Bromothymol blue is yellow in acid solutions.  HBB is acidic form of the indicator . The indicator is blue in basic solutions.  BB- is  basic form of the indicator.             HBB    +     H2O         H3O+      +    BB-                      In this case, HBB is an acidic form of the indicator. BB- is the basic form of the indicator. The acidic form is yellow in color and the basic form is the blue color.    (a) Predict what will happen if NaOH is added to the reaction system.  explain why ?    make sure to explain why?

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