Mg can reduce to in basic solution: NO _3^- + Mg (s) + H _2 O Mg ( OH )_2(s) + OH…

CHEMISTRY · Subjective · CBSE · Chemistry · Redox Reactions · Redox Reactions

Problem

Mg can reduce NO3−\text{NO}_3^- to NH3\text{NH}_3 in basic solution: NO3−+Mg(s)+H2O⟶Mg(OH)2(s)+OH−(aq.)+NH3(g)\text{NO}_3^- + \text{Mg}(s) + \text{H}_2\text{O} \longrightarrow \text{Mg}(\text{OH})_2(s) + \text{OH}^-(aq.) + \text{NH}_3(g) A 25.0 mL sample of NO3−\text{NO}_3^- solution was treated with Mg. The NH3(g)\text{NH}_3(g) was passed into 50 mL of 0.15 N HCl. The excess HCl required 32.10 mL of 0.10 M NaOH for its neutralization. What was the molarity of NO3−\text{NO}_3^- ions in the original sample?

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