Based on the following data, is this iron thiocyanate reaction endothermic or exothermic?:  Fe3+(aq)    +    SCN−(aq)   ⇌   FeSCN2+(aq) [colorless]         [colorless]         [blood-red color] After being submreged in a hot water bath, the solution was colorless. After being submerged in an ice bath, the solution turned dark red in color.

Chemistry: The Molecular Science
5th Edition
ISBN:9781285199047
Author:John W. Moore, Conrad L. Stanitski
Publisher:John W. Moore, Conrad L. Stanitski
Chapter12: Chemical Equilibrium
Section: Chapter Questions
Problem 12.BCP
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Based on the following data, is this iron thiocyanate reaction endothermic or exothermic?:

 Fe3+(aq)    +    SCN−(aq)   ⇌   FeSCN2+(aq)

[colorless]         [colorless]         [blood-red color]

After being submreged in a hot water bath, the solution was colorless.

After being submerged in an ice bath, the solution turned dark red in color. 

Fe+ (aq) + SCN (aq) =
FESCN?+ (aq)
blood-red color
Table view
List view
Table 1. Equilibrium response observations
Color observation
Reaction response
Test tube 1 - Control
light red
Choose...
Towards reactants
Test tube 2 - Add KSCN (aq)
slightly darker red
Choose...
Test tube 3 - Add Fe(NO3)(aq)
darker red
Towards reactants
Choose...
Towards products
Test tube 4 - Add NaF(s)
nо color
Choose...
Towards products
Test tube 5 - Hot water bath
almost colorless
Choose...
Towards reactants -
Test tube 6 - Ice bath
slightly darker red
Transcribed Image Text:Fe+ (aq) + SCN (aq) = FESCN?+ (aq) blood-red color Table view List view Table 1. Equilibrium response observations Color observation Reaction response Test tube 1 - Control light red Choose... Towards reactants Test tube 2 - Add KSCN (aq) slightly darker red Choose... Test tube 3 - Add Fe(NO3)(aq) darker red Towards reactants Choose... Towards products Test tube 4 - Add NaF(s) nо color Choose... Towards products Test tube 5 - Hot water bath almost colorless Choose... Towards reactants - Test tube 6 - Ice bath slightly darker red
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