Help Notes: What is the Na+ ion concentration in the solution formed by mixing 20. mL of 0.10 M Na2SO4 solution with 50. mL of 0.30 M Na3PO4 solution?

Wednesday, 14 December 2011

$\displaystyle{N}{a}_{{2}}{S}{O}_{{4}}\rightarrow$
2Na^++SO_4^(2-)

$\displaystyle{N}{a}_{{3}}{P}{O}_{{4}}\rightarrow{3}{N}{{a}}^{+}+{P}{{O}_{{4}}^{{{3}-}}}$

Mole ratio

$\displaystyle{N}{a}_{{2}}{S}{O}_{{4}}:{N}{{a}}^{+}={1}:{2}$

$\displaystyle{N}{a}_{{3}}{P}{O}_{{4}}:{N}{{a}}^{+}={1}:{3}$

Amount of $\displaystyle{N}{a}_{{2}}{S}{O}_{{4}}$
used $\displaystyle=\frac{{0.1}}{{1000}}\times{20}$

Amount of $\displaystyle{N}{{a}}^{+}$ from $\displaystyle{N}{a}_{{2}}{S}{O}_{{4}}=\ldots$

Help Notes