Here's what I get.
Citric acid (#"H"_3"Cit"#) is a weak tricarboxylic acid with the chemical formula #"C"_6"H"_8"O"_7#.
Although the degree of dissociation depends on concentration, a reasonable rule of thumb is that citric acid is about 8 % ionized.
Thus, if you start with 1 mol of #"H"_3"Cit"#, the equilibrium solution will contain about #"0.92 mol H"_3"Cit, 0.08 mol H"^"+"#, and #"0.08 mol H"_2"Cit"^"-"#.
Thus 1 mol of #"H"_3"Cit"# produces 1.08 mol of "particles".
#"K"_2"HPO"_4# is an ionic substance.
It dissociates completely in solution:
#"K"_2"HPO"_4"(aq)" → "2K"^"+""(aq)" + "HPO"_4^"-""(aq)"#
The hydrogen phosphate ion is such a weak acid that we can ignore its ionization.
Thus 1 mol of #"K"_2"HPO"_4"# produces 3 mol of "particles" in solution.