As a practice I am trying to name the chords in each bar in Bach’s Prelude in C major.
Try writing down all the note names in one bar and try to arrange them so that they form a chord. E.g. in the second bar you have:
By trial and error you can put this in the form:
where the jump between each note is a third. This spells a Dm7 chord. Finally, note that the C is in the bass so you should probably write this as Dm7/C.
Also, if there are no accidentals (♯ or ♭) then the chord must be diatonic to the key you are in. In C major there is no A (major) chord, but only an Am. Hence you are wrong in the fifth bar. However, as been pointed out, you have several errors, so it is best to go through everything.
yes, there are several faults. you can find them yourself: Dm = Dm/C as the IIm7 (inversion) Am = Am/C (inversion) D7/C as a (V2) or V-V7 in 1st inversion I suppose you know yourself the inversion of the other chords
further you have a C# dim7/G leading to Dm and a B dim7/F leading to C, both as VII° 2nd inversion to the following chord in 1st inversion. I can poste you here the link or the copy the analysis of the whole preludium. I know there is one of HERMANN KELLER and SIEGLIND BRUHyou'll find also more than one analysis in youtube. anyway:it's a good practice to try this and to note just chords instead of the all the music and each motif. hope you got it: chords of prelude in C J.S. Bach wtc
C Dm/C G7/B C
Am/C D7/C G/B C
Am D7 G
C#dim7/G Dm/F Bdim C/E
Dm G7 C
try to finish your task by studying lessons 40-44 in of this site, that I've just found right here as advertisement on the right of your question.