The Attempt at a Solution
From what I know, to make buffer solutions you need a weak acid or base and it's salt. Non of the options has this. What am I missing?
A buffer solution is a solution that resists changes in pH when small amounts of acid or base are added. It consists of a weak acid and its conjugate base (or a weak base and its conjugate acid) in roughly equal amounts.
Buffer solutions work by utilizing the principle of Le Chatelier's principle. When a small amount of acid or base is added to a buffer solution, the equilibrium between the weak acid and its conjugate base is shifted, causing a minimal change in pH.
The purpose of a buffer solution is to maintain a constant pH level in a solution. This is important in many biological and chemical processes as even small changes in pH can have a significant impact on the outcome of a reaction.
A buffer solution can be prepared by mixing a weak acid (or base) with its conjugate base (or acid) in a 1:1 ratio. The concentration of the components depends on the desired pH level of the buffer solution.
The pH range of a buffer solution is typically within one pH unit of the pKa of the weak acid or base used. This ensures that the buffer solution is most effective in resisting changes in pH.