# Legal or Illegal?

Chemistry Level 2

In a work environment, the upper limit on ammonia (density $$0.771\text{ g/L}$$ at room temperature) concentration is $$50\text{ ppm}$$ (volume/volume). Air from a factory was drawn through a solution containing $$100\text{ ml}$$ of $$0.0105\text{ M}$$ solution of $$\ce{HCl}$$. Assume neutralization goes to completion. After drawing air through the acid solution for 10 minutes at a rate of $$10 \text{ L/min}$$, the remaining acid required $$13.1\text{ ml}$$ of $$0.0588\text{ M}$$ of $$\ce{NaOH}$$ for complete neutralisation. Is the factory legal?

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