Kemi
Afstem
27. september 2011 af
shumanoo (Slettet)
Hejsa.
Jeg har lige et spg som jeg har bikset med i et stykke tid, ville høre om nogen ville se om jeg havde gjort det rigtigt :)
Opgaven lyder: Du vil fjerne kalken i din elkedel og vælger husholdningseddiken til det. Følgende reaktion forløber :
CaCO3(s)+CH3COOH(l) --> CO2 (g) + H2O (l) + Ca(CH3COO)2
Afstem reaktionsskemaet og beregn hvor mange gram ren edikkesyre du skal bruge, hvis der er 2 gram kalk (CACO3) i din kedel.
Beregn hvor mange mL husholdningseddike du skal bruge til at opløse de 2 gram:
Svar
Afstem : CaCO3 + 2CH3COOH ---> CO2 + H2O + CA(CH3COO)2
<p class="MsoNormal" style="margin-bottom:12.0pt;mso-pagination:none;mso-layout-grid-align: none;text-autospace:none"> <span lang="EN-US" style="font-size:10.0pt;font-family: Arial;mso-bidi-font-family:Arial;color:#1A1A1A;mso-ansi-language:EN-US">2 gram kalk :<span lang="EN-US" style="font-family:Arial;mso-bidi-font-family: Arial;color:#1A1A1A;mso-ansi-language:EN-US"></o:p> <p class="MsoNormal" style="margin-bottom:12.0pt;mso-pagination:none;mso-layout-grid-align: none;text-autospace:none"> <span lang="EN-US" style="font-size:20.0pt;mso-bidi-font-size: 10.0pt;font-family:Arial;mso-bidi-font-family:Arial;color:#1A1A1A;mso-ansi-language: EN-US">Caco3</o:p> <p class="MsoNormal" style="margin-bottom:12.0pt;mso-pagination:none;mso-layout-grid-align: none;text-autospace:none"> <span lang="EN-US" style="font-size:20.0pt;mso-bidi-font-size: 10.0pt;font-family:Arial;mso-bidi-font-family:Arial;color:#1A1A1A;mso-ansi-language: EN-US">M = 100,9</o:p> <p class="MsoNormal" style="margin-bottom:12.0pt;mso-pagination:none;mso-layout-grid-align: none;text-autospace:none"> <span lang="EN-US" style="font-size:20.0pt;mso-bidi-font-size: 10.0pt;font-family:Arial;mso-bidi-font-family:Arial;color:#1A1A1A;mso-ansi-language: EN-US">M = 2 g</o:p> <p class="MsoNormal" style="margin-bottom:12.0pt;mso-pagination:none;mso-layout-grid-align: none;text-autospace:none"> <span lang="EN-US" style="font-size:20.0pt;mso-bidi-font-size: 10.0pt;font-family:Arial;mso-bidi-font-family:Arial;color:#1A1A1A;mso-ansi-language: EN-US">N = 0,0199</o:p> <p class="MsoNormal" style="margin-bottom:12.0pt;mso-pagination:none;mso-layout-grid-align: none;text-autospace:none"> <span lang="EN-US" style="font-size:20.0pt;mso-bidi-font-size: 10.0pt;font-family:Arial;mso-bidi-font-family:Arial;color:#1A1A1A;mso-ansi-language: EN-US">2CH3COOH</o:p> <p class="MsoNormal" style="margin-bottom:12.0pt;mso-pagination:none;mso-layout-grid-align: none;text-autospace:none"> <span lang="EN-US" style="font-size:20.0pt;mso-bidi-font-size: 10.0pt;font-family:Arial;mso-bidi-font-family:Arial;color:#1A1A1A;mso-ansi-language: EN-US">M = 60,052</o:p> <p class="MsoNormal" style="margin-bottom:12.0pt;mso-pagination:none;mso-layout-grid-align: none;text-autospace:none"> <span lang="EN-US" style="font-size:20.0pt;mso-bidi-font-size: 10.0pt;font-family:Arial;mso-bidi-font-family:Arial;color:#1A1A1A;mso-ansi-language: EN-US">M = 0,599 g</o:p> <p class="MsoNormal" style="margin-bottom:12.0pt;mso-pagination:none;mso-layout-grid-align: none;text-autospace:none"> <span lang="EN-US" style="font-size:20.0pt;mso-bidi-font-size: 10.0pt;font-family:Arial;mso-bidi-font-family:Arial;color:#1A1A1A;mso-ansi-language: EN-US">N = 0,00991 <p class="MsoNormal" style="margin-bottom:12.0pt;mso-pagination:none;mso-layout-grid-align: none;text-autospace:none"> <span lang="EN-US" style="font-size:20.0pt;mso-bidi-font-size: 10.0pt;font-family:Arial;mso-bidi-font-family:Arial;color:#1A1A1A;mso-ansi-language: EN-US"></o:p> <p class="MsoNormal" style="margin-bottom:12.0pt;mso-pagination:none;mso-layout-grid-align: none;text-autospace:none"> <span lang="EN-US" style="font-size:20.0pt; mso-bidi-font-size:8.0pt;font-family:Arial;mso-bidi-font-family:Arial; color:#1A1A1A;mso-ansi-language:EN-US">Er det korrekt lavet? </o:p> <p class="MsoNormal" style="margin-bottom:12.0pt;mso-pagination:none;mso-layout-grid-align: none;text-autospace:none"> <span lang="EN-US" style="font-size:24.0pt; mso-bidi-font-size:8.0pt;font-family:Arial;mso-bidi-font-family:Arial; color:#1A1A1A;mso-ansi-language:EN-US"> </o:p>
</o:p>
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