Table of Contents
- 1 Why is ethylene more acidic?
- 2 Is ethylene acidic or basic?
- 3 Which is more acidic ethylene or acetylene?
- 4 Is ethylene less acidic than acetylene?
- 5 Which of these is most acidic?
- 6 What is the pKa value of ethylene and ammonia?
- 7 Why is the electronegativity of carbon in ethyne higher than that of ethyne?
Why is ethylene more acidic?
The conjugate base of ethylene is more stable than ethane’s conjugate base because it has a greater s character. The s character is 33\% which makes it more acidic.
Is ethylene a strong acid?
Both the hydrogen atoms are identical and connected with carbon which is sp hybridised hence, Ethyne is most acidic. Ethene is less acidic than Ethene as the carbon containing hydrogen is sp2 hybridised (\%s character is 33.3, hence less electronegative).
Is ethylene acidic or basic?
Ethylene
| Names | |
|---|---|
| Acidity (pKa) | 44 |
| Conjugate acid | Ethenium |
| Magnetic susceptibility (χ) | -15.30·10−6 cm3/mol |
| Viscosity | 10.28 μPa·s |
Which is more acidic water or ethylene?
Ethyne is more acidic than water as the p character of C is 50\% which tends to attract the bond pair of e- and pushes H+ out of the structure.
Which is more acidic ethylene or acetylene?
So, acidity of ethylene is less than that of acetylene i.e., acetylene is more acidic than ethylene.
Why is ethylene more acidic than acetylene?
The s-character of sp-hybridised carbon atom of acetylene is greater than that of the sp2-hybridised carbon atom of ethylene. So electronegativity of the carbon atom of acetylene (CH≡CH) is greater than the carbon atom of ethylene (CH2=CH2) .
Is ethylene less acidic than acetylene?
In acetylene carbon atoms are sp hybridised. In sp hybrdisation,50\% s characters are present. Greater the percent of ‘s’orbital in hybridisation,greater is the electronegativity of the atom. Thus in acetylene difference in electronegativity of hydrogen and carbon is more,hence more acidic.
Which of the is most acidic?
In m-chlorophenol electron withdrawing group (-Cl) is present at meta position. Presence of electron withdrawing group increases the acidic strength. So, m-chlorophenol is most acidic among all the given compounds. The correct option is (d).
Which of these is most acidic?
Halogens have both +R and −I effect, but the −I effect predominates over the +R-effect. Therefore, m-Chlorophenol is most acidic due to electron withdrawing −Cl group.
Is ethyne more acidic than ammonia?
Yes ethyne is more acidc than Ammonia. Due to more s character on the carbon atom of ethylene, the electron will be closer to nucleus, and this lowers the energy, making it more stable. The pKa value of ethylene is 25 whereas for ammonia it is 38.
What is the pKa value of ethylene and ammonia?
The pKa value of ethylene is 25 whereas for ammonia it is 38. As general rule LOWER THE pKa VALUE , MORE ACIDC IS THE MOLECULE. The below mentioned link would really useful in understanding the acidity of organic molecules. Do check this 5 Key Factors That Affect Acidity in Organic Chemistry
Which of the following is the best acid in nature?
The order of acidic nature would be: water > ethyne > ammonia > ethane. Since oxygen has highest electronegativity amongst the atoms of the compounds, so its hydrogen will be most acidic and hence will be best acid among them.
Why is the electronegativity of carbon in ethyne higher than that of ethyne?
Ethyne contains $\\mathrm{sp}$-carbon and as a result the electronegativity of the carbon in ethyne is more than $\\mathrm{sp^3}$due to increased $\\mathrm{s}$-character (50\%) in the bonds between the carbon atoms.