-for the saponification reaction in CSTR , why does NaOH concentration decreased when temperature increased, but conversion of NaOH (xNaOH) increased when temperature increased ?

- what are tge sources of error in CSTR for saponification reaction that made rate constant, conversion of NaOh and NaOH concentration to fluctuate like

XNaOH started 1.46 theb went to 1.49 then to 0.8 then 0.4 then 0.5 and to 0.6 ( this was when the temperature was 19 degrees)

also same for rate constant it started with 0.133 to 0.2 to 6 and then 1 and after that it increased steadily from 0.0125 to 0.08

-what assumptions can be made in CSTR saponification