CHM 1025C Part A: Qualitative Analysis – Cation Pre-Lab Report

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Write and balance the Ion Exchange Reactions for the following steps (Except 7 & 9) in Part A:

Step #3:

Lead II Nitrate (aq) + Hydrochloric Acid (aq) →

Silver Nitrate (aq) + Hydrochloric Acid (aq) →

Mercury I Nitrate (aq) + Hydrochloric Acid (aq) →

Step #6:

Potassium chromate (aq) + Lead Chloride (aq) →

Step#7: REDOX reaction forming black Hg solid particle and white ppt on filter paper

Hg₂Cl₂ (s) + 2 NH₃ (aq) → Hg (l) + HgNH₂Cl (s) + NH₄¹⁺(aq) + Cl^1- (aq)

^{White black white}

Step#9: Soluble Complex Ion Formation

AgCl (s) + 2 NH₃ (aq) → Ag(NH₃)₂¹⁺(aq) + Cl^1-(aq)

Step#11

Calcium Nitrate (aq) + Ammonium Oxalate [(NH₄)₂C₂O₄] (aq) →