Question

Sa se calculeze cantitatile de Na si H2O pentru a obtine 4g NaOH?

Answer 1

miu,H2O= (2gH+16gO)/mol= 18g/mol
miu,NaOH=(23gNa+16gO+1gH)/mol= 4og/mol

2mol       2mol         2mol......1mol
2Na  +   2H2O----> 2NaOH + H2
2x23g.....2x18g.........2x40g
y  .............x...............4
x= 4x18/40g H2O= ...................CALCULEAZA !
y= 4x23/40g Na=.......................CALCULEAZA!