Water's high specific heat allows for the moderation of the Earth's climate and helps organisms regulate their body temperature more effectively. Water in a pure state has a neutral pH . As a result, pure water is neither acidic nor basic . Water changes its pH when substances are dissolved in it. Rain has a naturally acidic pH of about 5.6 because it contains natural derived carbon dioxide and sulfur dioxide.
Water conducts heat more easily than any liquid except mercury.
This fact causes large bodies of liquid water like lakes and oceans to have essentially a uniform vertical temperature profile. Water exists as a liquid over an important range of temperature from 0 - 100 degrees Celsius. This range allows water to remain as a liquid in most places on the Earth. Liquid water is a universal solvent . It is able to dissolve a large number of different chemical compounds.