The amphoteric reaction between two water molecules is endothermic, which means the reaction requires the input of heat energy in order to proceed:Thewarmer the water, the more heat energy is available for this reaction, and the more hydronium and hydroxide ions are formed.
(a) Which has a lower pH: pure water that is hot or pure water that is cold?
(b) Is it possible for water to be neutral but to have a pH less than or greater than 7.0?

Transcribed Image Text:

Energy + H,0 + H2O 2 H3;0* + OH¯