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Determina masa de NaOH care reactioneaza cu 2,52 g amestec echimolecular de fenol si metanol?
Ma ajuta cineva, va rog?


Răspuns :

-aflu cati moli de alcool si de fenol intra in reactie
M,CH3OH=32g/mo;
M,C6H5OH= 94g/mol
x (32+94)=2,52-----> x= 0,02mol

-alcoolul nu reactioneaza cu NaOH

1mol............1mol
C6H5OH + NaOH-----> C6H5ONa+H2O
0,02mol......0,02mol

m= nxM
m= 0,02molx (23gNa+16gO+1gH)/mol=..............................calculeaza !!!