Suggest a suitable indicator for a titration based on each of the following reactions. Use 0.05 M

Question:

Suggest a suitable indicator for a titration based on each of the following reactions. Use 0.05 M if an equivalence point concentration is needed.
*(a) H2CO3 + NaOH → NaHCO3 + H2O
(b) H2P + 2NaOH → Na2P + 2H2O (H2P = o-phthalic acid)
*(c) H2T + 2NaOH → Na2T 1 2H2O (H2T = tartaric acid)
(d) NH2C2H4NH2 + HCl → NH2C2H4NH3Cl
*(e) NH2C2H4NH2 + 2HCl → ClNH3C2H4NH3Cl
*(g) H2SO3 + 2NaOH → Na2SO3 + 2H2O