Answer
Verified
401.4k+ views
Hint: During dissociation, the molecules that are formed when the acids lose a hydrogen atom are called a conjugate base for that particular acid.
Complete answer:
We know that, if we have an acid HA, it undergoes dissociation as –
\[\text{HA }\text{ }\to{{\text{H}}^{+}}\text{ + }{{\text{A}}^{-}}\].
So, we call \[{{\text{A}}^ - }\] to be the conjugate base of the acid HA.
If we look at \[{\text{HSO}}_4^ - \], it will dissociate as –
\[\text{HSO}_{4}^{-}\text{ }\to\text{ }{{\text{H}}^{+}}\text{ + SO}_{4}^{-2}\]
Hence, \[{\text{SO}}_4^{ - 2}\] will be the conjugate base of \[{\text{HSO}}_4^ - \] in an aqueous solution.
Therefore, option A is correct.
Additional Information Lowry and Bronsted gave the concept of conjugate acid and conjugate base. It is actually an extended version of Arrhenius theory of acids and bases. The theory states that when an acid and a base react with each other, exchange of protons occurs between them and in that exchange the substance or species which donates an ion or a proton is an acid and forms its conjugate base. Whereas, the species which accepts an ion or proton is a base and it forms its conjugate acid.
\[\text{Acid }\to\text{ Proton + Conjugate base}\]
If the conjugate base accepts a proton, acid is reformed.
\[\text{Base + proton}\to\text{ Conjugate acid}\]
If the conjugate acid donates a proton, the base is reformed.
Note: Strong acid forms a weak conjugate base and weak acid forms a strong conjugate base. They are also called acid-base pairs. Substances which have strong ability to exchange protons are called as strong Lowry-Bronsted acid/base and substances which have weak ability for exchange of protons are called weak Lowry-Bronsted acid/base.
Complete answer:
We know that, if we have an acid HA, it undergoes dissociation as –
\[\text{HA }\text{ }\to{{\text{H}}^{+}}\text{ + }{{\text{A}}^{-}}\].
So, we call \[{{\text{A}}^ - }\] to be the conjugate base of the acid HA.
If we look at \[{\text{HSO}}_4^ - \], it will dissociate as –
\[\text{HSO}_{4}^{-}\text{ }\to\text{ }{{\text{H}}^{+}}\text{ + SO}_{4}^{-2}\]
Hence, \[{\text{SO}}_4^{ - 2}\] will be the conjugate base of \[{\text{HSO}}_4^ - \] in an aqueous solution.
Therefore, option A is correct.
Additional Information Lowry and Bronsted gave the concept of conjugate acid and conjugate base. It is actually an extended version of Arrhenius theory of acids and bases. The theory states that when an acid and a base react with each other, exchange of protons occurs between them and in that exchange the substance or species which donates an ion or a proton is an acid and forms its conjugate base. Whereas, the species which accepts an ion or proton is a base and it forms its conjugate acid.
\[\text{Acid }\to\text{ Proton + Conjugate base}\]
If the conjugate base accepts a proton, acid is reformed.
\[\text{Base + proton}\to\text{ Conjugate acid}\]
If the conjugate acid donates a proton, the base is reformed.
Note: Strong acid forms a weak conjugate base and weak acid forms a strong conjugate base. They are also called acid-base pairs. Substances which have strong ability to exchange protons are called as strong Lowry-Bronsted acid/base and substances which have weak ability for exchange of protons are called weak Lowry-Bronsted acid/base.
Recently Updated Pages
Basicity of sulphurous acid and sulphuric acid are
Three beakers labelled as A B and C each containing 25 mL of water were taken A small amount of NaOH anhydrous CuSO4 and NaCl were added to the beakers A B and C respectively It was observed that there was an increase in the temperature of the solutions contained in beakers A and B whereas in case of beaker C the temperature of the solution falls Which one of the following statements isarecorrect i In beakers A and B exothermic process has occurred ii In beakers A and B endothermic process has occurred iii In beaker C exothermic process has occurred iv In beaker C endothermic process has occurred
What is the stopping potential when the metal with class 12 physics JEE_Main
The momentum of a photon is 2 times 10 16gm cmsec Its class 12 physics JEE_Main
How do you arrange NH4 + BF3 H2O C2H2 in increasing class 11 chemistry CBSE
Is H mCT and q mCT the same thing If so which is more class 11 chemistry CBSE
Trending doubts
Fill the blanks with the suitable prepositions 1 The class 9 english CBSE
Difference between Prokaryotic cell and Eukaryotic class 11 biology CBSE
Difference Between Plant Cell and Animal Cell
Fill the blanks with proper collective nouns 1 A of class 10 english CBSE
What is the color of ferrous sulphate crystals? How does this color change after heating? Name the products formed on strongly heating ferrous sulphate crystals. What type of chemical reaction occurs in this type of change.
One Metric ton is equal to kg A 10000 B 1000 C 100 class 11 physics CBSE
Change the following sentences into negative and interrogative class 10 english CBSE
Net gain of ATP in glycolysis a 6 b 2 c 4 d 8 class 11 biology CBSE
What organs are located on the left side of your body class 11 biology CBSE