The soda ash in your analysis was assumed to be pure Na2CO3. If some of the Na2Co3 is replaced by an equal number of formula weights of NaHCO3, how would the volume of acid change from
(a) The starting point to the phenolphthalein end point?
(b) The phenolphthalein end point to the bromocresol green end point?
(c) The starting point to the bromocresol green end point?