f 23.6 mL of 0.200 M NaOH is required to neutralize 10.00 mL of a H3PO4 solution , what is the concentration of the phosphoric acid solution?Start by balancing the equation for the reaction: H3PO4(aq) + NaOH(aq) → Na3PO4(aq) + H2O(l)

Explanation:

Hello,

In this case, the balanced chemical reaction is:

Therefore, we compute the moles of used NaOH by the 0.2000-M solution:

Then, we compute the moles of neutralized phosphoric acid by their 1:3 molar ratio:

Finally, the concentration:

Best regards.

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