Baking soda is sodium bicarbonate or sodium hydrogen carbonate It is alkaline and will therefore turn universal indicator purple or blue
The colour of sodium bicarbonate changes to blue. not too dark, not too light. it is more like a mix of blue and teal.
blue
pH 5.6
weak acid = orange/yellow
it is clear.
purple
5
red
Assuming it to be mostly a weak acid, the color would be orange/yellow
if oxygen present the colour of bicarbonate indicator will change to brown like in my experiment,i think it's not fully successful but not dissapoint me.
rainbow
YYEESSS
orange and PH of 6