Răspuns :
Răspuns:m Na2CO3 pur=200.15,2/100=30,4g Na2CO3+2HNO3=2NaNO3+CO2+H2O M Na2CO3=23.2+12+3.16=106g/mol MHNO3=1+14+3.16=63g/mol la 106g Na2CO3..................2.63g HNO3.................22,4LCO2 30,4g.......................................x..................................y x=30,4.2.63/106=36,135g HNO3 =md masa dizolvata C%=md.100/ms ms=md.100/C%=36,135.100/12,6=286,79g solutieHNO3 y=30,4.22,4/106=6,36LCO2
Explicație: