K. 117 is a refined example of Mozart’s early liturgical style, offering a sophisticated interplay of melody and accompaniment. It is distinctive for its balanced, idiomatic writing that anticipates his mature works.
Focus on achieving a singing tone that carries through the entire phrase.
Benedictus sit Deus (K.117) is rated Henle level 4 of 9 — intermediate repertoire, roughly ABRSM grades 5–6. In the RCM system it corresponds to about level 6.
You should be comfortable at Henle level 4 — meaning you can already play level 3–4 pieces cleanly. Learning it one level early is possible as a stretch piece, but more than that usually leads to months of frustration.
A typical performance of Benedictus sit Deus (K.117) lasts about 4 minutes.
Benedictus sit Deus (K.117) is available as free public-domain sheet music on IMSLP — the score is linked directly from this page.