What is a buffer and what do you need to make one?
A buffer is a solution which resists changes in pH when alkaline or acidic solution is added to it.
Buffers are created based on the equilibrium of a proton donor/ acceptor and the conjugate base/ acid. For example, a weak acid and it's salt can act as a buffer. The weak acid hardly dissociates whilst the salt fully dissociates to give a large concentration of ions. The weak acid and its dissociated ion then exist in equilibrium to resist changes in pH made by adding or withdrawing protons.
FB
Related Chemistry A Level answers
All answers ▸State and explain the effect of the following on the rate of a reaction: a) increasing temp b) increasing pressure c) increasing concentration of ONE reactant d) adding a catalyst. In each case state what will happen to the rate constant, k.
The following equilibrium is set up in a glass syringe. 2(NO2) (brown gas) ‹-› N2O4 (colourless gas) ∆H = -58 kJmol-1. Using le Chatelier's principle, predict and explain how heating up the mixture would affect it's appearance.
Give and explain 2 of the anomalous properties of ice caused by hydrogen bonding
What evidences are used to prove that Benzene's kekule model is incorrect and that Benzene has a delocalised Pi structure.