Question

calculeaza msol de acid clorhidric cu partea de masa a acidului clorhidric 20% penyru dizolvarea a 2.4 g de magneziu

Answer 1

A,Mg=24g/mol
n(niu)=m/A--> n=0,1mol Mg

1mol.....2mol
Mg +  2HCl---> MgCl2 +   H2
0,1mol....0,2mol
m,HCl= nxM--> m=0,2molx36,5g/mol= 7,3g

c/100= md/ms
20/100= 7,3/ms---> ms=...................calculeaza !!!!