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Koefisien reaksi dari persamaan reaksi Cu ( s ) + HNO 3 ​ ( a q ) → Cu ( NO 3 ​ ) 2 ​ ( a q ) + NO ( g ) + H 2 ​ O ( l ) berikut berturut-turut adalah ....

Koefisien reaksi dari persamaan reaksi



berikut berturut-turut adalah ....space 

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I. Solichah

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koefisien reaksi di atas berturut-turut adalah 3, 8, 3, 2, dan 4.

koefisien reaksi di atas berturut-turut adalah 3, 8, 3, 2, dan 4.space 

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Persamaan reaksi dikatakan sudah benar jika zat-zat yang terlibat dalam reaksi antara ruas kiri dan ruas kanan sudah setara jumlah maupun muatannya. Persamaan reaksi yang cukup kompleks tidak dapat diselesaikan secara coba-coba, tetapi melalui beberapa tahapan sebagai berikut. 1) Menuliskan kerangka persamaan reaksi 2) Membuat permisalan angka koefisien 3) Menentukan angka koefisien Tahap ini dilakukan dengan memisalkan angka koefisien salah satu senyawa yang direaksikan. Misal, jika , maka: 4) Menuliskan persamaan reaksi Jika hasil yang diinginkan adalah bilangan bulat, dapat dikalikan dengan penyebut pecahan agar hasilnya bilangan bulat. Jadi, koefisien reaksi di atas berturut-turut adalah 3, 8, 3, 2, dan 4.

Persamaan reaksi dikatakan sudah benar jika zat-zat yang terlibat dalam reaksi antara ruas kiri dan ruas kanan sudah setara jumlah maupun muatannya. Persamaan reaksi yang cukup kompleks tidak dapat diselesaikan secara coba-coba, tetapi melalui beberapa tahapan sebagai berikut.

1) Menuliskan kerangka persamaan reaksi


begin mathsize 14px style Cu open parentheses italic s close parentheses and H N O subscript 3 left parenthesis italic a italic q right parenthesis yields Cu open parentheses N O subscript 3 close parentheses subscript 2 left parenthesis italic a italic q right parenthesis plus N O open parentheses italic g close parentheses and H subscript 2 O open parentheses italic l close parentheses end style


2) Membuat permisalan angka koefisien


begin mathsize 14px style aCu open parentheses italic s close parentheses and bHNO subscript 3 left parenthesis italic a italic q right parenthesis yields cCu open parentheses N O subscript 3 close parentheses subscript 2 left parenthesis italic a italic q right parenthesis plus dNO open parentheses italic g close parentheses and eH subscript 2 O open parentheses italic l close parentheses end style


3) Menentukan angka koefisien


Tahap ini dilakukan dengan memisalkan angka koefisien salah satu senyawa yang direaksikan. Misal, jika begin mathsize 14px style italic a bold space bold equals bold space bold 1 end style, maka:


begin mathsize 14px style table attributes columnalign right center left columnspacing 0px end attributes row blank blank Cu end table table attributes columnalign right center left columnspacing 0px end attributes row blank blank colon end table table attributes columnalign right center left columnspacing 0px end attributes row blank blank a end table table attributes columnalign right center left columnspacing 0px end attributes row blank blank space end table table attributes columnalign right center left columnspacing 0px end attributes row blank equals blank end table table attributes columnalign right center left columnspacing 0px end attributes row blank blank space end table table attributes columnalign right center left columnspacing 0px end attributes row blank blank italic c end table table attributes columnalign right center left columnspacing 0px end attributes row blank blank bold space end table table attributes columnalign right center left columnspacing 0px end attributes row blank bold equals blank end table table attributes columnalign right center left columnspacing 0px end attributes row blank blank bold space end table table attributes columnalign right center left columnspacing 0px end attributes row blank blank bold 1 end table table attributes columnalign right center left columnspacing 0px end attributes row blank blank space end table table attributes columnalign right center left columnspacing 0px end attributes row blank blank H end table table attributes columnalign right center left columnspacing 0px end attributes row blank blank colon end table table attributes columnalign right center left columnspacing 0px end attributes row blank blank b end table table attributes columnalign right center left columnspacing 0px end attributes row blank blank space end table table attributes columnalign right center left columnspacing 0px end attributes row blank equals blank end table table attributes columnalign right center left columnspacing 0px end attributes row blank blank space end table table attributes columnalign right center left columnspacing 0px end attributes row blank blank 2 end table table attributes columnalign right center left columnspacing 0px end attributes row blank blank cell e space... space left parenthesis 1 right parenthesis end cell end table table attributes columnalign right center left columnspacing 0px end attributes row blank blank b end table table attributes columnalign right center left columnspacing 0px end attributes row blank blank space end table table attributes columnalign right center left columnspacing 0px end attributes row blank equals blank end table table attributes columnalign right center left columnspacing 0px end attributes row blank blank space end table table attributes columnalign right center left columnspacing 0px end attributes row blank blank 2 end table table attributes columnalign right center left columnspacing 0px end attributes row blank blank cell open parentheses 4 over 3 close parentheses end cell end table table attributes columnalign right center left columnspacing 0px end attributes row blank blank italic b end table table attributes columnalign right center left columnspacing 0px end attributes row blank blank bold space end table table attributes columnalign right center left columnspacing 0px end attributes row blank bold equals blank end table table attributes columnalign right center left columnspacing 0px end attributes row blank blank bold space end table table attributes columnalign right center left columnspacing 0px end attributes row blank blank cell bold 8 over bold 3 end cell end table table attributes columnalign right center left columnspacing 0px end attributes row blank blank N end table table attributes columnalign right center left columnspacing 0px end attributes row blank blank colon end table table attributes columnalign right center left columnspacing 0px end attributes row blank blank b end table table attributes columnalign right center left columnspacing 0px end attributes row blank blank space end table table attributes columnalign right center left columnspacing 0px end attributes row blank equals blank end table table attributes columnalign right center left columnspacing 0px end attributes row blank blank space end table table attributes columnalign right center left columnspacing 0px end attributes row blank blank 2 end table table attributes columnalign right center left columnspacing 0px end attributes row blank blank c end table table attributes columnalign right center left columnspacing 0px end attributes row blank blank plus end table table attributes columnalign right center left columnspacing 0px end attributes row blank blank d end table table attributes columnalign right center left columnspacing 0px end attributes row blank blank b end table table attributes columnalign right center left columnspacing 0px end attributes row blank blank space end table table attributes columnalign right center left columnspacing 0px end attributes row blank equals blank end table table attributes columnalign right center left columnspacing 0px end attributes row blank blank space end table table attributes columnalign right center left columnspacing 0px end attributes row blank blank 2 end table table attributes columnalign right center left columnspacing 0px end attributes row blank blank left parenthesis end table table attributes columnalign right center left columnspacing 0px end attributes row blank blank 1 end table table attributes columnalign right center left columnspacing 0px end attributes row blank blank right parenthesis end table table attributes columnalign right center left columnspacing 0px end attributes row blank blank plus end table table attributes columnalign right center left columnspacing 0px end attributes row blank blank d end table table attributes columnalign right center left columnspacing 0px end attributes row blank blank b end table table attributes columnalign right center left columnspacing 0px end attributes row blank blank space end table table attributes columnalign right center left columnspacing 0px end attributes row blank equals blank end table table attributes columnalign right center left columnspacing 0px end attributes row blank blank space end table table attributes columnalign right center left columnspacing 0px end attributes row blank blank 2 end table table attributes columnalign right center left columnspacing 0px end attributes row blank blank plus end table table attributes columnalign right center left columnspacing 0px end attributes row blank blank d end table table attributes columnalign right center left columnspacing 0px end attributes row blank blank space end table table attributes columnalign right center left columnspacing 0px end attributes row blank equals blank end table table attributes columnalign right center left columnspacing 0px end attributes row blank blank space end table table attributes columnalign right center left columnspacing 0px end attributes row blank blank 2 end table table attributes columnalign right center left columnspacing 0px end attributes row blank blank cell e space... space left parenthesis 2 right parenthesis end cell end table table attributes columnalign right center left columnspacing 0px end attributes row blank blank b end table table attributes columnalign right center left columnspacing 0px end attributes row blank blank space end table table attributes columnalign right center left columnspacing 0px end attributes row blank equals blank end table table attributes columnalign right center left columnspacing 0px end attributes row blank blank space end table table attributes columnalign right center left columnspacing 0px end attributes row blank blank 2 end table table attributes columnalign right center left columnspacing 0px end attributes row blank blank plus end table table attributes columnalign right center left columnspacing 0px end attributes row blank blank cell 1 half end cell end table table attributes columnalign right center left columnspacing 0px end attributes row blank blank e end table table attributes columnalign right center left columnspacing 0px end attributes row blank blank space end table table attributes columnalign right center left columnspacing 0px end attributes row blank equals blank end table table attributes columnalign right center left columnspacing 0px end attributes row blank blank space end table table attributes columnalign right center left columnspacing 0px end attributes row blank blank 2 end table table attributes columnalign right center left columnspacing 0px end attributes row blank blank e end table table attributes columnalign right center left columnspacing 0px end attributes row blank blank 2 end table table attributes columnalign right center left columnspacing 0px end attributes row blank blank space end table table attributes columnalign right center left columnspacing 0px end attributes row blank equals blank end table table attributes columnalign right center left columnspacing 0px end attributes row blank blank space end table table attributes columnalign right center left columnspacing 0px end attributes row blank blank cell 3 over 2 end cell end table table attributes columnalign right center left columnspacing 0px end attributes row blank blank e end table table attributes columnalign right center left columnspacing 0px end attributes row blank blank italic e end table table attributes columnalign right center left columnspacing 0px end attributes row blank blank bold space end table table attributes columnalign right center left columnspacing 0px end attributes row blank bold equals blank end table table attributes columnalign right center left columnspacing 0px end attributes row blank blank bold space end table table attributes columnalign right center left columnspacing 0px end attributes row blank blank cell bold 4 over bold 3 space... space dimasukkan space ke space pers point space left parenthesis 1 right parenthesis space dan space left parenthesis 3 right parenthesis end cell end table table attributes columnalign right center left columnspacing 0px end attributes row blank blank O end table table attributes columnalign right center left columnspacing 0px end attributes row blank blank colon end table table attributes columnalign right center left columnspacing 0px end attributes row blank blank 3 end table table attributes columnalign right center left columnspacing 0px end attributes row blank blank b end table table attributes columnalign right center left columnspacing 0px end attributes row blank blank space end table table attributes columnalign right center left columnspacing 0px end attributes row blank equals blank end table table attributes columnalign right center left columnspacing 0px end attributes row blank blank space end table table attributes columnalign right center left columnspacing 0px end attributes row blank blank 6 end table table attributes columnalign right center left columnspacing 0px end attributes row blank blank c end table table attributes columnalign right center left columnspacing 0px end attributes row blank blank plus end table table attributes columnalign right center left columnspacing 0px end attributes row blank blank d end table table attributes columnalign right center left columnspacing 0px end attributes row blank blank plus end table table attributes columnalign right center left columnspacing 0px end attributes row blank blank e end table table attributes columnalign right center left columnspacing 0px end attributes row blank blank 3 end table table attributes columnalign right center left columnspacing 0px end attributes row blank blank left parenthesis end table table attributes columnalign right center left columnspacing 0px end attributes row blank blank 2 end table table attributes columnalign right center left columnspacing 0px end attributes row blank blank plus end table table attributes columnalign right center left columnspacing 0px end attributes row blank blank d end table table attributes columnalign right center left columnspacing 0px end attributes row blank blank right parenthesis end table table attributes columnalign right center left columnspacing 0px end attributes row blank blank space end table table attributes columnalign right center left columnspacing 0px end attributes row blank equals blank end table table attributes columnalign right center left columnspacing 0px end attributes row blank blank space end table table attributes columnalign right center left columnspacing 0px end attributes row blank blank 6 end table table attributes columnalign right center left columnspacing 0px end attributes row blank blank left parenthesis end table table attributes columnalign right center left columnspacing 0px end attributes row blank blank 1 end table table attributes columnalign right center left columnspacing 0px end attributes row blank blank right parenthesis end table table attributes columnalign right center left columnspacing 0px end attributes row blank blank plus end table table attributes columnalign right center left columnspacing 0px end attributes row blank blank d end table table attributes columnalign right center left columnspacing 0px end attributes row blank blank plus end table table attributes columnalign right center left columnspacing 0px end attributes row blank blank e end table table attributes columnalign right center left columnspacing 0px end attributes row blank blank blank row blank blank blank end table table attributes columnalign right center left columnspacing 0px end attributes row blank blank cell up diagonal strike 6 end cell end table table attributes columnalign right center left columnspacing 0px end attributes row blank blank plus end table table attributes columnalign right center left columnspacing 0px end attributes row blank blank 3 end table table attributes columnalign right center left columnspacing 0px end attributes row blank blank d end table table attributes columnalign right center left columnspacing 0px end attributes row blank blank space end table table attributes columnalign right center left columnspacing 0px end attributes row blank equals blank end table table attributes columnalign right center left columnspacing 0px end attributes row blank blank space end table table attributes columnalign right center left columnspacing 0px end attributes row blank blank cell up diagonal strike 6 end cell end table table attributes columnalign right center left columnspacing 0px end attributes row blank blank plus end table table attributes columnalign right center left columnspacing 0px end attributes row blank blank d end table table attributes columnalign right center left columnspacing 0px end attributes row blank blank plus end table table attributes columnalign right center left columnspacing 0px end attributes row blank blank e end table table attributes columnalign right center left columnspacing 0px end attributes row blank blank blank row blank blank blank end table table attributes columnalign right center left columnspacing 0px end attributes row blank blank 2 end table table attributes columnalign right center left columnspacing 0px end attributes row blank blank d end table table attributes columnalign right center left columnspacing 0px end attributes row blank blank space end table table attributes columnalign right center left columnspacing 0px end attributes row blank equals blank end table table attributes columnalign right center left columnspacing 0px end attributes row blank blank space end table table attributes columnalign right center left columnspacing 0px end attributes row blank blank e end table table attributes columnalign right center left columnspacing 0px end attributes row blank blank blank row blank blank blank end table table attributes columnalign right center left columnspacing 0px end attributes row blank blank d end table table attributes columnalign right center left columnspacing 0px end attributes row blank blank space end table table attributes columnalign right center left columnspacing 0px end attributes row blank equals blank end table table attributes columnalign right center left columnspacing 0px end attributes row blank blank space end table table attributes columnalign right center left columnspacing 0px end attributes row blank blank cell 1 half end cell end table table attributes columnalign right center left columnspacing 0px end attributes row blank blank cell e space... space left parenthesis 3 right parenthesis space dimasukkan space ke space pers point space left parenthesis 2 right parenthesis end cell end table table attributes columnalign right center left columnspacing 0px end attributes row blank blank blank row blank blank blank end table table attributes columnalign right center left columnspacing 0px end attributes row blank blank d end table table attributes columnalign right center left columnspacing 0px end attributes row blank blank space end table table attributes columnalign right center left columnspacing 0px end attributes row blank equals blank end table table attributes columnalign right center left columnspacing 0px end attributes row blank blank space end table table attributes columnalign right center left columnspacing 0px end attributes row blank blank cell 1 half end cell end table table attributes columnalign right center left columnspacing 0px end attributes row blank blank cell open parentheses 4 over 3 close parentheses end cell end table table attributes columnalign right center left columnspacing 0px end attributes row blank blank blank row blank blank blank end table table attributes columnalign right center left columnspacing 0px end attributes row blank blank italic d end table table attributes columnalign right center left columnspacing 0px end attributes row blank blank bold space end table table attributes columnalign right center left columnspacing 0px end attributes row blank bold equals blank end table table attributes columnalign right center left columnspacing 0px end attributes row blank blank bold space end table table attributes columnalign right center left columnspacing 0px end attributes row blank blank cell bold 2 over bold 3 end cell end table end style


4) Menuliskan persamaan reaksi


begin mathsize 14px style Cu open parentheses italic s close parentheses plus 8 over 3 H N O subscript 3 left parenthesis italic a italic q right parenthesis yields Cu open parentheses N O subscript 3 close parentheses subscript 2 left parenthesis italic a italic q right parenthesis plus 2 over 3 N O open parentheses italic g close parentheses plus 4 over 3 H subscript 2 O open parentheses italic l close parentheses end style


Jika hasil yang diinginkan adalah bilangan bulat, dapat dikalikan dengan penyebut pecahan agar hasilnya bilangan bulat.


begin mathsize 14px style 3 Cu open parentheses italic s close parentheses and 8 H N O subscript 3 left parenthesis italic a italic q right parenthesis yields 3 Cu open parentheses N O subscript 3 close parentheses subscript 2 left parenthesis italic a italic q right parenthesis plus 2 N O open parentheses italic g close parentheses and 4 H subscript 2 O open parentheses italic l close parentheses end style


Jadi, koefisien reaksi di atas berturut-turut adalah 3, 8, 3, 2, dan 4.space 

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