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Norwegian

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Submitted By shallga
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Brennende magnesium • Mathias Hafredal Johansen • Brennende magnesium • 19.11.13

MÅL/HENSIKT • Lære forskjellen på metallbindinger og ionebindinger • Hva som skjer når magnesium reagerer kjemisk med oksygen
UTSTYR/FIGUR
Magnesium tråd, lyspære, lyspæreholder, ledninger, 1,5v batteri, digeltang, gassbrenner, glasskål
[pic][pic]
FREMGANGSMÅTE
Hvor sterkt er magnesium?
Prøvde å få magnesiumbåndet til å ryke ved å trekke i hverandre.
Funka ikke.
Konklusjon: Sterkt.
Er det fleksibelt?
Prøvde å bøye magnesium til det knakk
Kunne bøye det så mye man orket uten at det knakk
Konklusjon: meget bøyelig
Testet fargen
Gned magnesium med sandpapir
Magnesiumet ble blankere
Konklusjon: Farven er «sølvblank metall-glans»
Leder magnesium elektrisk strøm?
Sjekket først om lyspæra lyste
Koblet magnesium inn i kretsen
Testet om pæra lyste
Pæra lyste.
Brenne magnesium
Tente på gassbrenner.
Tar tak i magnesiumbiten med digeltanga,
Brenner magnesiumen
Et skarpt lys, på linje med en sveiseflamme
Prøver å koble ledninger til stoffet
RESULTAT/OBSERVASJONER
• Når vi antente magnesiumet kom det en hvit, sterk flamme, som kunne sammenliknes med en sveiseflamme • Stoffet ble helt porøst og svakt og ledet ikke lengre strøm • Fargen har blitt hvit
|Egenskaper |FØR BR. |ETTER BR. |
|FARGE |Sølvblank metall-glans |Hvitt |
|STYRKE |STERK! |Ingen |
|FLEKSIB. |Meget |Ingen |
|EVNE TIL Å LEDE |God |Ingen |
|STRØM | | |
|Bindinger |Metallbinding |Ionebinding |

• Stoffet tålte ingenting og ble til et pulver når du tok på det • Det nye stoffet heter magnesiumoksid ( MgO Fullstendig tabell over det som endret seg:

FORKLARINGER TIL RESULTAT/OBSERVASJONER • Magnesium reagert med oksygen ved følgende reaksjonslikning 2Mg + O2 ( MgO2 Magnesium + Oksygen ( Magnesiumoksid

Det er to magnesium atomer fordi det er ALTID to oksygen atomer i oksygenet vi finner i luft er alltid i form av O2. O2 har nemlig to atomer i seg.

Vi skriver ikke magnesiumoksid som Mg2O2 for da får man Magnesium dioksid.

DRØFTING OG FEILKILDER • Her kan jeg ikke finne noen feilkilder
KONKLUSJON
• Det dannes en ionebinding når man brenner magnesium. • Det dannes et hvitt pulver kalt magnesiumoksid (MgO)
Det dannes en luktfri, brennbar og fargeløs gass når sink reagerer med saltsyre.…...

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