Question

cine stie sa faca problema 7 din imaginea de sus?

Answer 1

-ecuatia reactiei de obtinere a acetilenei
 1mol                                1mol
CaC2   +      H2O--->      C2H2+CaO
(4OgCa+2x12gC).....   22,4 dm³(l)
m=...................................8,96
m=25,6g carbid pur
-p/100= m,pur/m,i---> p=25,6x100/ 30= 85%

- ecuatia reactieie de bromurare
1mol               2mol
C2H2      +   2Br2---------> C2H2Br4
22,4 l............2molx2x80g/mol
8,96......................m= 128g Br2; este masa dizolvata in solutie---> m,d
- c/100= m,d/m,s---> 2/100= 128/ ms---CALCULEAZA  m,s in grame!!!