Summary
Summary Chemistry Alevel Acid Definitions Notes
- Course
- Institution
Chemistry Alevel Acid Definitions Notes
[Show more]
Seller
Follow
ramiriam
Reviews received
Content preview
Glossary: Acid DefinitionsAcid A proton donor - releases H+.
Acidic A buffer with a pH less than 7 - weak acid which is present alongside its
Buffer (conjugate base) salt to counteract changes in pH.
Base A proton acceptor - accepts H+.
Basic Buffer A buffer with a pH more than 7 - weak base which is present alongside its
(conjugate acid) to counteract changes in pH.
Buffer Resists changes in pH when small amounts of acid/alkali are added.
End Point The point during the titration when the indicator changes colour. A suitable
indicator should change colour near the equivalence point (so should have a
pH range within the pH change during the equivalence point).
Equivalence The point when full neutralisation occurs. When titrating an acid with a base, it
Point is the point when all acid has been neutralised, and so [H+ ]=[OH− ].
Indicator Indicators are chemical solutions which will change colour when there is a
change of pH. Methyl orange and phenolphthalein are indicators commonly
used in titrations. Methyl orange is red in an acid and changes to yellow in an
alkali. Phenolphthalein is colourless in an acid and changes to pink in an alkali.
Ka Ka = [H+] [A-]/[HA]
An acid disassociation constant.
A larger Ka means a stronger acid.
Kw Kw = [H+] [OH-]
Ionic product of water.
Monoprotic An acid which releases one H+ ion for each molecule present.
Diprotic A acid which releases two H+ ions for each molecule present.
Neutralisati A reaction between an acid and a base which react together to form water and
on a salt. The ionic equation for neutralisation:
H+ + OH- <=> H2O
pH -log10[H+]
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 ramiriam. Stuvia facilitates payment to the seller.
Will I be stuck with a subscription?
No, you only buy these notes for $4.41. You're not tied to anything after your purchase.
Can Stuvia be trusted?
4.6 stars on Google & Trustpilot (+1000 reviews)
75323 documents were sold in the last 30 days
Founded in 2010, the go-to place to buy study notes for 14 years now