Consider separate solutions of 0.500 M ${\mathrm{C}}_2{\mathrm{H}}_5\mathrm{OH}\left(\mathrm{aq}\right)$, $0.100M, {\mathrm{Mg}}_3{\left({\mathrm{PO}}_4\right)}_2\left(\mathrm{aq}s\right)$, 0.250M $\mathrm{KBr}\left(\mathrm{aq}\right)$ and 0.125M ${\mathrm{Na}}_3{\mathrm{PO}}_4\left(\mathrm{aq}\right)$ at 25°C Which statement is true but about these solutions assuming all salts to be strong electrolytes ?