For example, sulfuric acid (H2SO4) can donate one proton to form the bisulfate anion (HSO), for which Ka1 is very large; then it can donate a second proton to form the sulfate anion (SO), wherein the Ka2 is intermediate strength.
fɔːɹ ɛɡzˈæmpəl, sʌlfjˈʊɹɹɪk ˈæsɪd ˈeɪtʃ tˈuː sˌoʊ fˈoːɹ kæn doʊnˈeɪt wˈʌn pɹˈoʊtɑːn tə fˈɔːɹm ðə baɪsˈʌlfeɪt ˈænaɪən ˌeɪtʃˌɛsˈoʊ, fɔːɹ wˌɪtʃ kˈɑː wˈʌn ɪz vˈɛɹi lˈɑːɹdʒ; ðˈɛn ɪt kæn doʊnˈeɪt ɐ sˈɛkənd pɹˈoʊtɑːn tə fˈɔːɹm ðə sˈʌlfeɪt ˈænaɪən sˈoʊ, wˈɛɹɪn ðə kˈɑː tˈuː ɪz ˌɪntɚmˈiːdiət stɹˈɛŋθ.