Balanced chemical equation and a net ionic equation - HELP!?
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Answer:
2 AgNO3 + Na2CrO4 = Ag2CrO4 + 2 NaNO3 All of the above are soluble except Ag2CrO4 , therefore: 2 AgNO3(aq) + Na2CrO4(aq) = Ag2CrO4(s) + 2 NaNO3(aq) The aqueous, (aq), are soluble and produce ions while the solid, (s) are insoluble and produce no ions: 2 Ag+(aq) + 2 NO3-(aq) + 2 Na+(aq) + CrO4 2-(aq) = Ag2CrO4(s) + 2 Na+(aq) + 2 NO3-(aq) If we cancel out the species that occur on both sides, left and right, we are left with: 2 Ag+(aq) + CrO4 2-(aq) = Ag2CrO4(s) and this is the net ionic equation While Na+ and NO3- are just spectator ions. You need to know whether a compound is soluble or insoluble to resolve such questions so solubility rules or tables are handy for this,
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Other answers
2 AgNO3 + Na2CrO4 = Ag2CrO4 + 2 NaNO3 All of the above are soluble except Ag2CrO4 , therefore: 2 AgNO3(aq) + Na2CrO4(aq) = Ag2CrO4(s) + 2 NaNO3(aq) The aqueous, (aq), are soluble and produce ions while the solid, (s) are insoluble and produce no ions: 2 Ag+(aq) + 2 NO3-(aq) + 2 Na+(aq) + CrO4 2-(aq) = Ag2CrO4(s) + 2 Na+(aq) + 2 NO3-(aq) If we cancel out the species that occur on both sides, left and right, we are left with: 2 Ag+(aq) + CrO4 2-(aq) = Ag2CrO4(s) and this is the net ionic equation While Na+ and NO3- are just spectator ions. You need to know whether a compound is soluble or insoluble to resolve such questions so solubility rules or tables are handy for this,
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