Exam (elaborations)
AQA A LEVEL Chemistry Exam 2024 Review
- Course
- Institution
AQA A LEVEL Chemistry Exam 2024 Review
[Show more]
Content preview
AQA A LEVEL Chemistry Exam2024 Review
Relative atomic mass - Answer>> The average mass of an
atom of an element, relative to 1/12th of the mass of an atom of
Carbon-12
Relative molecular mass - Answer>> Average mass of a
molecule compared to 1/12th of the mass of a carbon-12 atom
The Avogradro constant - Answer>> the number of particles in
a mole
ideal gas equation - Answer>> pV = nRT
empirical formula - Answer>> the simplest whole number ratio
of atoms of each element in a compound
percentage atom economy - Answer>> (Mass of desired
product/total mass of reactants) x 100
ionic bonding - Answer>> the electrostatic attraction between
oppositely charged ions in a lattice
covalent bond - Answer>> a shared pair of electrons between
non-metal elements
co-ordinate bond - Answer>> a shared pair of electrons where
both electrons are supplied by one atom
repulsion in shapes of molecules - Answer>> Lone pair-lone
pair > lone pair-bonding pair > bonding pair-bonding pair
, electronegativity - Answer>> the power of an atom to attract the
pair of electrons in a covalent bond
hess' law - Answer>> Total enthalpy change for a reaction is
independent of the route chosen
mean bond enthalpy - Answer>> The energy required to break
a covalent bond into gaseous atoms averaged over different
molecules
Bonds broken - bonds made
activation energy - Answer>> The minimum amount of energy
needed to start a chemical reaction
catalyst - Answer>> A substance that increases the rate of a
chemical reaction without being changed by providing an
alternative reaction pathway by lowering activation energy
Le Chatelier's principle - Answer>> When a system in dynamic
equilibrium is subjected to change, the position of equilibrium will
shift to oppose the change.
oxidising agents - Answer>> electron acceptors
reducing agents - Answer>> electron donors
Enthalpy of formation - Answer>> Enthalpy change when one
mole of a compound is formed from its constituent elements
under standard conditions in their standard states
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 $10.39. 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