Hydrocyanic acid HCN (Ka = 4.9 × 10-10) Which acid has the strongest conjugate base? Hydrogen sulfate ion HSO4- (Ka = 1.2 × 10-2) Hydrocyanic acid HCN (Ka = 4.9 × 10-10) 1 decade ago. Favorite Answer. Conjugate base of HSO4- is SO4 (2-) Conjugate base of HC2H302 is C2H3O2-. Conjugate acid of CN- is HCN. Conjugate acid of CO3 (2-) is HCO3-. perrotti. Lv 4. 4 years... The conjugate acid of HPO42- is H2PO4-. HPO42- + H+ ----> H2PO4- PO43- is a weak conjugate base (since it is not the conjugate base of a strong acid, which has no strenth) has a charge of minus... To find conjugate base you have to remove H+ from the given species. Hint: CBR (Conjugate Base Remove H+) So conjugate base of HSO4- is SO4^-2. To find conjugate acid you have to add H+ to the given species. Hint: CAA (Conjugate Acid Add H+) So conjugate acid of HSO4- is H2SO4. Hope you liked the answer. Thanks for reading. HSO4- is a base since it has the ability to accept a proton but it is a conjugate base to H2SO4 since it is formed by the H2SO4 after donating a proton. The conjugate base of HSO4- is SO4 (2-), if that’s the question that you are asking. Is CN an acid or base? 28 more rows SO_4^(2-) Although it has a negative charge, it will never accept a H^+ to form H_2SO^4(sulfuric acid) . That is because sulfuric acid is a strong acid and completely disassociates in water. Therefore, the sulfate ion (SO_4^(2-)) is the conjugate base of HSO_4^-. The sulfate ion ( SO4 2− ) is the conjugate base of HSO−4. Reason : Even if it has a negative charge, it will never accept a H+ ion to form H2SO4 again . That is because sulfuric acid is a strong acid and completely disassociates in water. That’s why Sulphate Ion would be the conjugate base formed. what is the conjugate base for H2SO4. what is the conjugate acid for HSO4^-what is the conjugate base for HCl HSO− 4 +H2O → SO2− 4 +H3O+ H S O 4 − + H 2 O → S O 4 2 − + H 3 O +. From the reaction, HSO− 4 H S O 4 − acts as an acid and produces the conjugate base SO2− 4 S O 4 2 HSO4- ----> H+ + SO42- The conjugate acid of HPO42- is H2PO4-. HPO42- + H+ ----> H2PO4- PO43- is a susceptible conjugate base (considering the fact that it isn't the conjugate base of a powerful acid, which has no strenth) has a cost of minus three, which means it will possibly maintain 3 H+'s.
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