Chemistry and Chemical Reactivity (9th Edition)

Number of moles: $0.001023\ M\times 125.\ mL= 0.128\ mmol$ Mass: $0.128\ mmol\times 163.94\ mg/mmol=20.96\ mg$ Concentration of the ions: $0.003069\ M\ Na^+$ $0.001023\ M\ PO_4^{3-}$