The amphoteric reaction between two water molecules is endothermic, which means that this reaction requires the input of energy in order to proceed: Energy + H₂O + H₂O → H₃O⁺ + O H^-
The warmer the temperature of the water, the more thermal energy is available for this reaction, and the more hydronium and hydroxide ions are formed. Based on this information, should the value of K_w be expected to increase, decrease, or stay the same with increasing temperature?

Question

Quizplus · Accepted Answer

The value of KW increases with increasing temperature because there will be a higher concentration of both hydronium and hydroxide ions due to the endothermic reaction between water molecules. This is consistent with Le Chatelier's principle, as the increase in temperature shifts the equilibrium towards the side with more products to absorb the added heat. Therefore, the correct answer is C - the value of KW will increase with increasing temperature.

The Amphoteric Reaction Between Two Water Molecules Is Endothermic, Which