Question

The ______ officially granted Florida to the United States.

Answer 1

This is in the wrong section but the answer is The Pickney Treaty

Answer 2

Pinckney*

Answer 3

Pinckney's Treaty, also known as the Treaty of San Lorenzo or the Treaty of Madrid, was signed in San Lorenzo de El Escorial on October 27, 1795 and established intentions of friendship between the United States and Spain. It also defined the boundaries of the United States with the Spanish colonies and guaranteed the United States navigation rights on the Mississippi River. The treaty's full title is Treaty of Friendship, Limits, and Navigation Between Spain and the United States. Thomas Pinckney negotiated the treaty for the United States and Don Manuel de Godoy represented Spain. Among other things, it ended the first phase of the West Florida Controversy, a dispute between the two nations over the boundaries of the Spanish colony of West Florida.

The treaty was presented to the United States Senate on February 26, 1796 and after several weeks of debate was ratified on March 7, 1796. It was ratified by Spain on April 25, 1796 and ratifications were exchanged on that date. The treaty was proclaimed on August 3, 1796.
http://en.wikipedia.org/wiki/Pinckney's_Treaty