atoms and their associated molecular compounds from his experimental results. As for how or why those compounds formed in whole number ratios of atoms, well, I wouldn't be too hard on Dalton for leaving that nut for someone else to crack. What I'm loo...