Does ascorbic acid dissociates completely in aqueous solution
Answers
Answer:
Explanation:
Dissolve the Vitamin C powder in the water.
If only using water and Vitamin C, you are done. This will store for up to 2 weeks or longer in the fridge.
If using glycerine, dissolve the Vitamin C in the smaller amount of water, then stir in glycerine and store.Weak acids do not completely ionize in solution. As a result, an acid-base equilibrium is established. When a weak acid, denoted generically by HA, is dissolved in water, the following equilibrium is established:
HA(aq) + H2O(aq) <==> H3O+(aq) + A-(aq)
We can quantify this reaction, like any other equilibrium, by using equilibrium constant, Ka :
Ka = [H3O+][A-]
[HA]
which is called an acid-ionization constant. The degree of ionization of a weak electrolyte is the fraction of molecules that react with water to give ions. Equilibria involving weak bases are treated similarly to those for weak acids. In general, a weak base B with the base ionization
B(aq) + H2O(l) <==> HB+(aq) + OH-(aq)
has a base-ionization constant, Kb (the equilibrium constant for the ionization of a weak base), equal to
Kb = [NB+][OH-]
[B]
Answer:
Ascorbic acid is one of the most common interfering substances that affects the accuracy of glucose biosensors [72,73], especially for glucose biosensors based on electrochemical analysis. Ascorbic acid is oxidized at the electrode surface, thus resulting in the production of more electrons further generating more current