Question

Does a reaction occur when aqueous solutions of sodium sulfide and chromium(III) iodide are combined?

Does a reaction occur when aqueous solutions of zinc bromide and lead(II) nitrate are combined?

Does a reaction occur when aqueous solutions of cobalt(II) bromide and ammonium carbonate are combined?

Answer 1

1.Both sodium sulphide and Chromium iodide are soluble in water.

Sodium sulfide reacts with Chromium iodide to from Sodium iodide and chromium sulfide.

3Na₂S + 2CrI₃ = 6NaI + Cr₂S₃

2. Both Lead Nitrate and Zinc bromide are soluble in water.

Zinc Bromide reacts with lead nitrate to from Zinc Nitrate and Lead bromide

ZnBr₂ + Pb(NO₃)₂$\rightarrow$ Zn(NO₃)₂  + PbBr_2(ppt.)

3. Ammonium carbonate is soluble in water.

Cobalt Bromide is also soluble in water.

(NH₄)₂CO₃ + CoBr₂$\rightarrow$ 2NH₄Br + CoCO₃

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