Răspuns:
Na reactioneaza cu apa si rezulta o solutie formata din NaOH FORMAT SI RESTUL DE APA CE NU A INTRAT IN REACTIE
-CALCULEZ moliNa si moliH2O, stiind M,Na= 23g/mol M,H2O=18g/mol
niu=m/M= 10g/23g/mol= 0,43molNa
niu=50g/18g/mol=2,77molH2O
-din ecuatie, deduc moli obtinuti NaOh si moli apa ramasi
2mol.......2mol................2mol
2Na + 2H2O----> 2NaOH + H2
0,43mol...x=0,43mol....y=0,43mol
mol apa ramasa : niu= 2,77-0,43=> 2,34mol
niuNaOH + niu,H2O= 2,77MOL
2,77mol total........0,43molNaOH.........2,34molH2O
100mol.....................x.....................................y
Explicație:
X=15,5% NaOH
Y= 84,5% H2O
