Question

-rate of photosyhthesis in presence of light intensity & CO2.

~A : sodium bicarbonate in darkness
pH b4 xperiment-9
" @ 20 min- 8
" 60 min- 8

~B: sodium bicarbonate in room light
pH b4 xperiment-9
" @ 20 min-9
" 60 min-8

~C: sodium bicarbonate 20 cm from light source
pH b4 xperiment-9
" @ 20 min-9
" 60 min-8

~D: without sodium bicarbonate 20 cm from light source
pH b4 xperiment-7
" @ 20 min-6
" 60 min-6

does my result confirm or contradict from the theory?? why?

*from what i search @ internet its seem our result is contradict....its suppose the ph leve increase right?