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(a) identify the most acidic compound from the following: CH3 – CH3, CH2 = CH2 and CH ≡ CH, and justify your answer. Draw overlap of the orbitals to show bonding in the most acidic compound using the concept of hybridization.
(b) Write a balanced chemical equation to represent acid-base reaction of orthoboric acid in water.
Addition of ethylene glycol to aqueous orthoboric acid enhances its acidity. Explain the above statement using appropriate chemical equation.
(b) Write a balanced chemical equation to represent acid-base reaction of orthoboric acid in water.
Addition of ethylene glycol to aqueous orthoboric acid enhances its acidity. Explain the above statement using appropriate chemical equation.
Correct answer is '(a) CH ≡ CH is the most acidic compound among ethane and ethylene.(b) orthoboric acid in water:'. Can you explain this answer?
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(a) identify the most acidic compound from the following: CH3 CH3, CH...
(a) CH ≡ CH is the most acidic compound among ethane and ethylene.
- The acidity of H–A increases as the percent S-character of the A– increases.
- The higher the percent S-character of the hybrid orbital, the closer the lone pair is held to the nucleus, and the more stable the conjugate base.
Acetylene → H - C ≡ C - H
(b) orthoboric acid in water:
Addition of ethylene glycol of aqueous orthoboric acid forms chelated complex compound and generates H+ ions.
Most Upvoted Answer
(a) identify the most acidic compound from the following: CH3 CH3, CH...
(a) Most acidic compound:
To determine the most acidic compound among CH3CH3, CH2=CH2, and CH≡CH, we need to look at their respective conjugate bases. The compound with the most stable conjugate base will be the most acidic.
- CH3CH3: The conjugate base of CH3CH3 is CH3CH2-, which is stabilized by inductive effects due to the presence of two alkyl groups. However, it does not have any resonance stabilization.
- CH2=CH2: The conjugate base of CH2=CH2 is CH2=CH-, which is stabilized by both inductive effects and resonance. The pi bond can delocalize the negative charge, making the conjugate base more stable.
- CH≡CH: The conjugate base of CH≡CH is CH≡C-, which is stabilized by inductive effects, resonance, and also by the sp hybridization of the carbon atom. The sp hybridization allows for greater overlap of the carbon's p orbital with the p orbital of the neighboring carbon, making the conjugate base even more stable.
Therefore, the most acidic compound among these is CH≡CH, as it has the most stable conjugate base.
To show the bonding in CH≡CH, we can draw the overlap of orbitals using the concept of hybridization:
H
/
H - C ≡ C - H
\
H
In this structure, the carbon atoms are sp hybridized, meaning they have one s orbital and one p orbital participating in the hybridization. The sigma bond between the carbons is formed by the overlap of sp hybrid orbitals, while the pi bond is formed by the overlap of the two unhybridized p orbitals.
(b) Acid-base reaction of orthoboric acid in water:
The balanced chemical equation for the acid-base reaction of orthoboric acid (H3BO3) in water can be represented as follows:
H3BO3 + 3H2O → B(OH)4- + 3H3O+
In this reaction, orthoboric acid (H3BO3) reacts with water (H2O) to form the tetrahydroxyborate ion (B(OH)4-) and hydronium ions (H3O+). The reaction involves the transfer of protons (H+) from the acid to the water molecule, resulting in the formation of the conjugate base (B(OH)4-) and the hydronium ion.
(c) Increased acidity with ethylene glycol:
The addition of ethylene glycol to aqueous orthoboric acid enhances its acidity. This can be explained by the following chemical equation:
H3BO3 + 2HOCH2CH2OH → B(OH)4- + 2H3O+ + 2CH2OHCH2OH
In this reaction, orthoboric acid (H3BO3) reacts with ethylene glycol (HOCH2CH2OH) to form the tetrahydroxyborate ion (B(OH)4-), hydronium ions (H3O+), and additional ethylene glycol molecules. The ethylene glycol molecules act as a Lewis base, donating their lone pairs of electrons to the
To determine the most acidic compound among CH3CH3, CH2=CH2, and CH≡CH, we need to look at their respective conjugate bases. The compound with the most stable conjugate base will be the most acidic.
- CH3CH3: The conjugate base of CH3CH3 is CH3CH2-, which is stabilized by inductive effects due to the presence of two alkyl groups. However, it does not have any resonance stabilization.
- CH2=CH2: The conjugate base of CH2=CH2 is CH2=CH-, which is stabilized by both inductive effects and resonance. The pi bond can delocalize the negative charge, making the conjugate base more stable.
- CH≡CH: The conjugate base of CH≡CH is CH≡C-, which is stabilized by inductive effects, resonance, and also by the sp hybridization of the carbon atom. The sp hybridization allows for greater overlap of the carbon's p orbital with the p orbital of the neighboring carbon, making the conjugate base even more stable.
Therefore, the most acidic compound among these is CH≡CH, as it has the most stable conjugate base.
To show the bonding in CH≡CH, we can draw the overlap of orbitals using the concept of hybridization:
H
/
H - C ≡ C - H
\
H
In this structure, the carbon atoms are sp hybridized, meaning they have one s orbital and one p orbital participating in the hybridization. The sigma bond between the carbons is formed by the overlap of sp hybrid orbitals, while the pi bond is formed by the overlap of the two unhybridized p orbitals.
(b) Acid-base reaction of orthoboric acid in water:
The balanced chemical equation for the acid-base reaction of orthoboric acid (H3BO3) in water can be represented as follows:
H3BO3 + 3H2O → B(OH)4- + 3H3O+
In this reaction, orthoboric acid (H3BO3) reacts with water (H2O) to form the tetrahydroxyborate ion (B(OH)4-) and hydronium ions (H3O+). The reaction involves the transfer of protons (H+) from the acid to the water molecule, resulting in the formation of the conjugate base (B(OH)4-) and the hydronium ion.
(c) Increased acidity with ethylene glycol:
The addition of ethylene glycol to aqueous orthoboric acid enhances its acidity. This can be explained by the following chemical equation:
H3BO3 + 2HOCH2CH2OH → B(OH)4- + 2H3O+ + 2CH2OHCH2OH
In this reaction, orthoboric acid (H3BO3) reacts with ethylene glycol (HOCH2CH2OH) to form the tetrahydroxyborate ion (B(OH)4-), hydronium ions (H3O+), and additional ethylene glycol molecules. The ethylene glycol molecules act as a Lewis base, donating their lone pairs of electrons to the
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(a) identify the most acidic compound from the following: CH3 CH3, CH2 = CH2 and CH CH, and justify your answer. Draw overlap of the orbitals to show bonding in the most acidic compound using the concept of hybridization.(b) Write a balanced chemical equation to represent acid-base reaction of orthoboric acid in water.Addition of ethylene glycol to aqueous orthoboric acid enhances its acidity. Explain the above statement using appropriate chemical equation.Correct answer is '(a) CH ≡ CH is the most acidic compound among ethane and ethylene.(b) orthoboric acid in water:'. Can you explain this answer?
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(a) identify the most acidic compound from the following: CH3 CH3, CH2 = CH2 and CH CH, and justify your answer. Draw overlap of the orbitals to show bonding in the most acidic compound using the concept of hybridization.(b) Write a balanced chemical equation to represent acid-base reaction of orthoboric acid in water.Addition of ethylene glycol to aqueous orthoboric acid enhances its acidity. Explain the above statement using appropriate chemical equation.Correct answer is '(a) CH ≡ CH is the most acidic compound among ethane and ethylene.(b) orthoboric acid in water:'. Can you explain this answer? for IIT JAM 2024 is part of IIT JAM preparation. The Question and answers have been prepared according to the IIT JAM exam syllabus. Information about (a) identify the most acidic compound from the following: CH3 CH3, CH2 = CH2 and CH CH, and justify your answer. Draw overlap of the orbitals to show bonding in the most acidic compound using the concept of hybridization.(b) Write a balanced chemical equation to represent acid-base reaction of orthoboric acid in water.Addition of ethylene glycol to aqueous orthoboric acid enhances its acidity. Explain the above statement using appropriate chemical equation.Correct answer is '(a) CH ≡ CH is the most acidic compound among ethane and ethylene.(b) orthoboric acid in water:'. Can you explain this answer? covers all topics & solutions for IIT JAM 2024 Exam. Find important definitions, questions, meanings, examples, exercises and tests below for (a) identify the most acidic compound from the following: CH3 CH3, CH2 = CH2 and CH CH, and justify your answer. Draw overlap of the orbitals to show bonding in the most acidic compound using the concept of hybridization.(b) Write a balanced chemical equation to represent acid-base reaction of orthoboric acid in water.Addition of ethylene glycol to aqueous orthoboric acid enhances its acidity. Explain the above statement using appropriate chemical equation.Correct answer is '(a) CH ≡ CH is the most acidic compound among ethane and ethylene.(b) orthoboric acid in water:'. Can you explain this answer?.
(a) identify the most acidic compound from the following: CH3 CH3, CH2 = CH2 and CH CH, and justify your answer. Draw overlap of the orbitals to show bonding in the most acidic compound using the concept of hybridization.(b) Write a balanced chemical equation to represent acid-base reaction of orthoboric acid in water.Addition of ethylene glycol to aqueous orthoboric acid enhances its acidity. Explain the above statement using appropriate chemical equation.Correct answer is '(a) CH ≡ CH is the most acidic compound among ethane and ethylene.(b) orthoboric acid in water:'. Can you explain this answer? for IIT JAM 2024 is part of IIT JAM preparation. The Question and answers have been prepared according to the IIT JAM exam syllabus. Information about (a) identify the most acidic compound from the following: CH3 CH3, CH2 = CH2 and CH CH, and justify your answer. Draw overlap of the orbitals to show bonding in the most acidic compound using the concept of hybridization.(b) Write a balanced chemical equation to represent acid-base reaction of orthoboric acid in water.Addition of ethylene glycol to aqueous orthoboric acid enhances its acidity. Explain the above statement using appropriate chemical equation.Correct answer is '(a) CH ≡ CH is the most acidic compound among ethane and ethylene.(b) orthoboric acid in water:'. Can you explain this answer? covers all topics & solutions for IIT JAM 2024 Exam. Find important definitions, questions, meanings, examples, exercises and tests below for (a) identify the most acidic compound from the following: CH3 CH3, CH2 = CH2 and CH CH, and justify your answer. Draw overlap of the orbitals to show bonding in the most acidic compound using the concept of hybridization.(b) Write a balanced chemical equation to represent acid-base reaction of orthoboric acid in water.Addition of ethylene glycol to aqueous orthoboric acid enhances its acidity. Explain the above statement using appropriate chemical equation.Correct answer is '(a) CH ≡ CH is the most acidic compound among ethane and ethylene.(b) orthoboric acid in water:'. Can you explain this answer?.
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