미정계수법. Na + H2O → NaOH + H2

미정계수법. Na + H2O → NaOH + H2

 

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▶ 미정계수법 설명 https://ywpop.tistory.com/3902

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aNa + bH2O → xNaOH + yH2

 

 

Na: a = x ... (1)

H: 2b = x + 2y ... (2)

O: b = x ... (3)

 

 

x = 1 이라 두면,

from (1), a = 1

from (3), b = 1

 

from (2), 2 = 1 + 2y

y = 1/2

 

 

계수는 정수이어야 하므로, 2씩 곱하면,

x = 2

a = 2

b = 2

y = 1

 

 

2Na + 2H2O → 2NaOH + H2

 

 

[ 참고 https://ywpop.tistory.com/9170 ] redox balance. Na + H2O → NaOH + H2