Summary
Samenvatting milieu
- Course
- Institution
Samenvatting van de aantekeningen en lesstof van het vak Milieu gegeven door Peter en Peter ;)
[Show more]
Seller
Follow
marjorie99
Content preview
Samenvatting theorie milieuLes 1 8-2-2019
Herhaling 2e klas:
Reactiesnelheid en evenwicht
Reactiesnelheid:
Toename of afname van een concentratie per tijdseenheid
Formule:
s = delta c / delta t
s = reactiesnelheid, mol/L*s
c = concentratie, mol/L
t = tijd, sec
Reactiesnelheid word beïnvloed door:
- Temperatuur
- Verdelingsgraad
- Concentratie
- Katalysator
- Licht
- Aard van de stof
Nieuwe stof
Chemisch evenwicht
1. De heengaande reactie verloopt net zo snel als de teruggaande reactie.
2. Concentraties van de stoffen veranderen niet meer
3. Ieder evenwicht heeft een evenwichtsvoorwaarde of evenwichtsconstante. De verhouding
tussen product van de concentraties van de reactieproducten en product van de
concentraties van uitgangsstoffen.
,Constante Kev (alleen afhankelijk van T) = eindstoffen / beginstoffen (concentratiebreuk)
Concentratiebreuk < Kev = de reactie verloopt naar rechts
Concentratiebreuk > Kev = de reactie verloopt naar links
Concentratiebreuk = Kev = de reactie is in evenwicht
Beinvloeden evenwicht:
Concentratie veranderen; vergroten of verkleinen.
pA + qB -> <- rC + sD
Kev = [C]^r * [D]^s / [A]^p * [B]^q
Waterevenwicht
2 H2O -> <- H3O+ + OH-
Kev = [H3O+] * [OH-] / [H2O]^2
K * [H2O]^2 = [H3O+] * [OH-]
Wat is de concentratie van water in 1L water? Geef in mol/L.
m/M=n, 1000g/18 = 55,6 mol/L
Kw = [H3O+] * [OH-]
Kw = 10^-14 bij 24 graden
Kw =
Waterconstante, mate van splitsing van water in H3O+ en OH-
, [H3O+] * [OH-] = 10^-14
X * X = 10^-14
X^2 = 10^-14
X = wortel 10^-14 = 10^-7 mol/L
10^-7 = pH 7
pH = -log [H3O+] = -log 10^-7 = 7
pOh = 14 – pH = 7, -log [OH-] = -log 10^-7 = 7
Kw = H3O+ + OH-
10^-14 = 10^-7 * 10^-7
pKW = pH + pOH
14 = 7 + 7
Huiswerk
Bereken de pH van:
- 0,2M HCl
-log(0,2) = 0,7
- 0,2M H2SO4
0,2 * 2 = 0,4. –log(0,4)= 0,4
- 0,1M HAc
-log(0,1)= 1
HCl -> H+ + Cl-
HAc = zwak zuur, splitst niet volledig in ionen.
HAc + H2O -> <- H3O+ + Ac-
The benefits of buying summaries with Stuvia:
Guaranteed quality through customer reviews
Stuvia customers have reviewed more than 700,000 summaries. This how you know that you are buying the best documents.
Quick and easy check-out
You can quickly pay through credit card or Stuvia-credit for the summaries. There is no membership needed.
Focus on what matters
Your fellow students write the study notes themselves, which is why the documents are always reliable and up-to-date. This ensures you quickly get to the core!
Frequently asked questions
What do I get when I buy this document?
You get a PDF, available immediately after your purchase. The purchased document is accessible anytime, anywhere and indefinitely through your profile.
Satisfaction guarantee: how does it work?
Our satisfaction guarantee ensures that you always find a study document that suits you well. You fill out a form, and our customer service team takes care of the rest.
Who am I buying these notes from?
Stuvia is a marketplace, so you are not buying this document from us, but from seller marjorie99. Stuvia facilitates payment to the seller.
Will I be stuck with a subscription?
No, you only buy these notes for $5.43. You're not tied to anything after your purchase.
Can Stuvia be trusted?
4.6 stars on Google & Trustpilot (+1000 reviews)
64438 documents were sold in the last 30 days
Founded in 2010, the go-to place to buy study notes for 14 years now