What is the concentration of $\mathrm{NO_{3}^{-}}$ ions when equal volumes of $0.1\,\mathrm{M}\,\mathrm{AgNO_{3}}$ and $0.1\,\mathrm{M}\,\mathrm{NaCl}$ are mixed together?
- A$0.1\,\mathrm{N}$
- B$0.25\,\mathrm{M}$
- C$0.05\,\mathrm{M}$
- D$0.2\,\mathrm{M}$
✓ Correct answer: C
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