Orthoboric acid () is a very weak acid, but its aqueous solution can be titrated accurately against if which of the following is added to the titration flask?

Question

Orthoboric acid ($H_3BO_3$) is a very weak acid, but its aqueous solution can be titrated accurately against $NaOH$ if which of the following is added to the titration flask?

Prashant Kotian · Accepted Answer

Correct answer: C. Boric acid cannot be titrated directly. Adding a cis-1,2-diol (like glycerol or mannitol) forms a highly stable cyclic chelate complex with the ion. This removes the borate product, driving the equilibrium forward and making it behave as a strong monobasic acid.

💡 Solution & Explanation

Practice 22,000+ questions like this