# Math Help - Ionization constants for acids and bases

1. ## Ionization constants for acids and bases

Is the $K_a$ value for hydrofluoric acid $3.5\times10^{-4}$ or $6.7\times10^{-4}$? I have two different textbooks for chemistry that have different values.
Ionization constants table from both textbooks:
http://img16.imageshack.us/img16/6718/32996808.jpg
http://img62.imageshack.us/img62/3728/60299474.jpg

2. Originally Posted by iamanoobatmath
Is the $K_a$ value for hydrofluoric acid $3.5\times10^{-4}$ or $6.7\times10^{-4}$? I have two different textbooks for chemistry that have different values.
Ionization constants table from both textbooks:
http://img16.imageshack.us/img16/6718/32996808.jpg
http://img62.imageshack.us/img62/3728/60299474.jpg
Your question is better posted here: http://www.chemistryhelpforum.com/chemistry-help/