fyeahuniverse:

image by Flickr/Cyberchemist

The Tollen’s Reagent is used to determine whether a solution contains an aldehyde or a ketone.

Dilute sodium hydroxide is added to aqueous silver nitrate, this gives silver oxide, sodium nitrate and water.

2 AgNO₃ (aq) + 2 NaOH (aq) → Ag₂O (s) + 2 NaNO₃ (aq) + H₂O (l)

Then, aqueous ammonia is added to the solution until it goes clear. This is due to the now silver ions existing as [Ag(NH₃)₂]⁺ complexes.

Ag₂O (s) + 4 NH₃ (aq) + 2 NaNO₃ (aq) + H₂O (l) → 2 Ag(NH₃)₂NO₃(aq) + 2 NaOH (aq)

The silver precipitates out onto the inside of the container, giving the notable silver mirror as seen above.

org chem days :’D

(via fyeahchemistry)

1. melazuda reblogged this from fyeahuniverse and added:

   puro que sabe la reaccion de tollens! :$

2. sufferingisacatalystforgreatness liked this
3. yougottaspeakup liked this
4. saladsarecool reblogged this from callstheadventurescience
5. ggcc-aaaaatacaaaaaa-aaaaaaaaa reblogged this from callstheadventurescience and added:

   Anyone remember this from o-chem?

6. callstheadventurescience reblogged this from hydrides
7. tapedvision reblogged this from invaderxan
8. invaderxan reblogged this from laboratoryequipment
9. patingtings liked this
10. ciapachix728 reblogged this from jv-ong
11. jv-ong reblogged this from fyeahchemistry and added:

    OMG TOLLEN’S REAGENT! I remember using this stuff as a sophomore

12. midgetmonkey reblogged this from fyeahchemistry
13. -starfishies- reblogged this from fyeahchemistry
14. notenoughpearls reblogged this from rinja
15. recent-business-news liked this
16. abcstarstuff reblogged this from fyeahchemistry
17. biocas liked this
18. dudadubois reblogged this from laboratoryequipment
19. frabarz liked this
20. ghett0weave liked this
21. mean-everything-to-nothing reblogged this from discereetdocere and added:

    Is it weird I actually understand all of this?

22. runstresslife liked this
23. discereetdocere reblogged this from fyeahchemistry
24. fefisbefi reblogged this from shychemist
25. laboratoryequipment reblogged this from fyeahchemistry
26. defenestrates reblogged this from fyeahchemistry
27. isawjennywiththedevil reblogged this from fyeahchemistry
28. themildchild liked this
29. phillipmorris liked this
30. drdiq reblogged this from peloria
31. peloria reblogged this from fyeahchemistry
32. itsthursday reblogged this from fyeahchemistry
33. leegacy reblogged this from fyeahchemistry
34. 1000needles reblogged this from fyeahchemistry
35. elsepm reblogged this from fyeahchemistry
36. rinja reblogged this from fyeahchemistry
37. ednoel reblogged this from fyeahchemistry and added:

    org chem days :’D

38. ednoel liked this
39. thelovedbird liked this
40. sleimok reblogged this from hydrides and added:

    it’s funny how i’ve used this in high school but we weren’t allowed to use it in college when we actually needed to...

41. redbeanice liked this
42. chronaxie liked this
43. lessthanaverage liked this
44. stella-nox liked this
45. vincentfaucher reblogged this from fyeahchemistry
46. crazydancingdays reblogged this from fyeahchemistry and added:

    “sadly, we can’t do this, Silver Nitrate is too expensive” ¬¬’ #thirdworlduniversityproblems

47. wardahhajiisa reblogged this from fyeahchemistry and added:

    I’ve done this before, I miss that moment :’D

48. siwohandro liked this
49. sirmewly reblogged this from fyeahchemistry
50. exodushoneyy reblogged this from hynora
51. Show more notesLoading...