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/customers/f/d/1/svpaul-lasoledat.com/httpd.www/wp-content/plugins/nextgen-gallery/products/photocrati_nextgen/modules/fs/package.module.fs.php on line 263 Warning: count(): Parameter must be an array or an object that implements Countable in /customers/f/d/1/svpaul-lasoledat.com/httpd.www/wp-content/plugins/nextgen-gallery/products/photocrati_nextgen/modules/fs/package.module.fs.php on line 263 Warning: Use of undefined constant ‘UPDRAFTPLUS_NO_BINZIP’ - assumed '‘UPDRAFTPLUS_NO_BINZIP’' (this will throw an Error in a future version of PHP) in /customers/f/d/1/svpaul-lasoledat.com/httpd.www/wp-config.php on line 107 ALUMNES DE TERCER D’ESO REALITZEN UNA PRÀCTICA AL LABORATORI – Col·legi Sant Vicenç de Paül – La Soledat Warning: count(): Parameter must be an array or an object that implements Countable in /customers/f/d/1/svpaul-lasoledat.com/httpd.www/wp-includes/post-template.php on line 284

ALUMNES DE TERCER D’ESO REALITZEN UNA PRÀCTICA AL LABORATORI

Els alumnes de tercer d’ESO han anat al laboratori per realitzar dues cromatografies.

La CROMATOGRAFIA  és una tècnica que es fa servir per separar els diversos components d’una mescla homogènia, aprofitant la diferent afinitat per un dissolvent, en el nostre cas “l’alcohol”.

 

Ø  -PRIMERA CROMATOGRAFIA DE PIGMENTS VEGETALS

Primer hem separat els pigments que donen el color verd als vegetals.

L’alcohol fa que cada pigment es desplaci a diferent velocitat depenent del grau de solubilitat de cada un.

Els pigments són els següents:

PIGMENTS

COLOR

Clorofil·la A

Verd

Clorofil·la B

Verd groguent

Carotens

Taronja

Xantofil·les

Groc

 

Ø  -SEGONA CROMATOGRAFIA DELS COMPONENTS DE LA TINTA NEGRA  DE RETOLADOR.

El color negre s’ha descompost en diferents colors, com veureu en el vídeo.

Per veure el video premeu AQUÍ

 

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