You are right sugar is a mixture and salad, water and potassium are all wrong.
Your Welcome
1 becuse its all it can hold
pH can be defined as negative logarithm of hydronium ion concentration .
pH can be mathematical represented as :
pH =-log [H+]
[H+]=2.3*10^-9
pH= -log[2.3*10^-9]
=8.64
