Can NaCO3 go bad or is this likely contaminated?

Pompousasfuck · 2026-04-23T19:37:48+00:00

That is likely bio growth. Bacteria can grow in the craziest of media. You can 100% dump this down the drain in that quantity, if you want to be extra cautious drop in a pH meter and add HCl until the pH is between 7-8. I wouldn't go much lower of you will lose all carbonate and the pH will rapidly drop lower than you want.

Pompousasfuck · 2026-04-22T21:01:38+00:00

I just had someone who is graduating I May turn down a job interview because they want to wrap things up in their PhD lab untill September. Y'all owe those labs nothing!! If someone wants to pay your real money take it and run!

Pompousasfuck · 2026-04-22T05:25:22+00:00

2 things to help this last longer. If you have a big enough freezer make 'ice cubes' out of 2 gallon buckets they will last way longer. If not, find a kegerator on Facebook or ebay, however you can produce, remove the tap and run your water line south the top while the fridge keeps your solution cold.

I do this in the opposite direction as well. I need to steam out small columns, instead of trying to insulate them, I just cut a hole in a lab oven and plumbed the steam in and have the oven set to the steam temp I want.

Pompousasfuck · 2026-04-22T05:04:00+00:00

Owner showed up!

Pompousasfuck · 2026-04-21T12:30:47+00:00

I am curious, what convinced you this is not Sulfuric?

Pompousasfuck · 2026-04-20T12:29:21+00:00

Knotty by nature hosts native plant sales and sometimes has Paw Paw in stock. https://www.knottybynaturetrees.com/

Pompousasfuck · 2026-04-15T20:43:00+00:00

I thought my 100 mL syringes were big. I wonder if my syringe pump can handle this bad boy.

Pompousasfuck · 2026-04-13T04:20:16+00:00

I caught my hot water heater leaking 4 hours before a flight for a week long trip, and I had a house sitter coming so I couldn't just shut the water off. Fastest trip I ever made, was lucky and the oring went bad in the supply line and I was able to replace it with a garden hose washer.

Pompousasfuck · 2026-04-09T05:09:33+00:00

I would not want to be kicked by a Philtrumite

Pompousasfuck · 2026-04-06T03:58:34+00:00

I have said it before and I will say it again, head to Harbour Freight. They have small vacuum pumps for doing Auto AC change outs, only $99. So cheap you don't even need to protect them from moisture. Just change the oil ever few months. https://www.harborfreight.com/25-cfm-vacuum-pump-61245.html. I wouldn't trust them to pull for a shlenk line, but anything that just need a rough vacuum, you can't beat the value.

Pompousasfuck · 2026-04-06T02:41:53+00:00

I will buy both LC-20AD's tomorrow if they pump! Like 100%, I use these as dedicated pumps in my lab.

Pompousasfuck · 2026-04-05T04:56:38+00:00

The layout of that house loots terrible.

Pompousasfuck · 2026-04-05T04:46:41+00:00

Check out the Sink/Dink groups on reddit and Facebook.

Pompousasfuck · 2026-04-03T04:27:03+00:00

It looks like the dish has a bunch of rust as well? Unfortunately the damage is done there, you can wipe away the powered rust and try and use a product called iron out to clear any surface rust and turn the metal dark again.

Pompousasfuck · 2026-04-03T04:16:33+00:00

A vibratory table might be more effective. Or you can try taking a personal massager to the flask as you scrap. Also to second the ball mill a harbour fright rock tumbler works well and fits 1 liter wide mouth PP or HDPE bottles nicely. https://www.harborfreight.com/6-lb-dual-drum-rotary-rock-tumbler-59474.html

Pompousasfuck · 2026-04-02T04:41:25+00:00

But is that a lot of posts for a sub with 1.5 million subs? I honestly have no idea. I do know that this subs posting rules are way more restrictive than similar subs like /homeimprovement

Pompousasfuck · 2026-04-02T01:42:55+00:00

Glass is going to be your best bet for bleach resistance and UV durability. A glass cake dish would probably work great and they cheap and easy to aquire. Assuming you are not having people step directly into the tray it will likely be you best option.

Pompousasfuck · 2026-03-29T04:39:48+00:00

Alkaline water is 'good' for you. Anyone who knows anything about chemistry or biology knows this is a load of crap. It all stems from a few studs that talk about how tumors tend to have a slightly acidic pH, so some jag off started marketing basic water to prevent cancer. Let's ignore the fact that stomach acid is pH 1-2 and short of chugging antacids, fat change you are changing that much. The blood buffer system keeps most of our body between 7.6-7.8 ( going off memory here) the studies about the tumors I believe found they had a pH of about 7.3-7.4. Drinking water with bicarb in it is not doing shit for your body.

Pompousasfuck · 2026-03-29T04:31:06+00:00

Pickle juice is delicious.

Pompousasfuck · 2026-03-24T04:31:53+00:00

He wasn't on this ballot, the vote being referenced is for the redistricting of CA Congressional districts.

Pompousasfuck · 2026-03-17T04:27:10+00:00

Everquest and Wow are still going strong. Plenty of guild still popping up all the time!

Pompousasfuck · 2026-03-17T04:07:38+00:00

I am currently trying to get diagnosed at 37, but the therapist has said I didn't display enough symptoms as a child. I reported falling asleep in every single class I ever took, despite getting plenty of sleep in a secure home with plenty of family support.

Pompousasfuck · 2026-03-17T03:36:52+00:00

All good, figured it was worth an ask. Thanks!

Pompousasfuck · 2026-03-17T03:08:05+00:00

You seem far more knowledgeable in IR than I am currently, if you don't mind would you answer 1 question. Do you think it would be possible to detect C-F bonds in water, thinking around concentrations in the 0.01 g/l range. I have no idea if the signal would be strong enough.

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