fredag den 12. april 2013

Sæbe og rødkål 2 -- Soap and Red Cabbage 2

     Efter at Sue Elvis nævnet mig i sin blog, følte jeg mig fristet til at skrive en post om alle de mislykkede projekter, de sure Ugleunger og den knotne Uglemor, man ind i mellem også kan opleve i Ugleboet. Men så gik det op for mig, at alle mennesker oplever dårlige dage, mislykkede projekter og gør ting de ikke er stolte af bagefter. Det er ikke værd at skrive om. Kun hvis man har lært noget der kan bruges af andre end en selv, eller det på anden måde er interessant, måske bare morsomt eller tragikomisk. 
     Jeg tvivler også på at der er nogen der har lyst til at læse om at vores vaskemaskine er brudt sammen og teknikeren var her uden den rette del i går, at der trænger til at blive støvsuget i entreen, at vejret er trist og gråt i dag og så videre. Det er nok bedst hvis Uglemor som lovet fortsætter sagaen om sæbe og rødkål. Så her er del 2: 

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After Sue Elvis worte a blogpost on me and the Danish language  I felt I was presenting a heavily edited side of myself to the world. Maybe I should post about the unfinished projects that lie around, all the dust mice in our back room, lazy and dour Owlets, angry MotherOwl, or maybe of our laundry machine that decided to break down, and the repairman who came without bringing the right spare parts ... 

Then I realized that we all have bad days, unfinished or unsuccessful projects etc. and do things we rather would have not done. The important thing here is to say I'm sorry, or say a prayer and then go on. It is only interesting to other if you learned something from it or it is encouraging or  funny in an even so small way. 

MotherOwl then decided to proceed as planned and proudly  presents Soap and Red Cabbage part 2.
 
 
  • Legende hænder i Ugleboet. 
  • Playing hands in the Owlery.

      Uglemor undrede sig. Kunne det virkelig være den lille smule eddike i dunken, der havde gjort 5 liter demineraliseret vand så surt? Efter at Ugleungerne var puttet, studerede Uglemor på nettet og under demineraliseret vand, læste hun følgende: "Når vand er i kontakt med luft selv i kort tid, opløser det CO2 og danner en fortyndet kulsyre. Det medfører en pH-sænkning til ca. 5,7 ved normalt atmosfærisk partialtryk af CO2." (http://da.wikipedia.org/wiki/Vand)  Aha. det passede jo perfekt med at vi havde målt pH i neutralopløsningen til ca. 6. Eddikedunken blev prompte frikendt.

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MotheOwl was wondering. Was a small amount of vinegar really able to turn almost 5 litres of demineralized water that acetic?After the Owlets went to bed, MotherOwl studied, and found following in wikipedia: In practice, pure water is very difficult to produce. Water left exposed to air for any length of time will dissolve carbon dioxide, forming a dilute solution of carbonic acid, with a limiting pH of about 5.7.(Wikipedia). That was the reason why our "neutral" solution measured at approximately pH 6. My vinegar jug was not the culprit after all.


  • Sæbe med rødkålsvand, lige hældt i formene. 
  • The red cabbage soap, just poured into the moulds.
     Onsdag morgen lavede vi så sæbe. Vi ville jo følge farveskiftet dagen igennem, og jeg fortalte Ugleungerne om at vand blev surt, når det fik lov at stå. Sæben vedblev med at være lysegul, og dagen igennem dryppede vi af og til en dråbe af den neutrale blå opløsning på sæben, og dråberne blev helt gule. I starten lige med det samme, men ud på eftermiddagen gik det lidt langsommere. Vi kunne nå at se det skifte over grønt til gul. Ud på aftenen blev det så langsomt, at jeg kunne nå at hente kameraet og tage et billede af det grønne vand på sæben.

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Wednesday morning we made soap with the yellow lye, we wanted to see the colour changes during the day. I told the Owlet of the acidification of water left alone. Nothing happened to the colour of the soap, but a drop of the blue cabbage water turned yellow on the soap. In the beginning the colour changed instantly, in the late afternoon we could see it change to green and then slowly to yellow. In the evening I even succeeded in making a photo of the change in progress.
 

  • Rødkålsvand på sæben. Vi prøvede en gang i timen (cirka), det gule er gammelt, og det blå-grønne er helt nyt. 
  • We dripped a drop or two on the soap every hour (almost). The yellow drop is old and the greenish-blue the recent one.

  • Bevis på vands forsuring ved henstand. 
  • Proof that water left alone is slowly turning acidic.

     Torsdag morgen var vores blå rødkålsvand så blevet pink. Forsuringen var sket! Godt vi havde fundet ud af hvad det var, ellers havde vi nok undret os meget. Vi stoppede sæbetestningen og tog den ud af formen.Der skete ikke yderliger ændringer med sæbens farve. Rødkålsindikatoren er en engangs-fornøjelse. Når den kemiske proces har ændret farven en gang, kan man kun gøre en sur blanding endnu surere eller en basisk blanding endnu mere basisk. Hvis man blander dem sammen for at få neutral pH igen - ja vi prøvede - er resultatet en meget gennemsigtig rosa eller gulliggrøn.

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Thursday morning the blue water had turned pink! Living proof that acidification happens. Luckily we had read about it, else we would have wondered how this happened. .We stopped testing the soap, and de-moulded it. No further change of colour had happened to the soap.  Red cabbage indicator is a one way thing. Once you have put either acetic or alkaline test substances in it, it can only be pushed further away from neutral. If you mix it back up - yes we tried - it yields an almost transparent pink or green tinged yellow.  What a pity.  I had had pictures of greenish-blue soaps in my mind.

  • Sæberne netop kommet ud af formen. Det er de hvideste sæber, nogensinde fremstillet i Ugleboet ;)
  • Just de-moulded soaps. It is the whitest batch of soaps ever made in the Owlery ;)

6 kommentarer:

  1. Ok, det var en anelse skuffende at der INGENTING skete med de sæber....

    SvarSlet
    Svar
    1. Det kan vi kun være helt enige om. som jeg skriver, havde jeg set frem til blågrønne sæber, eller i det mindste at kunne følge saponificeringsprocessen ved et farveskift. Gad vide hvordan det vil være hvis vi kunne få fat i det det man bruger i kemiundervisningen. Det skifter jo i hvert fald tilbage igen. Men måske er det ikke egnet til sæbe?

      Slet
  2. Hi Uglemor,

    I'm Sue Elvis' sister, visiting from her blog. I've just enjoyed a lovely half hour browsing your posts. I love your homemaking style! I'm trying to learn new homemaking skills and find new ideas so I'm looking forward to learning more from you.

    You live in a beautiful place - it's so wonderful to be able to share and learn from different cultures like this. Thank you for your English translations!

    SvarSlet
    Svar
    1. Thanks for your kind words. I have to visit your blog as well. Your life in Australia is very different from mine, and I'm learning a lot as well.

      Slet
  3. Hi Uglemor,

    Don't worry about the unfinished projects and dust mites. We all have them! That goes without saying.

    You are a scientist! I have read your last two posts with much interest. You would make a wonderful homeschooling mother. Have your children gone back to school yet?

    God bless!

    SvarSlet
    Svar
    1. That's so funny. One of the last words I would use about my self is "scientist" but my curiosity makes me discover a number of subjects, I never dreamed of touching back in school.
      Ever since my coldest child started school, I have dreamt of homeschooling, but it is very deviant behaviour here in Denmark. Homeschooling is for very ill children or for people belonging to strange sects. I know of one family homeschooling just because they want to. But as this lockout seems to continue, I can homeschool to my hearts content. We all enjoy it, and as spring has arrived, much nature is included.

      Slet