Resistance to bases
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Denne side er ikke tilgængelig på dansk i Xperimania II. Hvis du ønsker, at dette sprog skal være tilgængeligt i fremtiden, så send venligst en e-mail til xperimania@eun.org Vi beklager eventuelle gener, som dette måtte medføre. Holdet bag Xperimania |
| Natural and artificial fibres behave differently when in contact with NaOH solution. | The resistance to bases of petrochemical materials is used in: |
| - Cloth - Towels - Curtains - Bed sheets - Equipment for chemical industries |
Experiment:
- Cut six 2 cm strips from different cloths made of natural and artificial fibres.
- Pour 5 ml 10 % NaOH solution into each tube and drop in strips of 6 kinds of cloth.
- Place test tubes in a can of hot water and boil for 10 minutes; after that place test tubes in a stand.
- Cut six 2 cm strips from different cloths made of natural and artificial fibres.
- Pour 5 ml 10 % NaOH solution into each tube and drop in strips of 6 kinds of cloth.
- Place test tubes in a can of hot water and boil for 10 minutes; after that place test tubes in a stand.
Leading questions:
- How do the strips react with the NaOH solution?
- Can you explain what's happening?
- Can you set up other easy experiments that show resistance to bases in action?
- Can you find applications of this property in your house or city?
Click "Download" to get the full kit. - How do the strips react with the NaOH solution?
- Can you explain what's happening?
- Can you set up other easy experiments that show resistance to bases in action?
- Can you find applications of this property in your house or city?
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