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Practicum Reactiesnelheid

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January 3, 2018
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March 5, 2020
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Naam: Plaatsnummer: Datum: nr. onbekende:


0 REACTIESNELHEID EN ACTIVERINGSENERGIE
OPMERKING: - Lees de vragen aandachtig!
- Overschrijd de opgegeven ruimte niet!
- Berekeningen en grafieken worden als bijlage toegevoegd!


DOEL

• De reactiesnelheid van een chemische reactie bepalen
• De reactieorde van de reagentia in een reactie bepalen
• Activeringsenergie van een reactie bepalen


REACTIEVGL

3 I- (aq) + H2O2 (aq) + 2H3O+ (aq) à I3- (aq) + 4H2O (l)

2S2O32- (aq) + I3- (aq) à3 I- (aq) + S4O62- (aq)


RESULTATEN


Concentratie Na2S2O3 (mol/L): 0,02

Volume Na2S2O3 (mL): 1,0

Concentratie KI (mol/L): 0,3

Concentratie H2O2 (mol/L): 0,1

Totaal volume (mL): 10,0

Temperatuur (°C en K) 21,6 en 293,6


A. Bepaling van de reactietijden


Exp nr. 1 2 3 4 5 6 7


Tijd (s) 147,20 67,96 49,86 32,95 87,43 62,97 220,16

, Naam: Plaatsnummer: Datum: nr. onbekende:

B. Berekeningen voor de bepaling van de reactiesnelheid


Exp nr. 1 2 3 4 5 6 7

mol Na2S2O3
0,02 0,02 0,02 0,02 0,02 0,02 0,02
verbruikt
mmol mmol mmol mmol mmol mmol mmol
(mol)
0,01 0,01 0,01 0,01 0,01 0,01 0,01
D(mol I3-)
mmol mmol mmol mmol mmol mmol mmol

∆(mol I-3 )
6,79 . 10-8 14,71 .10-8 20,06 .10-8 30,35 .10-8 11,44 .10-8 15,88 .10-8 4,54 .10-8
∆t

∆(mol I-3 )
log -7,16 -6,83 -6,70 -6,52 -6,94 -6,80 -7,34
∆t


Volume KI
1,0 2,0 3,0 4,0 1,0 1,0 1,0
(mL)


[I-]0 (mol/L) 0,03 0,06 0,09 0,12 0,03 0,03 0,03


log [I-]0 -1,52 -1,22 -1,05 -0,92 -1,52 -1,52 -1,52


Volume H2O2
3,0 3,0 3,0 3,0 5,0 7,0 2,0
(mL)

[H2O2]0
0,03 0,03 0,03 0,03 0,05 0,07 0,02
(mol/L)


log [H2O2]0 -1,52 -1,52 -1,52 -1,52 -1,30 -1,15 -1,70
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