CH-1996

Titration calculations

Chemistry · Secondary 4 · Hard · Titration calculations

A student titrates 25.0 cm³ of sodium carbonate solution with 0.200 mol/dm³ hydrochloric acid. The average volume of acid used is 22.5 cm³. The equation is:

\,\text{Na}_2\text{CO}_3 + 2\text{HCl} \rightarrow 2\text{NaCl} + \text{CO}_2 + \text{H}_2\text{O} \,

.

What is the concentration of the sodium carbonate solution?

0.0450 mol/dm³
0.0900 mol/dm³
0.180 mol/dm³
0.400 mol/dm³

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