Saturday, 18 January 2014

By on January 18th, 2014 in Barbara, science kits

10:25 – Barbara just finished spreading the mulch. It was 25F (-4C) out there not counting the wind chill, which is significant. I’m doing laundry and filling bottles.

Oh, yeah, and making up chemicals. I didn’t get around to making up more Kastle-Meyer reagent yesterday, and of course an order for a forensic kit arrived this morning. I had to tell the customer we were out of stock on KM reagent and that because of the national holiday Monday his kit wouldn’t ship until Tuesday. I already have the new batch of KM reagent in process. It’s a lot fun to make. Nothing like refluxing a 40% solution of potassium hydroxide and watching the 2-liter flask dissolving in the solution as it refluxes.


2 Comments and discussion on "Saturday, 18 January 2014"

  1. Lynn McGuire says:

    watching the 2-liter flask dissolving in the solution as it refluxes

    Is the flask glass? Big sucker to dissolve. What is the ph of 40% KOH? I would think around 11 or so.

  2. Robert Bruce Thompson says:

    Oh, yeah. It’s a borosilicate Erlenmeyer. Off the top of my head, I’d guess the pH of 40% KOH is 15, give or take a few tenths.

Comments are closed.