On a phase diagram, the slope of its solid-liquid boundary is unusually negative, and its triple point is at a temperature just above zero degrees Celsius.
Reacting a carbonate with an acid releases carbon dioxide and this compound. Alkali (AL-kuh-lye) metals react with this compound in a violently exothermic reaction. This compound is known as the (*) universal solvent. On a phase diagram, the slope of its solid-liquid boundary is unusually negative, and its triple point is at a temperature just above zero degrees Celsius. For 10 points, name this compound that, because its IUPAC ("eye"-"YOU"-"pack") name is its common name, is never actually referred to as dihydrogen monoxide ("dye-HYE-druh-jen muh-NOX-ide").
Reacting a carbonate with an acid releases carbon dioxide and this compound.
{water} [or {H2O} before "{dihydrogen}"]