Answer:
0.377 M
Explanation:
Given that:
mass of [tex]K_3PO_4[/tex] = 7.00 g
the molar mass of [tex]K_3PO_4[/tex] = 212.27 g/mol
number of moles = [tex]\frac{mass }{molar mass}[/tex]
number of moles of [tex]K_3PO_4[/tex] = [tex]\frac{7.00}{212.27}[/tex]
= 0.0330
The dissociation of K₃PO₄(aq) → 3K⁺(aq) + PO₄³⁻(aq)
So number of Ions formed = 3 K + and 1 PO₄³⁻ = 4 ions
No of moles of ions = 4 × 0.0330
Molarity = 4 × 0.0330/ ( 350/1000)
= 0.377 M
Hence, the total concentration of ions in a solution prepared by dissolving 7.00 g of K3PO4 in enough water to make 350. mL of solution = 0.377 M
