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Tentukan kadar C dan N dalam urea (CO(NH2)2)(Ar C=12, O=16, N = 14, dan H= 1)?

Pertanyaan

Tentukan kadar C dan N dalam urea (CO(NH2)2)(Ar C=12, O=16, N = 14, dan H= 1)?

Pembahasan Soal:

menentukan Mr urea (CO(NH2)2) :
M subscript r space equals space A subscript r space C and A subscript r space O plus 2 cross times A subscript r space N space plus 4 cross times A subscript r space H space space M subscript r space equals space 12 space plus space 16 space plus space left parenthesis 2 cross times 14 right parenthesis space plus space left parenthesis 4 cross times 1 right parenthesis space M subscript r space equals space 60 gr forward slash mol 

menentukan kadar C:
percent sign C space equals fraction numerator space A subscript r space C over denominator Mr space C O open parentheses N H subscript 2 close parentheses subscript 2 space end fraction space cross times 100 percent sign space space percent sign C space equals space 12 over 60 cross times 100 percent sign percent sign C space equals space 20 percent sign 

menentukan kadar N:

percent sign N space equals space fraction numerator 2 space A subscript r space N over denominator M subscript r space C O open parentheses N H subscript 2 close parentheses subscript 2 space end subscript end fraction space cross times space 100 percent sign space space percent sign N space equals space 28 over 60 cross times space 100 percent sign space space percent sign N space equals space 46 comma 67 percent sign space space 

Jadikadar C = 20% dan kadar N = 46,67%.

Pembahasan terverifikasi oleh Roboguru

Terakhir diupdate 19 Mei 2021

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