Question

Which of the following has the lowest pOH?

A. H2SO4
B. HCl
C. HCN
D. All of them​

Answer 1

H2SO4 is a strong acid, which means that it dissociates completely in water to produce H+ ions. The more H+ ions in a solution, the lower the pOH. Therefore, H2SO4 has the lowest pOH of the three acids listed

Answer 2

Given to us:–

• Compounds :H2SO4, HCl, HCN

To find:–

• One with the lowest pOH - ??

What is pOH ?

pOH is a measurement of the concentration of hydroxide ions of a certain solution .

Which compound has the lowest pOH ?

A. H₂SO₄: Sulfuric acid is a strong acid . It completely dissociates in water , and forms H + and sulfate ions . However , it does not produce OH- ions .

B. HCl: Hydrochloric acid is also a strong acid and unlike sulfuric acid , it completely dissociates in water and forms H + and chloride ions .

C. HCN: Hydrogen cyanide is a weak acid ; it partially dissociates in water, and it forms H+ and cyanide ions (CN-) .

None of these compounds form OH- ions .

Henceforth, Answer = D