Chemistry · Qualitative Inorganic Analysis
In the qualitative analysis of group III cations (like iron), ammonium chloride (NH4Cl) is added before adding ammonium hydroxide (NH4OH) in order to:
- 1increase the concentration of NH4+ ions
- 2increase the concentration of Cl- ions
- 3decrease the concentration of OH- ions✓
- 4prevent interference by phosphate ions
Correct answer
decrease the concentration of OH- ions
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