Jawabanmu

2014-06-06T20:44:33+07:00
PH = 4-log5
[H⁺] = 5x10⁻⁴
[H⁺] =  \sqrt{Ka.Ma}
5x10⁻⁴ =  \sqrt{10-5 . Ma}
25x10⁻⁸ = 10⁻⁵ . Ma
Ma = 25x10⁻³
α =  \sqrt{Ka/Ma}
α =  \sqrt{1x10-5/25x10-3}
α =  \sqrt{4x10-4}
α = 2x10⁻²
   = 2%