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The color change observed when potassium thiocyanate (KSCN) is added to a solution containing Fe3+ ions is:
- a)Colorless to reddish-brown
- b)Reddish-brown to colorless
- c)Blue to yellow
- d)Yellow to blue
Correct answer is option 'A'. Can you explain this answer?
Most Upvoted Answer
The color change observed when potassium thiocyanate (KSCN) is added t...
When potassium thiocyanate (KSCN) is added to a solution containing Fe3+ ions, a deep red color is observed. This color change occurs due to the formation of a complex ion called iron(III) thiocyanate (Fe(SCN)3), which has a reddish-brown color.
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The color change observed when potassium thiocyanate (KSCN) is added t...
Color Change in the Reaction between Potassium Thiocyanate (KSCN) and Fe3+ Ions
Explanation:
When potassium thiocyanate (KSCN) is added to a solution containing Fe3+ ions, a color change occurs. The initial color of the solution is colorless, and after the addition of KSCN, it turns reddish-brown.
Overview of the Reaction:
The reaction between potassium thiocyanate and Fe3+ ions involves the formation of a complex ion called iron(III) thiocyanate. This complex ion has a reddish-brown color, which accounts for the observed color change.
Key Points:
- Initial solution color: Colorless
- Final solution color: Reddish-brown
- Color change direction: Colorless to reddish-brown
Explanation of the Reaction:
1. Potassium thiocyanate (KSCN) dissociates in water to form potassium ions (K+) and thiocyanate ions (SCN-).
- KSCN(aq) ⟶ K+(aq) + SCN-(aq)
2. Fe3+ ions from another solution are present in the solution. These ions are typically in the form of a salt, such as iron(III) chloride (FeCl3), which dissociates in water to release Fe3+ ions.
- FeCl3(aq) ⟶ Fe3+(aq) + 3Cl-(aq)
3. The thiocyanate ions (SCN-) react with the Fe3+ ions to form the iron(III) thiocyanate complex ion.
- Fe3+(aq) + 3SCN-(aq) ⟶ [Fe(SCN)3](aq)
4. The iron(III) thiocyanate complex ion is responsible for the reddish-brown color observed in the final solution.
Conclusion:
In the reaction between potassium thiocyanate (KSCN) and Fe3+ ions, the color change observed is from colorless to reddish-brown. The formation of the iron(III) thiocyanate complex ion is responsible for this color change.
Explanation:
When potassium thiocyanate (KSCN) is added to a solution containing Fe3+ ions, a color change occurs. The initial color of the solution is colorless, and after the addition of KSCN, it turns reddish-brown.
Overview of the Reaction:
The reaction between potassium thiocyanate and Fe3+ ions involves the formation of a complex ion called iron(III) thiocyanate. This complex ion has a reddish-brown color, which accounts for the observed color change.
Key Points:
- Initial solution color: Colorless
- Final solution color: Reddish-brown
- Color change direction: Colorless to reddish-brown
Explanation of the Reaction:
1. Potassium thiocyanate (KSCN) dissociates in water to form potassium ions (K+) and thiocyanate ions (SCN-).
- KSCN(aq) ⟶ K+(aq) + SCN-(aq)
2. Fe3+ ions from another solution are present in the solution. These ions are typically in the form of a salt, such as iron(III) chloride (FeCl3), which dissociates in water to release Fe3+ ions.
- FeCl3(aq) ⟶ Fe3+(aq) + 3Cl-(aq)
3. The thiocyanate ions (SCN-) react with the Fe3+ ions to form the iron(III) thiocyanate complex ion.
- Fe3+(aq) + 3SCN-(aq) ⟶ [Fe(SCN)3](aq)
4. The iron(III) thiocyanate complex ion is responsible for the reddish-brown color observed in the final solution.
Conclusion:
In the reaction between potassium thiocyanate (KSCN) and Fe3+ ions, the color change observed is from colorless to reddish-brown. The formation of the iron(III) thiocyanate complex ion is responsible for this color change.
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The color change observed when potassium thiocyanate (KSCN) is added to a solution containing Fe3+ ions is:a)Colorless to reddish-brownb)Reddish-brown to colorlessc)Blue to yellowd)Yellow to blueCorrect answer is option 'A'. Can you explain this answer? for JAMB 2025 is part of JAMB preparation. The Question and answers have been prepared according to the JAMB exam syllabus. Information about The color change observed when potassium thiocyanate (KSCN) is added to a solution containing Fe3+ ions is:a)Colorless to reddish-brownb)Reddish-brown to colorlessc)Blue to yellowd)Yellow to blueCorrect answer is option 'A'. Can you explain this answer? covers all topics & solutions for JAMB 2025 Exam. Find important definitions, questions, meanings, examples, exercises and tests below for The color change observed when potassium thiocyanate (KSCN) is added to a solution containing Fe3+ ions is:a)Colorless to reddish-brownb)Reddish-brown to colorlessc)Blue to yellowd)Yellow to blueCorrect answer is option 'A'. Can you explain this answer?.
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