pippo

Could you remember the location of 200+ small objects you buried four months after the fact?

No, cuz we are preoccupied to do stuff every day like rise when the alarm clock rings, brush your teeth, thgen floss, dress up with a tie, and remember how to tie it, kisss the wife goodbye or shell get mad, select the right car key on your key ring, start the car with the appropriate sequence to start a car, back up without crashing, drive in heavy LA trafic without speeding, whilst you constantly monitor the speedometer, and thats only the first 1/2 hour of the day!! LOL.

If al I had to do was chase invader squirrels from my tree branch, and scratch off the occasional flea , the priority for me would be remembering the 200 acorns to eat- NO problem!

People,

A friend asked me (and Im asking yous) the above- hes smelling an awful smell in his shower, and its making him cough like mad. The utility Co here uses chloramines not chlorine. Is here any possible way one can smell chlorine or the other component, ammonia from this basic molecule (meaning the molecule would have to be broken down, I figure)?

Thanks

LOL!! Funny posts- nothing wrong with injecting a little humor in this subject, I say! Good points, fellow members. Geez- I shoulda remembered animals are mostly water (Bio 101, I even got an A in it). I get it now. 100g of tuna in a can, get the consumer only a fraction of true protein, when weighed up.

Thanks, people, for the continued advice/help!!!!! Keeps me coming back! (time to eat "crow", instead of tune, with the wife- she was right.....sheesh)

I mean, lets assume theres no fat/oils/starches in the can. Isnt a 6 oz can of tuna 6 ozs of "protein, for practical considerations? Some doctor here is telling the wife its not true- that all shes getting is a fraction of that in "real" protein........

You are aiming to make sodium salicylate.

Off hand, I'm not sure what pH a solution of that should be.

But, if I had some sodium salicylate I could dissolve it in water and measure the pH.

Then I could aim for that pH when I mixed the solutions.

 

Alternatively I could calculate that 138.12 grammes of the acid react with 39.9971 grammes of the hydroxide.

Call it 3.5 to 1

sory for late reply, John, but thanks for the calculations, and info! pH happens to be about 6.4- checked it with some scraps of S Sal I had around. Im gonna save lots of $ by reacting it myself, as S Sal has jumped in price the last yr. Big thanks for your support!

Also, thanks to Edgy.

I'd make solutions of the two materials then mix them but, essentially, yes.

Yes, good tip on making into solutions first, but are you sure this will convert the acid part to the Na salt? Then, just need to know at what ph to "react" it to, right, John? Guess, I could look up if its stated anywhere, otherwise, heck, I will just shoot for pH 7......

People,

Is this too easy- if I take salicylic acid powder, then add NaOH to make sodium salicylate? The stuff has shot up in price and if I can react this this way, would be way cheaper.

Thanks!

Big thanks, Char and John. That link was useful. (Char, that mettler is from the 1950's. Mechanical. No "cal" mode on those) Balance still works. Its a real piece. Like a swiss watch.

People,

I have Class S NIST weights, but I dont understand what is meant by "tolerance" when calibrating a Mettler. Say, I grab a 100g weight, zero the scale, place it on the pan, and get a weight - say 99.9965g. That is pretty good to me, but when a manual says "calibrate to NIST tolerance for class s ", what do they mean? Sjhouldnt that imply a min /max tolerance? Where then do you find this tolerance?

Thanks

Cosmetic/pharma products may not necessarily be harmful, but most are at least USELESS. Also, way oversold. What could one expect in this consumer society.

As far as I can tell from the wiki article, there was a scare when some cosmetic product was (presumably inadvertently contaminated with Cr and Nd which are potentially harmful as they can cause allergic reactions.

 

OK, someone somwhere crewed up, but that's not a reason to take the product off the market. At best it's a reason to bring in better quality control.

If the Cr is the hexavalent form, it IS harmful.

In order to offer Fresh the opportunity of a class-action.

But for that, he needs some credible story and can't find it by himself.

Maybe I can help, then. What if the cosmetic companies that peddle in the women's care market skin exfolients that contain plastic? Yes, plastic. Goes down the drain, and causes plastics pollution. Not decomposable, gets into the ocean, and consumed by plankton, consumed by sardines, then we eat sardines. Hey, worse things happen, but thats pollution, people. Just depends on how much pollution. A good lawyer will show how much.

sorry for late reply, people, but yeah, turned out MOST of the NaOH was still "there". I titrated BOTH the carbonate and the hydroxide, and the carbonate was minimal. Looks like most of the NaOH was "preserved". Big Thanks for the help.

People,

Need help badly- have a 15% w/v aqueous solution of polyvinyl alcohol. Upon the usual addition of a bactericide benzalkonium chloride (100mls/42L) it cross linked (turned very cloudy). Now, it appears homogeneously cloudy, unless its just in suspension. The solution is sooooo viscous too.

Might have to dump it unless I can filter it out, but my limited knowledge of organic says it might not be able to be.

Advice apprciated.

Oh- I assume the cross linking is because the preservative- benzalkonium chloride may be old, but not sure if that stuff even has an expiration date......Ive used it for many years - the same lot with no problems. Now, BOOM- cross linking (apparently)

Hmmmmm, every time I dissolve iron granules in HNO3, I use conc nitric first, let it sizzle, then when it slows down, I add some heat, then it sizles more. let it sit overnight . Then, I have just a few granules left- I decant, then add just a tad more of conc nitric. Looks great every time. Brown/amber, clear solution.

People, (oops, I meant to add a "2" after the Na in title)

Say one has a 50lb bag of sodium hydroxide pellets, saved for 5 years. Then, say it turns into a solid rock. Then , say one smashed the rock into bits and dissolved the whole mass. In your opinions, how much of the NaOH would have absorbed carbonates from the atmosphere ? When that happens, is it part of the NaOH converting to carbonates, or is it the NaOH is still there and just that the carbonates are adhering/adsorbing onto the NaOH pellet's surface?

Thanks!

Oh- if it "converts", is it likely that the entire NaOH can convert over to be fully Na2CO3?

The brain requires the correct balance of water to minerals, and it will maintain this ratio (robbing water from other parts of the body) for quite a while even if the rest of the body is dehydrated. You would have plenty of symptoms to warn you that you're dehydrated long before brain dehydration could occur. You'd get dry mouth and eye sockets well before you'd get seizures and brain damage.

 

On the other hand, you do feel lethargic when dehydrated. How much of that is due to the brain telling the body to stop exerting itself to conserve water is up for debate, I guess. At what point can it be said to be affecting your brain to remain stationary as opposed to going out to search for some water?

Thanks, Phil. Good to know./learn. So, sound like the brain would be the LAST organ to be affected making it the "top dog" organ, right? Whew- thats good news to me. I heard of people saying if youre a little thirsty, watch out- youre gonna get alzheimers quicker than otherwise. Better drink 8 quarts of H2O per day!! Stop drinking coffee!

Man, Im so glad you guys are here to clarify.

We have such a warning system.

It's called getting thirsty.

Big thanks, John. My hunch was correct.

People,

I know dehydration, at different severity levels, affects the body (heart rate, sweating decrease, cramps/spasms, etc), but heard a "theory" that even a slight thirst, one which the body's biochemistry may not even make you aware of, can rob the brain of water content, decreasing the memory ability.

Does that make sense? (oops, while writing this I was not drinking , better drink water now.....)

Thanks, People.

I should add, if the ebove is true, why does our body then, not warn the brain to drink at the critical moisture loss "level"?

be careful- HF is very dangerous.....

thanks, people. yes, I have heard of the ATF + acetone, 50/50. Also heard of old/used motor oil.

oh- I no like new website. I resist change- old chemist. but, things happen.

Good point, on the large difference requiring just a few bolts, swan. Overwhelms the tiny differences between them.

Thanks, swan. Makes common sense. Well, common to scientific approach, of course, which is what I strive to adhere to. Sample should be as large as possible to arrive closer to a top of bell curve distribution(?), I figure.

People,

Can one create/prepare UNIFORMLY rusty bolts siezed into a steel block for an experiment where all the bolts rusted in will be exactly of the same degree of rust? In other words, say one wanted to test different rust penetrating fluids, and apply different fluids on the bolts as "control " bolts, assuming that in the experiment you would have exactly the same conditions for an unbiased test.

I guess there is so many factors that could alter one bolt from another rusty bolt. I mean, the threads themselves, so much can change inside threads affecting "rust" development.......

Thanks!

No, John, cant add contaminants. Thanks for the reassurance, element. I was pretty confident about this. (if your curios about why I posted, its a common issue with ethanol added gasoline mixtures. Commmon misconception is the ethanol separates from water, but actually, the water/ETOH blend separates from the GASOLINE portion. )

I mean, I have never seen water and ethanol separate from an aqueous solution, at room temp, at different concentrations of the ETOH. I thought polarity was the predominant determining factor here. Like likes like. Can a solution of ETOH/H2O separate by "phase separation"? Or is this pseudo science, people?

Thanks

If your copper chloride is soluble (either in H2O or dil acid), you can use it sparingly, though, on tree roots you might have that are nuisance (old drain pipes that are cracked, allowing roots to migrate in/grow into, etc). Home Depot sells Cu SO4 for same purpose, so your copper should do the same effect on tree roots, I think. Maybe a forester /botanist could verify this.

The actual fermentation pathway to ethanol using sugars as starting material does not yield methanol. So there is no equilibrium reaction between those two constituents.

However, during fermentation of beverages the starting material is more complicated (e.g. grapes for wine). Methanol can then be released during the breakdown mostly from pectin, I think. During pectin degradation a methyl residue is removed from a methylesterified galacturonosyl yielding methanol and a homogalacturonan, I think.

So again, it is mostly decoupled from the ethanol fermentation pathway.

 

However, many plants (especially the fruit) for fermentation are not terribly high in pectin and for wine I found concentrations between 0.1-0.2 g/L (or 0.01-0.02 % w/v).

Big thanks, charion. I suspected that methanol equilibreum was malarchy (to borrow from Biden's debate last night....LOL). Just for the record, how did the back woods brewers in the mountains get methanol contamination in their booze?