SlideShare a Scribd company logo
I took the time to answer, so please rate, thanks!
Using a ICE table,
H2 + I2 <--> 2HI (Kc=2.5)
Initial/M | 0.2 | 0.4 | 0.5 |
Change | +x | +x | -2x |
Equilibrium/M |0.2+x|0.4+x|0.5-2x|
Kc=(0.5-2x)^2/(0.2+x)(0.4+x)= 2.5, we assume x~0.
so (0.5-2x)^2=2.5(0.2)(0.4)
x=0.0264 or 0.474(rejected)
The concentration for [H2], [I2] and [HI] is 0.2264 M, 0.4264 M and 0.4472 M. (Check your
required sig. figs. just in case)
Hope that helped!
Solution
I took the time to answer, so please rate, thanks!
Using a ICE table,
H2 + I2 <--> 2HI (Kc=2.5)
Initial/M | 0.2 | 0.4 | 0.5 |
Change | +x | +x | -2x |
Equilibrium/M |0.2+x|0.4+x|0.5-2x|
Kc=(0.5-2x)^2/(0.2+x)(0.4+x)= 2.5, we assume x~0.
so (0.5-2x)^2=2.5(0.2)(0.4)
x=0.0264 or 0.474(rejected)
The concentration for [H2], [I2] and [HI] is 0.2264 M, 0.4264 M and 0.4472 M. (Check your
required sig. figs. just in case)
Hope that helped!

More Related Content

More from mohammadirfan136964

Thepossible mechanism by which a 75kD nuclear protein is imported in.pdf
Thepossible mechanism by which a 75kD nuclear protein is imported in.pdfThepossible mechanism by which a 75kD nuclear protein is imported in.pdf
Thepossible mechanism by which a 75kD nuclear protein is imported in.pdf
mohammadirfan136964
 
The neurons are nervous cells which play the central role in generat.pdf
The neurons are nervous cells which play the central role in generat.pdfThe neurons are nervous cells which play the central role in generat.pdf
The neurons are nervous cells which play the central role in generat.pdf
mohammadirfan136964
 
The parts of the respiratory tract which have nonkeratinized stratif.pdf
The parts of the respiratory tract which have nonkeratinized stratif.pdfThe parts of the respiratory tract which have nonkeratinized stratif.pdf
The parts of the respiratory tract which have nonkeratinized stratif.pdf
mohammadirfan136964
 
The impact of Brexit would be visible on the financial instituations.pdf
The impact of Brexit would be visible on the financial instituations.pdfThe impact of Brexit would be visible on the financial instituations.pdf
The impact of Brexit would be visible on the financial instituations.pdf
mohammadirfan136964
 
The alkaline earth metals burn in oxygen to form the monoxide, MO wh.pdf
The alkaline earth metals burn in oxygen to form the monoxide, MO wh.pdfThe alkaline earth metals burn in oxygen to form the monoxide, MO wh.pdf
The alkaline earth metals burn in oxygen to form the monoxide, MO wh.pdf
mohammadirfan136964
 
Squid molluscCrab ArthropodsCrayfish ArthropodsPolychaete .pdf
Squid molluscCrab ArthropodsCrayfish ArthropodsPolychaete .pdfSquid molluscCrab ArthropodsCrayfish ArthropodsPolychaete .pdf
Squid molluscCrab ArthropodsCrayfish ArthropodsPolychaete .pdf
mohammadirfan136964
 
The code you written is little bit confusing and lengthy. Here is th.pdf
The code you written is little bit confusing and lengthy. Here is th.pdfThe code you written is little bit confusing and lengthy. Here is th.pdf
The code you written is little bit confusing and lengthy. Here is th.pdf
mohammadirfan136964
 
Ques-1Normala flora and microbiota of nose and mouth are non-infe.pdf
Ques-1Normala flora and microbiota of nose and mouth are non-infe.pdfQues-1Normala flora and microbiota of nose and mouth are non-infe.pdf
Ques-1Normala flora and microbiota of nose and mouth are non-infe.pdf
mohammadirfan136964
 
Solution.According to IASB framework INCOME is the one of element .pdf
Solution.According to IASB framework INCOME is the one of element .pdfSolution.According to IASB framework INCOME is the one of element .pdf
Solution.According to IASB framework INCOME is the one of element .pdf
mohammadirfan136964
 
7. Answer is A.Cytochromes are protien containing iron or heme gro.pdf
7. Answer is A.Cytochromes are protien containing iron or heme gro.pdf7. Answer is A.Cytochromes are protien containing iron or heme gro.pdf
7. Answer is A.Cytochromes are protien containing iron or heme gro.pdf
mohammadirfan136964
 
A and C. RGB analog component video uses no compression, imposes no .pdf
A and C. RGB analog component video uses no compression, imposes no .pdfA and C. RGB analog component video uses no compression, imposes no .pdf
A and C. RGB analog component video uses no compression, imposes no .pdf
mohammadirfan136964
 
Public key authentication is the most secure colution and utilizes a.pdf
Public key authentication is the most secure colution and utilizes a.pdfPublic key authentication is the most secure colution and utilizes a.pdf
Public key authentication is the most secure colution and utilizes a.pdf
mohammadirfan136964
 
Particle Charging Mechanisms in ESPParticles are charged by negat.pdf
Particle Charging Mechanisms in ESPParticles are charged by negat.pdfParticle Charging Mechanisms in ESPParticles are charged by negat.pdf
Particle Charging Mechanisms in ESPParticles are charged by negat.pdf
mohammadirfan136964
 
Option CExplanationThe word LEADING has 7 diffe.pdf
Option CExplanationThe word LEADING has 7 diffe.pdfOption CExplanationThe word LEADING has 7 diffe.pdf
Option CExplanationThe word LEADING has 7 diffe.pdf
mohammadirfan136964
 
Please follow the data There are some flag and the control charac.pdf
Please follow the data There are some flag and the control charac.pdfPlease follow the data There are some flag and the control charac.pdf
Please follow the data There are some flag and the control charac.pdf
mohammadirfan136964
 
only anhydorus LiAlH4 acts as a good reducing agent ,that is i.pdf
only anhydorus LiAlH4 acts as a good reducing agent ,that is i.pdfonly anhydorus LiAlH4 acts as a good reducing agent ,that is i.pdf
only anhydorus LiAlH4 acts as a good reducing agent ,that is i.pdf
mohammadirfan136964
 
Part 1)#include stdio.h #include stdlib.h #include pthrea.pdf
Part 1)#include stdio.h #include stdlib.h #include pthrea.pdfPart 1)#include stdio.h #include stdlib.h #include pthrea.pdf
Part 1)#include stdio.h #include stdlib.h #include pthrea.pdf
mohammadirfan136964
 
Note that there are two poles in the system. The common region of th.pdf
Note that there are two poles in the system. The common region of th.pdfNote that there are two poles in the system. The common region of th.pdf
Note that there are two poles in the system. The common region of th.pdf
mohammadirfan136964
 
Obvious first to third shell. E is proportional .pdf
                     Obvious first to third shell.  E is proportional .pdf                     Obvious first to third shell.  E is proportional .pdf
Obvious first to third shell. E is proportional .pdf
mohammadirfan136964
 
a) YES. Both are hydrocarbons and nonpolar. Like .pdf
                     a) YES. Both are hydrocarbons and nonpolar. Like .pdf                     a) YES. Both are hydrocarbons and nonpolar. Like .pdf
a) YES. Both are hydrocarbons and nonpolar. Like .pdf
mohammadirfan136964
 

More from mohammadirfan136964 (20)

Thepossible mechanism by which a 75kD nuclear protein is imported in.pdf
Thepossible mechanism by which a 75kD nuclear protein is imported in.pdfThepossible mechanism by which a 75kD nuclear protein is imported in.pdf
Thepossible mechanism by which a 75kD nuclear protein is imported in.pdf
 
The neurons are nervous cells which play the central role in generat.pdf
The neurons are nervous cells which play the central role in generat.pdfThe neurons are nervous cells which play the central role in generat.pdf
The neurons are nervous cells which play the central role in generat.pdf
 
The parts of the respiratory tract which have nonkeratinized stratif.pdf
The parts of the respiratory tract which have nonkeratinized stratif.pdfThe parts of the respiratory tract which have nonkeratinized stratif.pdf
The parts of the respiratory tract which have nonkeratinized stratif.pdf
 
The impact of Brexit would be visible on the financial instituations.pdf
The impact of Brexit would be visible on the financial instituations.pdfThe impact of Brexit would be visible on the financial instituations.pdf
The impact of Brexit would be visible on the financial instituations.pdf
 
The alkaline earth metals burn in oxygen to form the monoxide, MO wh.pdf
The alkaline earth metals burn in oxygen to form the monoxide, MO wh.pdfThe alkaline earth metals burn in oxygen to form the monoxide, MO wh.pdf
The alkaline earth metals burn in oxygen to form the monoxide, MO wh.pdf
 
Squid molluscCrab ArthropodsCrayfish ArthropodsPolychaete .pdf
Squid molluscCrab ArthropodsCrayfish ArthropodsPolychaete .pdfSquid molluscCrab ArthropodsCrayfish ArthropodsPolychaete .pdf
Squid molluscCrab ArthropodsCrayfish ArthropodsPolychaete .pdf
 
The code you written is little bit confusing and lengthy. Here is th.pdf
The code you written is little bit confusing and lengthy. Here is th.pdfThe code you written is little bit confusing and lengthy. Here is th.pdf
The code you written is little bit confusing and lengthy. Here is th.pdf
 
Ques-1Normala flora and microbiota of nose and mouth are non-infe.pdf
Ques-1Normala flora and microbiota of nose and mouth are non-infe.pdfQues-1Normala flora and microbiota of nose and mouth are non-infe.pdf
Ques-1Normala flora and microbiota of nose and mouth are non-infe.pdf
 
Solution.According to IASB framework INCOME is the one of element .pdf
Solution.According to IASB framework INCOME is the one of element .pdfSolution.According to IASB framework INCOME is the one of element .pdf
Solution.According to IASB framework INCOME is the one of element .pdf
 
7. Answer is A.Cytochromes are protien containing iron or heme gro.pdf
7. Answer is A.Cytochromes are protien containing iron or heme gro.pdf7. Answer is A.Cytochromes are protien containing iron or heme gro.pdf
7. Answer is A.Cytochromes are protien containing iron or heme gro.pdf
 
A and C. RGB analog component video uses no compression, imposes no .pdf
A and C. RGB analog component video uses no compression, imposes no .pdfA and C. RGB analog component video uses no compression, imposes no .pdf
A and C. RGB analog component video uses no compression, imposes no .pdf
 
Public key authentication is the most secure colution and utilizes a.pdf
Public key authentication is the most secure colution and utilizes a.pdfPublic key authentication is the most secure colution and utilizes a.pdf
Public key authentication is the most secure colution and utilizes a.pdf
 
Particle Charging Mechanisms in ESPParticles are charged by negat.pdf
Particle Charging Mechanisms in ESPParticles are charged by negat.pdfParticle Charging Mechanisms in ESPParticles are charged by negat.pdf
Particle Charging Mechanisms in ESPParticles are charged by negat.pdf
 
Option CExplanationThe word LEADING has 7 diffe.pdf
Option CExplanationThe word LEADING has 7 diffe.pdfOption CExplanationThe word LEADING has 7 diffe.pdf
Option CExplanationThe word LEADING has 7 diffe.pdf
 
Please follow the data There are some flag and the control charac.pdf
Please follow the data There are some flag and the control charac.pdfPlease follow the data There are some flag and the control charac.pdf
Please follow the data There are some flag and the control charac.pdf
 
only anhydorus LiAlH4 acts as a good reducing agent ,that is i.pdf
only anhydorus LiAlH4 acts as a good reducing agent ,that is i.pdfonly anhydorus LiAlH4 acts as a good reducing agent ,that is i.pdf
only anhydorus LiAlH4 acts as a good reducing agent ,that is i.pdf
 
Part 1)#include stdio.h #include stdlib.h #include pthrea.pdf
Part 1)#include stdio.h #include stdlib.h #include pthrea.pdfPart 1)#include stdio.h #include stdlib.h #include pthrea.pdf
Part 1)#include stdio.h #include stdlib.h #include pthrea.pdf
 
Note that there are two poles in the system. The common region of th.pdf
Note that there are two poles in the system. The common region of th.pdfNote that there are two poles in the system. The common region of th.pdf
Note that there are two poles in the system. The common region of th.pdf
 
Obvious first to third shell. E is proportional .pdf
                     Obvious first to third shell.  E is proportional .pdf                     Obvious first to third shell.  E is proportional .pdf
Obvious first to third shell. E is proportional .pdf
 
a) YES. Both are hydrocarbons and nonpolar. Like .pdf
                     a) YES. Both are hydrocarbons and nonpolar. Like .pdf                     a) YES. Both are hydrocarbons and nonpolar. Like .pdf
a) YES. Both are hydrocarbons and nonpolar. Like .pdf
 

Recently uploaded

Unit 8 - Information and Communication Technology (Paper I).pdf
Unit 8 - Information and Communication Technology (Paper I).pdfUnit 8 - Information and Communication Technology (Paper I).pdf
Unit 8 - Information and Communication Technology (Paper I).pdf
Thiyagu K
 
The Challenger.pdf DNHS Official Publication
The Challenger.pdf DNHS Official PublicationThe Challenger.pdf DNHS Official Publication
The Challenger.pdf DNHS Official Publication
Delapenabediema
 
S1-Introduction-Biopesticides in ICM.pptx
S1-Introduction-Biopesticides in ICM.pptxS1-Introduction-Biopesticides in ICM.pptx
S1-Introduction-Biopesticides in ICM.pptx
tarandeep35
 
Home assignment II on Spectroscopy 2024 Answers.pdf
Home assignment II on Spectroscopy 2024 Answers.pdfHome assignment II on Spectroscopy 2024 Answers.pdf
Home assignment II on Spectroscopy 2024 Answers.pdf
Tamralipta Mahavidyalaya
 
Lapbook sobre os Regimes Totalitários.pdf
Lapbook sobre os Regimes Totalitários.pdfLapbook sobre os Regimes Totalitários.pdf
Lapbook sobre os Regimes Totalitários.pdf
Jean Carlos Nunes Paixão
 
Overview on Edible Vaccine: Pros & Cons with Mechanism
Overview on Edible Vaccine: Pros & Cons with MechanismOverview on Edible Vaccine: Pros & Cons with Mechanism
Overview on Edible Vaccine: Pros & Cons with Mechanism
DeeptiGupta154
 
Thesis Statement for students diagnonsed withADHD.ppt
Thesis Statement for students diagnonsed withADHD.pptThesis Statement for students diagnonsed withADHD.ppt
Thesis Statement for students diagnonsed withADHD.ppt
EverAndrsGuerraGuerr
 
The French Revolution Class 9 Study Material pdf free download
The French Revolution Class 9 Study Material pdf free downloadThe French Revolution Class 9 Study Material pdf free download
The French Revolution Class 9 Study Material pdf free download
Vivekanand Anglo Vedic Academy
 
June 3, 2024 Anti-Semitism Letter Sent to MIT President Kornbluth and MIT Cor...
June 3, 2024 Anti-Semitism Letter Sent to MIT President Kornbluth and MIT Cor...June 3, 2024 Anti-Semitism Letter Sent to MIT President Kornbluth and MIT Cor...
June 3, 2024 Anti-Semitism Letter Sent to MIT President Kornbluth and MIT Cor...
Levi Shapiro
 
Acetabularia Information For Class 9 .docx
Acetabularia Information For Class 9  .docxAcetabularia Information For Class 9  .docx
Acetabularia Information For Class 9 .docx
vaibhavrinwa19
 
The approach at University of Liverpool.pptx
The approach at University of Liverpool.pptxThe approach at University of Liverpool.pptx
The approach at University of Liverpool.pptx
Jisc
 
BÀI TẬP BỔ TRỢ TIẾNG ANH GLOBAL SUCCESS LỚP 3 - CẢ NĂM (CÓ FILE NGHE VÀ ĐÁP Á...
BÀI TẬP BỔ TRỢ TIẾNG ANH GLOBAL SUCCESS LỚP 3 - CẢ NĂM (CÓ FILE NGHE VÀ ĐÁP Á...BÀI TẬP BỔ TRỢ TIẾNG ANH GLOBAL SUCCESS LỚP 3 - CẢ NĂM (CÓ FILE NGHE VÀ ĐÁP Á...
BÀI TẬP BỔ TRỢ TIẾNG ANH GLOBAL SUCCESS LỚP 3 - CẢ NĂM (CÓ FILE NGHE VÀ ĐÁP Á...
Nguyen Thanh Tu Collection
 
Introduction to AI for Nonprofits with Tapp Network
Introduction to AI for Nonprofits with Tapp NetworkIntroduction to AI for Nonprofits with Tapp Network
Introduction to AI for Nonprofits with Tapp Network
TechSoup
 
STRAND 3 HYGIENIC PRACTICES.pptx GRADE 7 CBC
STRAND 3 HYGIENIC PRACTICES.pptx GRADE 7 CBCSTRAND 3 HYGIENIC PRACTICES.pptx GRADE 7 CBC
STRAND 3 HYGIENIC PRACTICES.pptx GRADE 7 CBC
kimdan468
 
Normal Labour/ Stages of Labour/ Mechanism of Labour
Normal Labour/ Stages of Labour/ Mechanism of LabourNormal Labour/ Stages of Labour/ Mechanism of Labour
Normal Labour/ Stages of Labour/ Mechanism of Labour
Wasim Ak
 
Digital Artifact 2 - Investigating Pavilion Designs
Digital Artifact 2 - Investigating Pavilion DesignsDigital Artifact 2 - Investigating Pavilion Designs
Digital Artifact 2 - Investigating Pavilion Designs
chanes7
 
The basics of sentences session 5pptx.pptx
The basics of sentences session 5pptx.pptxThe basics of sentences session 5pptx.pptx
The basics of sentences session 5pptx.pptx
heathfieldcps1
 
Biological Screening of Herbal Drugs in detailed.
Biological Screening of Herbal Drugs in detailed.Biological Screening of Herbal Drugs in detailed.
Biological Screening of Herbal Drugs in detailed.
Ashokrao Mane college of Pharmacy Peth-Vadgaon
 
Azure Interview Questions and Answers PDF By ScholarHat
Azure Interview Questions and Answers PDF By ScholarHatAzure Interview Questions and Answers PDF By ScholarHat
Azure Interview Questions and Answers PDF By ScholarHat
Scholarhat
 
Digital Tools and AI for Teaching Learning and Research
Digital Tools and AI for Teaching Learning and ResearchDigital Tools and AI for Teaching Learning and Research
Digital Tools and AI for Teaching Learning and Research
Vikramjit Singh
 

Recently uploaded (20)

Unit 8 - Information and Communication Technology (Paper I).pdf
Unit 8 - Information and Communication Technology (Paper I).pdfUnit 8 - Information and Communication Technology (Paper I).pdf
Unit 8 - Information and Communication Technology (Paper I).pdf
 
The Challenger.pdf DNHS Official Publication
The Challenger.pdf DNHS Official PublicationThe Challenger.pdf DNHS Official Publication
The Challenger.pdf DNHS Official Publication
 
S1-Introduction-Biopesticides in ICM.pptx
S1-Introduction-Biopesticides in ICM.pptxS1-Introduction-Biopesticides in ICM.pptx
S1-Introduction-Biopesticides in ICM.pptx
 
Home assignment II on Spectroscopy 2024 Answers.pdf
Home assignment II on Spectroscopy 2024 Answers.pdfHome assignment II on Spectroscopy 2024 Answers.pdf
Home assignment II on Spectroscopy 2024 Answers.pdf
 
Lapbook sobre os Regimes Totalitários.pdf
Lapbook sobre os Regimes Totalitários.pdfLapbook sobre os Regimes Totalitários.pdf
Lapbook sobre os Regimes Totalitários.pdf
 
Overview on Edible Vaccine: Pros & Cons with Mechanism
Overview on Edible Vaccine: Pros & Cons with MechanismOverview on Edible Vaccine: Pros & Cons with Mechanism
Overview on Edible Vaccine: Pros & Cons with Mechanism
 
Thesis Statement for students diagnonsed withADHD.ppt
Thesis Statement for students diagnonsed withADHD.pptThesis Statement for students diagnonsed withADHD.ppt
Thesis Statement for students diagnonsed withADHD.ppt
 
The French Revolution Class 9 Study Material pdf free download
The French Revolution Class 9 Study Material pdf free downloadThe French Revolution Class 9 Study Material pdf free download
The French Revolution Class 9 Study Material pdf free download
 
June 3, 2024 Anti-Semitism Letter Sent to MIT President Kornbluth and MIT Cor...
June 3, 2024 Anti-Semitism Letter Sent to MIT President Kornbluth and MIT Cor...June 3, 2024 Anti-Semitism Letter Sent to MIT President Kornbluth and MIT Cor...
June 3, 2024 Anti-Semitism Letter Sent to MIT President Kornbluth and MIT Cor...
 
Acetabularia Information For Class 9 .docx
Acetabularia Information For Class 9  .docxAcetabularia Information For Class 9  .docx
Acetabularia Information For Class 9 .docx
 
The approach at University of Liverpool.pptx
The approach at University of Liverpool.pptxThe approach at University of Liverpool.pptx
The approach at University of Liverpool.pptx
 
BÀI TẬP BỔ TRỢ TIẾNG ANH GLOBAL SUCCESS LỚP 3 - CẢ NĂM (CÓ FILE NGHE VÀ ĐÁP Á...
BÀI TẬP BỔ TRỢ TIẾNG ANH GLOBAL SUCCESS LỚP 3 - CẢ NĂM (CÓ FILE NGHE VÀ ĐÁP Á...BÀI TẬP BỔ TRỢ TIẾNG ANH GLOBAL SUCCESS LỚP 3 - CẢ NĂM (CÓ FILE NGHE VÀ ĐÁP Á...
BÀI TẬP BỔ TRỢ TIẾNG ANH GLOBAL SUCCESS LỚP 3 - CẢ NĂM (CÓ FILE NGHE VÀ ĐÁP Á...
 
Introduction to AI for Nonprofits with Tapp Network
Introduction to AI for Nonprofits with Tapp NetworkIntroduction to AI for Nonprofits with Tapp Network
Introduction to AI for Nonprofits with Tapp Network
 
STRAND 3 HYGIENIC PRACTICES.pptx GRADE 7 CBC
STRAND 3 HYGIENIC PRACTICES.pptx GRADE 7 CBCSTRAND 3 HYGIENIC PRACTICES.pptx GRADE 7 CBC
STRAND 3 HYGIENIC PRACTICES.pptx GRADE 7 CBC
 
Normal Labour/ Stages of Labour/ Mechanism of Labour
Normal Labour/ Stages of Labour/ Mechanism of LabourNormal Labour/ Stages of Labour/ Mechanism of Labour
Normal Labour/ Stages of Labour/ Mechanism of Labour
 
Digital Artifact 2 - Investigating Pavilion Designs
Digital Artifact 2 - Investigating Pavilion DesignsDigital Artifact 2 - Investigating Pavilion Designs
Digital Artifact 2 - Investigating Pavilion Designs
 
The basics of sentences session 5pptx.pptx
The basics of sentences session 5pptx.pptxThe basics of sentences session 5pptx.pptx
The basics of sentences session 5pptx.pptx
 
Biological Screening of Herbal Drugs in detailed.
Biological Screening of Herbal Drugs in detailed.Biological Screening of Herbal Drugs in detailed.
Biological Screening of Herbal Drugs in detailed.
 
Azure Interview Questions and Answers PDF By ScholarHat
Azure Interview Questions and Answers PDF By ScholarHatAzure Interview Questions and Answers PDF By ScholarHat
Azure Interview Questions and Answers PDF By ScholarHat
 
Digital Tools and AI for Teaching Learning and Research
Digital Tools and AI for Teaching Learning and ResearchDigital Tools and AI for Teaching Learning and Research
Digital Tools and AI for Teaching Learning and Research
 

I took the time to answer, so please rate, thanks!Using a ICE tabl.pdf

  • 1. I took the time to answer, so please rate, thanks! Using a ICE table, H2 + I2 <--> 2HI (Kc=2.5) Initial/M | 0.2 | 0.4 | 0.5 | Change | +x | +x | -2x | Equilibrium/M |0.2+x|0.4+x|0.5-2x| Kc=(0.5-2x)^2/(0.2+x)(0.4+x)= 2.5, we assume x~0. so (0.5-2x)^2=2.5(0.2)(0.4) x=0.0264 or 0.474(rejected) The concentration for [H2], [I2] and [HI] is 0.2264 M, 0.4264 M and 0.4472 M. (Check your required sig. figs. just in case) Hope that helped! Solution I took the time to answer, so please rate, thanks! Using a ICE table, H2 + I2 <--> 2HI (Kc=2.5) Initial/M | 0.2 | 0.4 | 0.5 | Change | +x | +x | -2x | Equilibrium/M |0.2+x|0.4+x|0.5-2x| Kc=(0.5-2x)^2/(0.2+x)(0.4+x)= 2.5, we assume x~0. so (0.5-2x)^2=2.5(0.2)(0.4) x=0.0264 or 0.474(rejected) The concentration for [H2], [I2] and [HI] is 0.2264 M, 0.4264 M and 0.4472 M. (Check your required sig. figs. just in case) Hope that helped!