Write the ionic equation for the above reactions and identify what type of react
ID: 572132 • Letter: W
Question
Write the ionic equation for the above reactions and identify what type of reactions:
Could someone help me to answer the below chard? Some of the answers i wrote was wrong.
Reaction
Net Ionic Equation(s)
1 Chromium(III) & NH3
Type
Precipitation
Cr3+(aq) + 3NH3(aq) + 3H2O(l) <==> Cr(OH)3(s) + 3NH4+(aq)
2 Copper(II) & K2CrO4-
Type
Precipitation
Cu2+(aq)+K2CrO4(aq) <==> CuCrO4(s)+2K+(aq)
3 Iron (III) & K2CrO4
Type
Precipitation
2Fe3+(aq)+ 3K2CrO4(aq) <==> Fe2(CrO4)3(s) + 6 K+(aq)
4 Iron (II) & K2CrO4
Type
Precipitation
Fe2+(aq)+ K2CrO4(aq) <==> FeCrO4(s) + 2K+(aq)
5 Nickle(II) & KI
Type
Redox
2Ni2+ + 5KI <==> 2NiI(aq)+KI3(aq)+4K+(aq)
Reaction
Net Ionic Equation(s)
1 Chromium(III) & NH3
Type
Precipitation
Cr3+(aq) + 3NH3(aq) + 3H2O(l) <==> Cr(OH)3(s) + 3NH4+(aq)
2 Copper(II) & K2CrO4-
Type
Precipitation
Cu2+(aq)+K2CrO4(aq) <==> CuCrO4(s)+2K+(aq)
3 Iron (III) & K2CrO4
Type
Precipitation
2Fe3+(aq)+ 3K2CrO4(aq) <==> Fe2(CrO4)3(s) + 6 K+(aq)
4 Iron (II) & K2CrO4
Type
Precipitation
Fe2+(aq)+ K2CrO4(aq) <==> FeCrO4(s) + 2K+(aq)
5 Nickle(II) & KI
Type
Redox
2Ni2+ + 5KI <==> 2NiI(aq)+KI3(aq)+4K+(aq)
Explanation / Answer
1) The type of reaction is Precipitation because Ammonia reacts with chromium(III) ion to precipitate grey-green chromium(III) hydroxide as follows:
Cr3+(aq) + 3NH3(aq) + 3H2O(l) <==> Cr(OH)3(s) + 3NH4+(aq)
PS: your answer is correct!
2) The type of reaction is Precipitation because CuCrO4 will precipitate out of solution, according to the solubility rules, reaction is as follows:
Cu2+(aq)+K2CrO4(aq) <==> CuCrO4(s)+2K+(aq)
PS: your answer is correct!
3) The type of reaction is Precipitation because Fe2(CrO4)3 will precipitate out of solution, according to the solubility rules, reaction is as follows:
2Fe3+(aq)+ 3K2CrO4(aq) <==> Fe2(CrO4)3(s) + 6 K+(aq)
PS: your answer is correct!
4) The type of reaction is Precipitation because FeCrO4will precipitate out of solution, according to the solubility rules, reaction is as follows:
Fe2+(aq)+ K2CrO4(aq) <==> FeCrO4(s) + 2 K+(aq)
PS: your answer is correct!
5) Type of reaction is Redox because since both are reducing agents but one of them is more reducing than other, So one of them would oxidise and other would reduce as follows:
2Ni2+ + 5KI <==> 2NiI(aq)+KI3(aq)+4K+(aq)
PS: your answer is correct!
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