Calculate the amount of potassium hydroxide substance with which 3 mol of formic acid will react?

According to the condition of the problem, we compose the reaction equation:
НСООН + KOH = HCOOK + H2O – ion exchange reaction, potassium formate and water are released;
Let’s compose the proportion according to the reaction equation:
3 mol (HCOOH) – X mol (KOH);
-1 mol -1 mol hence, X mol (KOH) = 3 * 1/1 = 3 mol;
Thus, the number of moles of formic acid and potassium hydroxide reacted are equal.
Answer: to carry out the reaction, you need 3 mol of potassium hydroxide.