Rank the given compounds based on their relative acidities strongest acid weakest acid H3CCH3, HCECCH3, HF, H2C=CH2, H3CNH2
Answer to question 1
H2O, HC(triple bond)CCH3, H3CNH2, H2C (double bond)CHCH3, H3CCH3
Answer to question 2
We are given the following molecules
- Higher the stability of the conjugate base, the higher will be the stability of the acid.
- Lower the stability of the conjugate base, lower will be the stability of the acid.
- HF is strongest acid as the conjugate base F−F− is the most stable conjugate base among the conjugate base of the given acids.
- Terminal alkynes (HCCCH33) are also acidic in nature as the acetylide ion (Conjugate base) is also more stable because of the stabilization of negative charge by sp hybrid orbital.
- Alkenes are more stable than alkane because the conjugate base of alkene is more stable than the conjugate base of alkane as the negative charge is more stabilized by sp2sp2 hybrid orbital.
- Methylamine (CH3NH2CH3NH2) will act as the base as nitrogen atom has lone pair of electron.
The decreasing order of acidities of the molecule is shown below
Answer to question 3