Exam (elaborations)
Edexcel A level Chemistry Topic 11. Equilibrium 2 Exam 2024 Questions and Answers 100% Pass
- Course
- Institution
Edexcel A level Chemistry Topic 11. Equilibrium 2 Exam 2024 Questions and Answers 100% Pass
[Show more]
Seller
Follow
RevisionKing
Reviews received
Content preview
Edexcel A level Chemistry Topic 11.Equilibrium 2 Exam 2024 Questions and
Answers 100% Pass
Describe a dynamic equilibrium - Answer>>Dynamic equilibrium
- Rate of forward reaction = rate of reverse reaction
- Concentrations of all reactants and products remain constant.
- The system is closed, and on the large scale (macroscopic)
everything is constant.
What happens if the conditions of an equilibrium reaction change?
- Answer>>- equilibrium will move so that it can be re-
established ( Le Chatliers Principle)
Define Homogenous equilibrium. - Answer>>- all the chemicals
(reactants and products) are in the same phase
Define Heterogenous equilibrium. - Answer>>- different states
of matter are present in the equilibrium.
What is the equilibrium constant Kc? - Answer>>- product of
product concentration to reactant concentration.
Why aren't solids or pure liquids included in the value of Kc in a
heterogenous equilibrium? - Answer>>- because their
concentrations relatively remain the same throughout the reaction
How to calculate units for Kc? - Answer>>- replace the terms in
the Kc expression with their units
- cancel
What is affected by Kc? - Answer>>TEMPERATURE
, What is NOT affected by Kc? - Answer>>- change in pressure
-change in conc of reactants or products
- adding a catalyst.
What two ways can you use to determine the concentration of
reactants or products at equilibrium? - Answer>>1. Titration
2. Colourimeter
How can you use titration to determine the conc of reactants or
products at equilibrium? - Answer>>-
How can you use colourimetry to determine the conc of reactants
or products at equilibrium? - Answer>>- measures the amount
of light absorbed by the mixture
-informs you of how concentrated the mixture is.
- the more light absorbed, the higher the concentration of the
coloured substance.
How to work out equilibrium moles if given initial moles and mole
of one substance at equilibrium? - Answer>>- use
I: initial moles
C:change in moles
E:equilibrium moles
-using the initial and equilibrium moles of the substance given,
work out change in oles
-look at the reaction equation to see stoichiometry of the
reactants/products
-use this to work out the equilibrium moles of the other
substances
(Products always have initial moles of 0)
How to calculate Kc? - Answer>>- calculate/find initial moles of
all the substances
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 RevisionKing. Stuvia facilitates payment to the seller.
Will I be stuck with a subscription?
No, you only buy these notes for $7.49. You're not tied to anything after your purchase.
Can Stuvia be trusted?
4.6 stars on Google & Trustpilot (+1000 reviews)
77254 documents were sold in the last 30 days
Founded in 2010, the go-to place to buy study notes for 14 years now