Wow! Some surprisingly good counterpoint, though it's difficult to see how it will all fit together without the text underlay. Consciously or not, you've taken a cue from Niccolo Jommelli (1714-1774) in scoring your Requiem for voices and strings alone...his Requiem (1756) was the most popular and often requested of its day, until Mozart wrote his in 1791. The sparing orchestration makes it more likely to get played.
I agree with ComposaBoi on just about everything he said.
Measure 11: The tenor part goes dangerously low, down to B below tenor C; consider a D instead if it won't mess up your counterpoint.
Measure 17: Awkward for Violin I - the C on beat 3-1/2 is icky to try to reach down to there, it means shifting a third down the fingerboard for one note, then shifting back up again; consider the G above instead.
Measure 31: Odd ending, it seems to me. There is no third in the chord, and while that's not without precedent, I don't feel like it works here. Consider an E-flat as the final note in the Soprano and Violin I.
Show us more of this as you have it! Well done!