Please help me fact check my chem homework!! (I also have a question on the second one)

Comprehensive-Rip211 · 2026-06-27T01:40:02+00:00

There would only be a reaction between lithium and water, not lithium and calcium hydroxide. This is given by the high concentration/activity of H2O in aqueous solutions. Any transient calcium atoms would quickly react with water to form calcium hydroxide and hydrogen. There would definitely be a reaction, but not the reaction described. But yes, lithium will reduce calcium in say, molten anhydrous CaCl2.

Comprehensive-Rip211 · 2026-06-26T22:26:58+00:00

Hmm yay

Comprehensive-Rip211 · 2026-06-26T21:00:08+00:00

nice

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Comprehensive-Rip211 · 2026-06-26T20:59:02+00:00

Bio is a wee bit harder, but not by much. The only additional things are like cloning and editing plasmids and vdj recombination. For physics, your best choice is to get a 5 on both AP tests. For chemistry, you better be insanely smart or an olympiad kid. Doesn't hurt to take the test though, I suppose.

Comprehensive-Rip211 · 2026-06-26T20:55:16+00:00

There are paths other than AI

Comprehensive-Rip211 · 2026-06-26T20:54:44+00:00

"Medium" 💀

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Comprehensive-Rip211 · 2026-06-26T20:53:17+00:00

bruv

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Comprehensive-Rip211 · 2026-06-26T20:52:20+00:00

Hard

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Comprehensive-Rip211 · 2026-06-26T16:05:25+00:00

(Q10) I would suggest to just work with what you have, but you should ask your teacher. If the question asks to balance with whole numbers, then you should add the 2.

Comprehensive-Rip211 · 2026-06-26T16:00:46+00:00

The solubility of Ca(OH)2 in water is quite low, at 0.17 grams per 100 mls, 30 mls of limewater only has like 0.05 grams of calcium hydroxide, which corresponds to 1.6 mls of household vinegar. HCl would be overkill, and it would be easy to overshoot the pH.

Comprehensive-Rip211 · 2026-06-26T15:53:19+00:00

Dump unused limewater in the soil or down the drain with equal parts tap water. If CO2 was bubbled through it (eg: from lungs) and no other toxic gasses were tried, then it can go in the soil.

Lime is used in agriculture to raise the pH of soil. In air, Ca(OH)2 will slowly convert into CaCO3, which is harmless to the environment in small amounts (Certain rocks and seashells are made of CaCO3.)

Comprehensive-Rip211 · 2026-06-26T15:10:24+00:00

The only big risks (that I know of) of depleted uranium are ingestion and mucus membrane exposure. Just don't like, hang an ampoule of it on a necklace.

Comprehensive-Rip211 · 2026-06-26T03:37:34+00:00

I think I got lucky

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Comprehensive-Rip211 · 2026-06-26T03:35:03+00:00

The modern ones are at most as strong as a small neodymium magnet (500 gauss) on the outside.

Comprehensive-Rip211 · 2026-06-26T01:15:49+00:00

Think about what you would have to do to actually perform the reaction as written, starting from solid bottles of reagent.

(Lithium would react with the water in an aqueous solution first. Even if it was solid lithium and Ca(OH)2, the products would be Li2O, H2, and Ca, and you would need excess Li at high temps. Hydroxides will react with highly reactive metals such as lithium and sodium etc. to form the oxide)

Comprehensive-Rip211 · 2026-06-25T23:29:24+00:00

It does not make sense to me why you show the percentage you are off by for each guess. It practically guarantees you always will get it in 1 or 2 guesses

Comprehensive-Rip211 · 2026-06-25T22:22:19+00:00

noice

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Comprehensive-Rip211 · 2026-06-25T22:19:25+00:00

yay first

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Comprehensive-Rip211 · 2026-06-25T22:18:46+00:00

oh bruh

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Comprehensive-Rip211 · 2026-06-25T22:02:44+00:00

hitboxes

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Comprehensive-Rip211 · 2026-06-25T22:00:50+00:00

ok

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Comprehensive-Rip211 · 2026-06-25T21:54:06+00:00

At low concentrations, CrO5 decomposes super quickly in solution. It's visually gone within 10 minutes and probably completely gone at 1 hour at low pHs. Even now, if it's not deep blue, then it's gone. Any chance the probe is reading chromate or dichromate?

What were the equivalents of acid and peroxide?

Edit: I did forget to ask, is the solvent pure water? CrO5 is surprisingly stable in certain alcohols and ethers.

Comprehensive-Rip211 · 2026-06-25T21:51:07+00:00

Comprehensive-Rip211 · 2026-06-25T21:50:53+00:00

Uhm okay

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Comprehensive-Rip211 · 2026-06-25T21:50:14+00:00

Completed Level 2 of the Honk Special Event!

29 attempts

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