We have no idea.
The only US state that became a state in 1819 was Alabama. It wasn't "purchased", it was part of the Mississippi Territory, which had been claimed by the state of Georgia before being donated to the US government.
The state most commonly associated with the word "Purchase" is Louisiana, but a) the Louisiana Purchase occurred in 1804, and b) the state of Louisiana was formed from part of the area involved in the Louisiana Purchase in 1812, both well before 1819, so it seems unlikely that's what you're referring to.
Florida was purchased from Spain in 1819. It was negotiated by John Quincy Adams would was Secretary of State at the time.
Alabama became a state on December 14, 1819.
Alabama became a state on December 14,1819
On 14 December 1819 Alabama became the 22nd US State.
Somehow, it became a US territory after John Quincy Adams signed the Florida Purchase treaty in 1819. Afterwards, the US began to occupy the State after closing on the deal with Spain for $5 million.
John Quincy Adams the U.S. Secretary of State signed the treaty that signaled the purchase of the Florida territory.
The United States did not purchase a state from Spain for $5 million in 1877. However, the U.S. did purchase the territory of Florida from Spain in 1819 for $5 million through the Adams-OnΓs Treaty.
Alabama is the 22nd state on December 14, 1819
Missouri
In 1819, the US purchased Florida from Spain for $5 million.
In 1819.
Alabama