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Jika suatu basa Al(OH) 3 sebanyak 15,6 gram tepat dinetralkan dengan 29,4 gram asam H 2 A, maka Mr H 2 A adalah… g/mol. (Ar Al = 27, H = 1, O = 16)

Jika suatu basa Al(OH)3 sebanyak 15,6 gram tepat dinetralkan dengan 29,4 gram asam H2A, maka Mr H2A adalah… g/mol. (Ar Al = 27, H = 1, O = 16)

  1. 147

  2. 106

  3. 98

  4. 90

  5. 82

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M. Firdhaus

Master Teacher

Mahasiswa/Alumni Universitas Jember

Jawaban terverifikasi

Pembahasan

M r space A l left parenthesis O H right parenthesis subscript 3 space equals space A r space A l space plus space 3 space left parenthesis A r space O space plus space A r space H right parenthesis space space space space space space space space space space space space space space space space space space space space space space space equals space 27 space plus space 3 left parenthesis 16 space plus space 1 right parenthesis space space space space space space space space space space space space space space space space space space space space space space space equals space 27 space plus space 3 left parenthesis 17 right parenthesis space space space space space space space space space space space space space space space space space space space space space space space equals space 27 space plus space 51 space space space space space space space space space space space space space space space space space space space space space equals space 78 space  M o l space A l left parenthesis O H right parenthesis subscript 3 space equals space fraction numerator g r a m space A l left parenthesis O H right parenthesis subscript 3 over denominator M r space A l left parenthesis O H right parenthesis subscript 3 end fraction space space space space space space space space space space space space space space space space space space space space space space space equals space fraction numerator 15 comma 6 space g r a m over denominator 78 space g r a m divided by m o l end fraction space space space space space space space space space space space space space space space space space space space space space space space equals space 0 comma 2 space m o l d a r i space r e a k s i comma space d a p a t space d i g u n a k a n space p e r b a n d i n g a n space m o l. 2 space A l left parenthesis O H right parenthesis subscript 3 space plus space 3 space H subscript 2 A space rightwards arrow space A l subscript 2 A subscript 3 space plus space 6 space H subscript 2 O space space space space 0 comma 2 space m o l space space space space space space space 0 comma 3 space m o l  m o l space H subscript 2 A space equals space 0 comma 3 space m o l fraction numerator g r a m space H subscript 2 A space over denominator M r space H subscript 2 A space end fraction space equals m o l space H subscript 2 A M r space H subscript 2 A space equals space fraction numerator g r a m space H subscript 2 A space over denominator m o l space H subscript 2 A space end fraction space space space space space space space space space space space space space space space equals space fraction numerator 29 comma 4 space g r a m over denominator 0 comma 3 space m o l end fraction space space space space space space space space space space space space space space space space equals space 98 space g r a m divided by m o l

 

 

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