Problem: Complete and balance each of the following equations for gas-evolution reactions.HBr(aq) + NiS(s) →

FREE Expert Solution
  • Reaction appears to be a double displacement reaction where counterions are being switched
  • So HBr and NiS will dissociate as H+, Br-, Ni2+ and S2-
  • This will produce H2(from H+ and S2-) and NiBr2 (from Ni2+ and Br-).
  • H2(hydrogen sulfide) is present as gas in standard conditions while NiBr2 will appear as aqueous species (soluble acc. to the solubility rules) 
  • All bromides (Br- ) are soluble except AgBr, Hg2Br2, HgBr2, and PbBr2 which are insoluble
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Problem Details

Complete and balance each of the following equations for gas-evolution reactions.

HBr(aq) + NiS(s) →

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