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Tentukan persentase kadar masing-masing unsur dalam senyawaberikut. a. ( NH 4 ​ ) 2 ​ SO 4 ​

Tentukan persentase kadar masing-masing unsur dalam senyawa berikut. 

a.  

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A. Chandra

Master Teacher

Mahasiswa/Alumni Universitas Negeri Jakarta

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Jawaban

% N, % H, % S, dan % O dalam senyawa berturut-turut adalah 21,21%, 6,06%, 24,24%, dan 48,48%.

% N, % H, % S, dan % O dalam senyawa berturut-turut adalah 21,21%, 6,06%, 24,24%, dan 48,48%.

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Pembahasan

Diketahui N = 14, H = 1, S = 32, O = 16, sehingga nilai : Menentukan persentase kadar masing-masing unsur: Jadi % N, % H, % S, dan % O dalam senyawa berturut-turut adalah 21,21%, 6,06%, 24,24%, dan 48,48%.

Diketahui italic A subscript r N = 14, H = 1, S = 32, O = 16, sehingga nilai italic M subscript r space open parentheses N H subscript 4 close parentheses subscript 2 S O subscript 4:

table attributes columnalign right center left columnspacing 0px end attributes row cell italic M subscript r space open parentheses N H subscript 4 close parentheses subscript 2 S O subscript 4 end cell equals cell left parenthesis 2 cross times italic A subscript r space N right parenthesis plus left parenthesis 8 cross times italic A subscript r space H right parenthesis plus left parenthesis 1 cross times italic A subscript r space S right parenthesis plus left parenthesis 4 cross times italic A subscript r space O right parenthesis end cell row blank equals cell left parenthesis 2 cross times 14 right parenthesis plus left parenthesis 8 cross times 1 right parenthesis plus left parenthesis 1 cross times 32 right parenthesis plus left parenthesis 4 cross times 16 right parenthesis end cell row blank equals cell 28 plus 8 plus 32 plus 64 end cell row blank equals cell 132 space g space mol to the power of negative sign 1 end exponent end cell end table 

Menentukan persentase kadar masing-masing unsur:

table attributes columnalign right center left columnspacing 0px end attributes row cell percent sign N end cell equals cell fraction numerator 2 cross times italic A subscript r space N over denominator italic M subscript r space open parentheses N H subscript 4 close parentheses subscript 2 S O subscript 4 end fraction cross times 100 percent sign end cell row blank equals cell fraction numerator 2 cross times 14 over denominator 132 end fraction cross times 100 percent sign end cell row blank equals cell 28 over 132 cross times 100 percent sign end cell row blank equals cell 21 comma 21 percent sign end cell end table 

table attributes columnalign right center left columnspacing 0px end attributes row cell percent sign H end cell equals cell fraction numerator 8 cross times italic A subscript r space H over denominator italic M subscript r space open parentheses N H subscript 4 close parentheses subscript 2 S O subscript 4 end fraction cross times 100 percent sign end cell row blank equals cell fraction numerator 8 cross times 1 over denominator 132 end fraction cross times 100 percent sign end cell row blank equals cell 8 over 132 cross times 100 percent sign end cell row blank equals cell 6 comma 06 percent sign end cell end table 

table attributes columnalign right center left columnspacing 0px end attributes row cell percent sign S end cell equals cell fraction numerator 1 cross times italic A subscript r space S over denominator italic M subscript r space open parentheses N H subscript 4 close parentheses subscript 2 S O subscript 4 end fraction cross times 100 percent sign end cell row blank equals cell fraction numerator 1 cross times 32 over denominator 132 end fraction cross times 100 percent sign end cell row blank equals cell 32 over 132 cross times 100 percent sign end cell row blank equals cell 24 comma 24 percent sign end cell end table 

table attributes columnalign right center left columnspacing 0px end attributes row cell percent sign O end cell equals cell fraction numerator 4 cross times italic A subscript r space O over denominator italic M subscript r space open parentheses N H subscript 4 close parentheses subscript 2 S O subscript 4 end fraction cross times 100 percent sign end cell row blank equals cell fraction numerator 4 cross times 16 over denominator 132 end fraction cross times 100 percent sign end cell row blank equals cell 64 over 132 cross times 100 percent sign end cell row blank equals cell 48 comma 48 percent sign end cell end table 

Jadi % N, % H, % S, dan % O dalam senyawa berturut-turut adalah 21,21%, 6,06%, 24,24%, dan 48,48%.

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