Sr2+(aq) and hg22+(aq) complete the net ionic solution

We can use any solution containing chloride ions as NaCl solution or even dilute HCl due to mercurous Hg₂²⁺ is from group I cations which precipitated as chloride while Sr²⁺ is from group V 

Net ionic equation:

Hg₂²⁺ + 2 Cl⁻  → Hg₂Cl₂ (white precipitate)

while SrCl₂ is soluble salt

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answerspecific gravity;