It has an equal concentration of hydrogen ions (H+) and hydroxide ions (OH-), each with a concentration of 1.0 x 10^-7 moles per liter of water at 25 degrees Celsius. This means that pure water has a pH of 7, which is considered neutral.

Acidity and basicity are measured on a logarithmic scale ranging from 0 to 14.

-A pH below 7 indicates acidity, with lower pH values corresponding to higher acidity.

-A pH above 7 indicates basicity, with higher pH values corresponding to higher basicity.

Acids are substances that donate hydrogen ions (H+) to other substances, while bases are substances that accept hydrogen ions (H+) from other substances. Salts are the products of an acid-base reaction and consist of positively charged ions (cations) and negatively charged ions (anions).