The decreased concentration of H+ in that basic solution shifts the equilibrium towards the conjugate base form (the deprotonated form of the acid).
ðə dˈiːkɹiːst kˌɑːnsəntɹˈeɪʃən ʌv ˈeɪtʃ plˈʌs ɪn ðæt bˈeɪsɪk səlˈuːʃən ʃˈɪfts ðɪ ˌiːkwɪlˈɪbɹiəm təwˈɔːɹdz ðə kˈɑːndʒuːɡˌeɪt bˈeɪs fˈɔːɹm ðə dᵻpɹˈoʊtənˌeɪɾᵻd fˈɔːɹm ʌvðɪ ˈæsɪd.