The amphoteric reaction between two water molecules is endothermic,which means that this reaction requires the input of energy in order to proceed: Energy + $\mathrm { H } _ { 2 }$ O + $\mathrm { H } _ { 2 }$ O ? $\mathrm { H } _ { 3 }$ $\mathrm { O } ^ { + }$ + O $\mathrm { H } ^ { - }$ 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 $\mathrm { K } _ { \mathrm { W } }$ be expected to increase,decrease,or stay the same with increasing temperature?
A)The value of $\mathrm { K } _ { \mathrm { W } }$ will stay the same,since it is a constant.
B)The value of $\mathrm { K } _ { \mathrm { W } }$ will decrease,since there are more hydronium ions than hydroxide ions.
C)The value of $\mathrm { K } _ { \mathrm { W } }$ will increase since the rise in temperature allows for a higher concentration of both ions.
D)The value of $\mathrm { K } _ { \mathrm { W } }$

Question

Quizplus · Accepted Answer

The value of $\mathrm{K}_\mathrm{W}$, which represents the ion product of water, increases with temperature because the reaction forming hydronium and hydroxide ions is endothermic. As temperature rises, more of these ions are formed, increasing $\mathrm{K}_\mathrm{W}$.

The Amphoteric Reaction Between Two Water Molecules Is Endothermic,which Means H2\mathrm { H } _ { 2 }H2​

The Amphoteric Reaction Between Two Water Molecules Is Endothermic,which Means $\mathrm { H } _ { 2 }$