Question

am nevoie mare de ajutor!
Va rog frumos!

Answer 1

-calculez masa solutiei de acid, ms

ro=m/v---> ms= ro x v= 200g.....................d-,adevarat

-calculez masa de acid dizolvata

m=niuxM,acid= 1molx98g/mol=98g

-calculez concentratia procentuala,%

c= mdx100/ms= 98x100/200g=49g  ....................................a-adevarat  

-calculez concentratia molara

c,m= niu/V= 1mol/0,144l=6,9 mol/l                                 .....b-fals

-verific c

din ecuatia reactiei

2mol.............1mol

2NaOH+ H2SO4---> Na2SO4+H2O

se observa ca 1mol acid reactioneaza cu 2 moli baza

->m=niuxM,baza= 2molx40g/molL=80g=md--->  calculez ms

c=mdx100/ms---> ms= 80x100/40g= 200g...................c....ADEVARAT