Monitoring chemical reactions

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Question 28

Medium

In a titration, a 25.0 cm³ sample of phosphoric acid, $H3PO4\text{H}_3\text{PO}_4$ , of unknown concentration is titrated with 0.180 mol/dm³ sodium hydroxide solution, $NaOH\text{NaOH}$ .

\text{H}_3\text{PO}_4 + 3\text{NaOH} \rightarrow \text{Na}_3\text{PO}_4 + 3\text{H}_2\text{O}

It is found that 21.50 cm³ of the sodium hydroxide solution is required to completely neutralise the phosphoric acid.

Calculate the concentration of the phosphoric acid solution in $mol/dm3\text{mol/dm}^3$ . Give your answer to three significant figures.

[3]

Monitoring chemical reactions

Question 28

Monitoring chemical reactions Questions

Monitoring chemical reactions

Question 28

Monitoring chemical reactions Questions