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Dari reaksi:  diperoleh data sebagai berikut:       Orde reaksi tersebut adalah...

Pertanyaan

Dari reaksi:

begin mathsize 14px style 2 N O open parentheses italic g close parentheses and 2 H subscript 2 open parentheses italic g close parentheses yields N subscript 2 open parentheses italic g close parentheses and 2 H subscript 2 O open parentheses italic g close parentheses end style diperoleh data sebagai berikut:
 

 
 

Orde reaksi tersebut adalah...undefined 

  1. begin mathsize 14px style 0 end style undefined 

  2. begin mathsize 14px style 1 end style undefined 

  3. begin mathsize 14px style 2 end style undefined 

  4. begin mathsize 14px style 3 end style undefined 

  5. begin mathsize 14px style 4 end style undefined 

Pembahasan Soal:

Dimisalkan, persamaan laju reaksi begin mathsize 14px style italic r equals italic k open square brackets N O close square brackets to the power of italic x begin italic style open square brackets H subscript straight 2 close square brackets end style to the power of italic y end style. Cara mencari orde reaksi begin mathsize 14px style N O space open parentheses x close parentheses end style adalah dengan memilih data konsentrasi begin mathsize 14px style H subscript 2 end style yang sama yaitu data (1) dan (2). 

begin mathsize 14px style italic r subscript 0 left parenthesis 1 right parenthesis end subscript over italic r subscript 0 left parenthesis 2 right parenthesis end subscript equals italic k subscript left parenthesis 1 right parenthesis end subscript over italic k subscript left parenthesis 2 right parenthesis end subscript cross times open square brackets fraction numerator N over denominator O subscript left parenthesis 1 right parenthesis end subscript N O subscript left parenthesis 2 right parenthesis end subscript end fraction close square brackets to the power of x cross times open square brackets H subscript 2 left parenthesis 1 right parenthesis end subscript over H subscript 2 left parenthesis 2 right parenthesis end subscript close square brackets to the power of y end style , harga begin mathsize 14px style italic k subscript left parenthesis 1 right parenthesis end subscript equals italic k subscript left parenthesis 2 right parenthesis end subscript end style (karena suhu tetap) dan begin mathsize 14px style H subscript 2 left parenthesis 1 right parenthesis end subscript double bond H subscript 2 left parenthesis 2 right parenthesis end subscript end style sehingga begin mathsize 14px style open square brackets H subscript 2 left parenthesis 1 right parenthesis end subscript over H subscript 2 left parenthesis 2 right parenthesis end subscript close square brackets space end style dapat dihilangkan (bernilai 1). 

begin mathsize 14px style table attributes columnalign right center left columnspacing 0px end attributes row cell fraction numerator 4 cross times 10 to the power of negative sign 6 end exponent space Ms to the power of negative sign 1 end exponent over denominator 4 cross times 10 to the power of negative sign 6 end exponent space Ms to the power of negative sign 1 end exponent end fraction end cell equals cell open parentheses fraction numerator 2 cross times 10 to the power of negative sign 3 end exponent over denominator 4 cross times 10 to the power of negative sign 3 end exponent end fraction close parentheses to the power of italic x cross times open parentheses fraction numerator 2 cross times 10 to the power of negative sign 3 end exponent over denominator 2 cross times 10 to the power of negative sign 3 end exponent end fraction close parentheses to the power of italic y end cell row 1 equals cell open parentheses 1 half close parentheses to the power of italic x end cell row italic x equals 0 end table end style   

Jadi orde reaksi terhadap undefined adalah 0.

Untuk menentukan orde reaksi begin mathsize 14px style H subscript 2 space open parentheses y close parentheses end style, pilihlah data konsentrasi undefined yang sama, yaitu (4) dan (5). 

begin mathsize 14px style italic r subscript left parenthesis 4 right parenthesis end subscript over italic r subscript left parenthesis 5 right parenthesis end subscript equals italic k subscript left parenthesis 4 right parenthesis end subscript over italic k subscript left parenthesis 5 right parenthesis end subscript cross times open square brackets fraction numerator N over denominator O subscript left parenthesis 4 right parenthesis end subscript N O subscript left parenthesis 5 right parenthesis end subscript end fraction close square brackets to the power of italic x cross times open square brackets H subscript 2 left parenthesis 4 right parenthesis end subscript over H subscript 2 left parenthesis 5 right parenthesis end subscript close square brackets to the power of italic y fraction numerator 36 cross times 10 to the power of negative sign 6 end exponent space Ms to the power of negative sign 1 end exponent over denominator 64 cross times 10 to the power of negative sign 6 end exponent space Ms to the power of negative sign 1 end exponent end fraction equals open parentheses fraction numerator 4 cross times 10 to the power of negative sign 3 end exponent over denominator 4 cross times 10 to the power of negative sign 3 end exponent end fraction close parentheses to the power of italic x cross times open parentheses fraction numerator 6 cross times 10 to the power of negative sign 3 end exponent over denominator 8 cross times 10 to the power of negative sign 3 end exponent end fraction close parentheses to the power of italic y 36 over 64 equals open parentheses 6 over 8 close parentheses to the power of italic y italic y equals 2 end style 

Jadi orde reaksi terhadap undefined adalah 2. Orde reaksi total adalah orde undefined ditambah orde reaksi undefined yaitu begin mathsize 14px style 0 plus 2 equals 2 end style. Jadi orde reaksi totalnya adalah 2.

Oleh karena itu, jawaban yang benar adalah C.undefined 

Pembahasan terverifikasi oleh Roboguru

Terakhir diupdate 02 April 2021

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