Karboksylsyrer
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KARBOKSYLSYRER. SVAKE SYRER. …gir sur smak og gjør maten holdbar. Kjennetegn: COOH -gruppe. METANSYRE ( maursyre ) H COOH Ett C -atom. ETANSYRE ( eddiksyre ) C 2 H 3 COOH. PROPANSYRE C 2 H 5 COOH. EGENSKAPER FOR SYRER. PH- verdi lavere enn 7. Smaker surt.

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KARBOKSYLSYRER

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KARBOKSYLSYRER

SVAKE SYRER


…gir sur smak og gjør maten holdbar


Kjennetegn: COOH-gruppe

  • METANSYRE ( maursyre )

  • HCOOH

  • Ett C -atom


  • ETANSYRE ( eddiksyre )

  • C2H3COOH


  • PROPANSYRE

  • C2H5COOH


EGENSKAPER FOR SYRER

  • PH- verdi lavere enn 7


Smaker surt


Forandrer fargen på en indikator


  • Danner CO2 ved reaksjon med natron eller kalkstein


Danner hydrogengass sammen med et uedelt metall som Zink


Motvirker en basesyrer og baser nøytraliserer hverandre

  • H3O˖ + OH- → 2H2O


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