January 30, 2012

jv-ong: 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. OMG TOLLEN’S REAGENT! I remember using this stuff as a sophomore 

jv-ong:

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.

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

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  1. saladsarecool reblogged this from callstheadventurescience
  2. ggcc-aaaaatacaaaaaa-aaaaaaaaa reblogged this from callstheadventurescience and added:
    Anyone remember this from o-chem?
  3. callstheadventurescience reblogged this from hydrides
  4. tapedvision reblogged this from invaderxan
  5. invaderxan reblogged this from laboratoryequipment
  6. ciapachix728 reblogged this from jv-ong
  7. jv-ong reblogged this from fyeahchemistry and added:
    OMG TOLLEN’S REAGENT! I remember using this stuff as a sophomore
  8. midgetmonkey reblogged this from fyeahchemistry
  9. -starfishies- reblogged this from fyeahchemistry
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  12. dudadubois reblogged this from laboratoryequipment
  13. mean-everything-to-nothing reblogged this from discereetdocere and added:
    Is it weird I actually understand all of this?
  14. discereetdocere reblogged this from fyeahchemistry
  15. burningthecandleatbothends reblogged this from shychemist
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  25. rinja reblogged this from fyeahchemistry
  26. ednoel reblogged this from fyeahchemistry and added:
    org chem days :’D
  27. 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...
  28. vincentfaucher reblogged this from fyeahchemistry
  29. crazydancingdays reblogged this from fyeahchemistry and added:
    “sadly, we can’t do this, Silver Nitrate is too expensive” ¬¬’ #thirdworlduniversityproblems
  30. wardahhajiisa reblogged this from fyeahchemistry and added:
    I’ve done this before, I miss that moment :’D
  31. sirmewly reblogged this from fyeahchemistry
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