Video Solution: What term best describes the relationship between an al...

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Organic Chemistry / Acid and Base Conjugates / Problem #18193

What term best describes the relationship between an alkene and a carbocation?  

a. Isomers

b. Resonance contributors 

c. Alkene is conjugate acid of carbocation

d. Alkene is conjugate base of carbocation

Use curved arrows to show the movement of pair of electrons in the following acid-base reaction and show the structure of the conjugate base and the conjugate acid.

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Identify the acid, base, the conjugate acid and the conjugate base in each of the equations. 


1. HCl + NH3 ––> NH4+ + Cl- 


2. OH- + HCN ––> H2O + CN-


3. PO43- + HNO3 ––> NO3- + HPO42-


4. HCO3- + HCl ––> H2CO3 + Cl-

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What is the conjugate base of Phosphoric Acid, H3PO4 ?

a) HPO42–



d) H2PO4

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Label the acid, conjugate acid, base and conjugate base in the reaction below. 


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Give the conjugate bases of the following molecules.

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The following is a stepwise synthesis by applying Bronsted-Lowry (B-L) and Lewis acid-base (LA and LB) reactions. Please use electron-pushing arrows to show this transformation logically.

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Write the conjugate acid and conjugate base of the following ion: H 2PO4 1-

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Consider molecule A shown below. Remember that for a Lewis structure, you must show all atoms, all bonding valence electrons, all nonbonding valence electrons, and all nonzero formal charges.

Using Lewis structures for reactants and products and using curved arrows to show the flow of electrons in molecule A, give the chemical equation that shows the heterolytic dissociation of one of the three CH bonds in molecule A to give H+ and the corresponding conjugate base. If resonance structures exist for the conjugate base, give all important resonance structures for the conjugate base. Clearly give the numerical value of the HCC bond angle in this conjugate base of molecule A.

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The two substances which are both acids are:

a. HC ≡ CNa and HC ≡ CH
b. CH3NH2 and CH3NHNa
c. CH3NH2 and HC ≡ CH
d. HC ≡ CNa and CH3NH2
e. HC ≡ CNa and CH3NHNa

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