WhiteMeth

[primitiveintelectual]

4,8 g PseudoE
2,5 g RP
6g I2
1,5ml H3PO4

oljna kopel
4 ure refluksa
po reakciji:
150ml DH2O
dodajte NaOH PH 12+
100ml ksilena
spiranje s toplim in hladnim DH2O
ločen lijak
+20ml DH2O
+20ml DH2O
dodajte 35%HCL PH 7
izparevanje na toplem
speremo s hladnim acetonom
rekristalizacija v izopropilalkoholu z acetonom
pustimo v zamrzovalniku 12 ur
filtriramo

 

[G.Patton]

Datoteke priložite tukaj (na tej strani, brez drugih povezav).

 

[a_king]

Pozdravljeni, moj prijatelj, lahko mi kdo pokaže, kako narediti kristalno meto

 

[Pajmon]

What was your temperature for those 4 hours?


https://www.google.com/search?q=pre...i-terr2-rso2&sourceid=chrome-mobile&ie=UTF-8#

 

[Osmosis Vanderwaal]

when you reflux a liquid, you boil it. You hope to get then vapor to condense by the time it is 1/3-1/2 way up the column. It tells you the temperature, not the other way around. the temperature is whatever it takes to acheive that level of vapor up the columb

 

[Osmosis Vanderwaal]

You should at least go to PH 6.4 on the acidification, or you won't get a complete conversion. It should have precipitated from the xylene when you acidified itt. The water in the hcl doesn't help, but it shouldnt mix with the xylene and you can seperate that little bit of water and evaporate that instead 100m ml of xylene. Your yeilds suffered from those causes. 70% efficiency would be 2.5 grams. Some of your yield is salt that is the side product of NaOH and HCL, you can see the blocky crystals in with the shards