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Soal UM-PTKIN Kimia Thn 2010 No. 75 – buku-on-line.com

Soal UM-PTKIN Kimia Thn 2010 No. 75

Soal Kimia UM-PTKIN No. 75

75.     Dalam senyawa-senyawa yang mengandung belerang di bawah ini, belerang yang memiliki bilangan oksidasi paling rendah terdapat dalam senyawa…

JAWABAN DAN PEMABAHASAN

75. ( C )

·         H2SO4

2.bo H + 1.bo S + 4.bo O = 0

2(+1) + bo S + 4(-2) = 0

(+2) + bo S – 8 = 0

Bil oksdsi S = +6

·         H2SO3

2.bo H + 1.bo S + 3.bo O = 0

2(+1) + bo S + 3 (-2) = 0

(+2) + bo S – 6 = 0

Bil.oksdsi S = +4

·         H2S

2.bo H + 1.bo S = 0

2(+1) + bo S = 0

(+2) + bo S = 0

Bil. oksdasi S = -2

·         SO2

1.bo S + 2.bo O =

bo S + 2(-2) = 0

bo S – 4 = 0

bil.oksdasi S = +4

·         S8

bo S = 0 (unsur bebas)

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