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1. Initial solutions: a) What ions are present in the KSCN(aq) solution? b) What ions are present in the Fe(NO:)s(aq) solution? e) What is the net ionic equation for the reaction between KSCN(aq) and Fe(NO:)e(aq)?

1. Initial solutions: a) What ions are present in the KSCN(aq) solution? b) What ions are present in the Fe(NO:)s(aq) solution? e) What is the net ionic equation for the reaction between KSCN(aq) and Fe(NO:)e(aq)?

Chemistry
Chemistry
10th Edition
ISBN:9781305957404
Author:Steven S. Zumdahl, Susan A. Zumdahl, Donald J. DeCoste
Publisher:Steven S. Zumdahl, Susan A. Zumdahl, Donald J. DeCoste
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This is the lab with my data sheet and please answer all of them. Thank you

 

My data to support answers for questions.

The equilibrium is Fe3+ + SCN- <--> [FeSCN]2+. The Fe3+ is a pale yellow colour and the complex ion product is red.

Stresses:
Add KSCN - turned deep red
Add Fe(NO3)3 - turned deep red
Add Na2CO3 - turned yellow/colourless
Add NaOH - turned yellow/colourless
Add NH3 - turned yellow/colourless
Heat - turned lighter orange colour
Cold - turned darker orange colour

1. Initial solutions: a) What ions are present in the KSCN(aq) solution? b) What ions are present in the Fe(NO:):(aq) solution? e) What is the net ionic equation for the reaction between KSCN(aq) and Fe(NO:):(aq)? d) What species is responsible for the observed colour change when KSCN(aq) and Fe(NO:)a(aq) are mixed? e) What can be concluded about the system based on your -1l minute observation of the mixture? Addition of KSCN(s) to test tube 2: a) What does the addition of the solid do to the [SCN(aq)]? b) What can you infer about the system from the colour change of the solution? c) How can this be possible if no additional Fe*(aq) has been introduced? Addition of Fe(NO:)a(aq) to test tube #3: a) What does the addition of the solution do to the [Fe*"(aq)]? b) What can you infer about the system from the colour change of the solution? c) How can this be possible if no additional SCN(aq) has been introduceď? Addition of Na:CO:(s) to test tube #4: a) As a result of the colour change, what can be concluded about the [FESCN"(aq)]? Explain. b) Explain why the addition of Na:CO:(aq) affects the [FESCN*(aq)] as indicated in (a). Use a chemical reaction in your explanation. Addition of NaOH(aq) test tube #5: a) As a result of the colour change, what can be concluded about the [FeSCN*“(aq)? Explain. b) Explain why the addition of NaOH(aq) affects the [FESCN*"(aq)] as indicated in (a). Use a chemical reaction in your explanation. Addition of NH-(aq) to test tube #6 and wait 5 minutes: a) As a result of the colour change, what can be concluded about the [FESCN"(aq)]? Explain.
Transcribed Image Text:1. Initial solutions: a) What ions are present in the KSCN(aq) solution? b) What ions are present in the Fe(NO:):(aq) solution? e) What is the net ionic equation for the reaction between KSCN(aq) and Fe(NO:):(aq)? d) What species is responsible for the observed colour change when KSCN(aq) and Fe(NO:)a(aq) are mixed? e) What can be concluded about the system based on your -1l minute observation of the mixture? Addition of KSCN(s) to test tube 2: a) What does the addition of the solid do to the [SCN(aq)]? b) What can you infer about the system from the colour change of the solution? c) How can this be possible if no additional Fe*(aq) has been introduced? Addition of Fe(NO:)a(aq) to test tube #3: a) What does the addition of the solution do to the [Fe*"(aq)]? b) What can you infer about the system from the colour change of the solution? c) How can this be possible if no additional SCN(aq) has been introduceď? Addition of Na:CO:(s) to test tube #4: a) As a result of the colour change, what can be concluded about the [FESCN"(aq)]? Explain. b) Explain why the addition of Na:CO:(aq) affects the [FESCN*(aq)] as indicated in (a). Use a chemical reaction in your explanation. Addition of NaOH(aq) test tube #5: a) As a result of the colour change, what can be concluded about the [FeSCN*“(aq)? Explain. b) Explain why the addition of NaOH(aq) affects the [FESCN*"(aq)] as indicated in (a). Use a chemical reaction in your explanation. Addition of NH-(aq) to test tube #6 and wait 5 minutes: a) As a result of the colour change, what can be concluded about the [FESCN"(aq)]? Explain.
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