Malic acid MA (see Appendix C) has 2 titratable groups (2 pKa’s). Hydrogen malate HM is the singly charged state. Malate M is the fully ionized form of malic acid.

If the MA-HM-M solution is at pH 5.63, what is the TOTAL net charge on the MA-HM-M conjugate acid-base species? Use 3 sig figs and make to indicate polarity of the charge with – if negative.