Mozart's autograph of the sonata is held in the Jagiellonian Library, Kraków.

The movement shows two clear major themes, which have been decorated by the use of ornamentation, as was typical of the time.

The movement is in typical sonata form (composed of exposition, development, and recapitulation).

The very end of the movement which Mozart wrote, an F major coda, was misplaced in the autograph but appears in the 1784 publication.

The movement then modulates to its home key back to the A section, followed by a short coda.