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Verified answer
Mapel : KimiaKelas : XI SMA
Kata Kunci : Tetapan Reaksi
Pembahasan :
pCl5 (g) = pCl3 (g) + Cl2 (g)
m —» 0,1 x x
b —» x x x
Sisa » (0,1 - x) , x , x
Tetapan keseimbangan = 0,05
[(pCl3)(Cl2) : pCl5] = 0,05
[(x)(x) : (0,1 - x)] = 0,05
x² : (0,1 - x) . (0,1 - x) = 0,05 (0,1 - x)
x² = 0,005 - 0,05x
x² + 0,05x - 0,005 = 0
1000x² + 50x - 5 = 0
200x² + 10x - 1 = 0
(20x - 1)(10x + 1) = 0
x = 1/20 = 0,05
x = -1/10 = - 0,1 (Tidak memenuhi)
Maka yang memenuhi adalah
x = 0,05
x = 0,05 . 100%
x = 5,00%
Jawaban : E