chenbeier

Mistyping

Graphite has electrical conductivity, but has no positive or negative charges . This you need to exchange ions: cathion plus or anion minus. Graphite has adsorbtions capabilitis. You can remove a lot of impurities. Used in water Filters.

A Part of a modified Soxhelt extractor probably.

Additionally a dilution will give every time the same unit. If Stock is mass/ volume the the dilution will also mass/ volume Example 1g/l diluted by 10 give 0,1 g/l If you have volume by volume then its again volume by volume. Example 1 ml/l dilute by 2 gives 0,5ml/l

No, because hardness is given by the amount of Calcium. Acid will not change it. You need a softener device. Its an ion exchanger which exchange Ca to Na. Or reversed osmosis. You could also add sodiumsulfate or phosphate and filter the water from the precipitate.

1. There will be compounds formed. Cu 2+ is already a salt. It has an anion. Zinc will form a salt if its transformed to Zn2+. Th process goes under humidity. Its also called a galvanic element. It guides to corrosion. In your case zinc corrodes. 2. The first what you described is an simple batterie. Daniel element. Water itself has pure conductivity. For electrolysis a salt or sulfuric acid will be added. On cathode. Hydrogen will be develped. 2 H+ + 2 e- => H2 On Anode oxygen will be developed. 2 H2O + 2 SO4 2- => 2 H2SO4 + O2 + 4 e- Under aid of sulfuric acid water will be electrolysis. 2 H2O => 2H2 + O2

This is basic mathematics .Percentage calculation. But the question is 5% w/w or v/v or v/w. The easist would be if it is w/ w weight by weight. 100 g would be 5g lipoic acid and 95 g propanediol. If you want to do the others need specific gravity to convert to volume. 100 ml would be 5 ml lipoic acid and filled up to 100 ml with the solvent. The last would be 5 g dissolved to 100 ml. Solution. All 3 are different. By the way give no receipes for pharmaceutical drugs.

Adding coal (carbon) is the normal way.

This is still to less information. Describe the problem more in detail. What kind of equipment, how is it working and what is not working

Ammoniumchloride decompose under heat and smoke containing HCl and NH3 will be developed. In a closed oven you will find ammoniumchloride at the walls and window of it. Maybe you describe your craft work.

We should not give advices, what a job of a doctor or physician is. Chlorine dioxide is poisson and has etching power. And covid cannot be cured with it. It the same if you drink paint stripper. See warnings here https://en.m.wikipedia.org/wiki/Miracle_Mineral_Supplement

I dont know what the teacher want to see. 1,5 mikro l is ok. But 0.003 g should be 3 mg

The topic was discussed here: https://chemicalforum.webqc.org/viewtopic.php?f=10&t=20353 In the attachment it must be a mistake. All others are correct.

Probably.

This is the "von Braun reaction". But this substitutes one alkyl to nitril. How do you know that methyl and not the R will be substitutet. The nitril has to be treated further. Nitril to Carbamidacid

You will not get a clean product. You will have a mixture of half and full nitril substitution.

Draw the mesomeric structures. Acetic acid can dissociate to Acetate, what is also in the list.

First the bond is not broken. H2 will be adsorbed on platinum. The same alkene does. There will interaction and hydrogen will bond to alkene. On the surface Pt-H and Pt- C bonds will built and in further reaction new C-H bonds will developed and the meralbond will be broken again.

It is one option. But why not use BrCl.

In English its silver hydrogen dithionite. In German Silberhydrogendithionit.

ide is only used for single anions, like flouride F-, chloride Cl-, etc. ite and ate is used for more larger anions like sulfite SO3 2-, nitrate NO3 - etc.

You can do, but the (I) is not necessary, because silver normaly is Ag+. But I don't think this is existing. Dithionite is a strong reducer and would reduce silver immediately.

GASOLINE contain hydrocarbons. These are able to work as a sweller. The fuel compounds petrate the molecules of the plastic and expand them. In some cases it can dissolve them. Alcohol would be the better choice. Because it solouble in water. Or any commonhoushold cleaner based on water.

Yes thats right. But with the additional CH2 need different way or extend the chain.

Oh yes I missed one CH2.