How many letters does the top answer for “a salt formed by the union of hydrotelluric acid and the base.” have?

The most common answer is hydrotellurate (14 letters).

Crossword clue: a salt formed by the union of hydrotelluric acid and the base.

1 answer found in Letterora's clue database (Wikidata facts, Open Trivia DB, WordNet and Webster definitions — all licensed sources).

hydrotellurate 14 letters web-def

A salt formed by the union of hydrotelluric acid and the base.