Roboguru

Asam hipobromit (HOBr) adalah asam lemah dengan . ...

Asam hipobromit (HOBr) adalah asam lemah dengan begin mathsize 14px style straight K subscript straight a equals 10 to the power of negative 9 end exponent end style . Perbandingan begin mathsize 14px style fraction numerator open square brackets HOBr close square brackets over denominator open square brackets OBr to the power of minus close square brackets end fraction end style dalam larutan NaOBr pada pH = 10 adalah ....

  1. begin mathsize 12px style 10 to the power of negative 5 end exponent end style

  2. begin mathsize 12px style 10 to the power of negative 4 end exponent end style

  3. begin mathsize 12px style 10 to the power of negative 2 end exponent end style

  4. begin mathsize 12px style 10 to the power of negative 1 end exponent end style

  5. 10

Jawaban:

begin mathsize 14px style pH space larutan space garam space NaOBr space equals space 10  pOH equals 14 – 10 space  pOH equals 4  left square bracket OH to the power of – right square bracket equals 10 to the power of – 4 end exponent space straight M    Ionisasi space NaOBr space  NaOBr space left parenthesis aq right parenthesis space rightwards arrow space Na to the power of plus plus OBr to the power of –    OBr to the power of – space adalah space ion space dari space basa space lemah space bisa space mengalami space hidrolisis.  OBr to the power of – plus straight H subscript 2 straight O space leftwards arrow over rightwards arrow space HOBr plus OH to the power of –    Kh equals fraction numerator open square brackets HOBr close square brackets straight space left square bracket OH to the power of minus right square bracket over denominator left square bracket OBr to the power of minus right square bracket end fraction  10 to the power of negative 14 end exponent over 10 to the power of negative 9 end exponent equals fraction numerator open square brackets HOBr close square brackets straight space open square brackets 10 to the power of negative 4 end exponent close square brackets over denominator left square bracket OBr to the power of minus right square bracket end fraction  fraction numerator 10 to the power of negative 14 end exponent over denominator left parenthesis 10 to the power of negative 9 end exponent right parenthesis straight space left parenthesis left parenthesis 10 to the power of negative 4 end exponent right parenthesis end fraction equals fraction numerator open square brackets HOBr close square brackets straight space over denominator left square bracket OBr to the power of minus right square bracket end fraction  fraction numerator open square brackets HOBr close square brackets straight space over denominator left square bracket OBr to the power of minus right square bracket end fraction equals 10 to the power of negative 1 end exponent end style

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