Question

Problema 10, va rog!

Answer 1

  m g............................................................................................ 5,76 g

glucoza-CH=O  +  2Cu(OH)2  => ac. gluconic-COOH + Cu2O + 2H2O

 180 g/mol ..................................................................................144 g/mol

=> m = 180x5,76/144 = 7,2 g glucoza

dar solutia de zahar contine cantitati egale de glucoza si zaharoza

=> md = 2xm.glucoza = 2x7,2 = 14,4 g

ms  = 100 g, md = 14,4 g

ms = md + m.apa

=> m.apa = ms - md = 100 - 14,4 = 85,6 g

=> B)