Question

calcula al masa de hidróxido de calcio Ca(OH)2, necesaria para reaccionar con 16,5 g de ácido clorhídrico, HCl

Answer 1

                 Ca(OH)2 + 2HCl →  CaCl2  +  2H2O

Mm Ca(OH)2 =  74 g/mol
                HCl = 36.4 g/mol


g Ca(OH)2 = 16.5  g HCl  x  1 mol HCl  x  1 mol Ca(OH)2  x 74 g Ca(OH)2
                                             ``````````````    ``````````````````````    ```````````````````
                                              36.4 g HCl         2 mol HCl        1 mol Ca(OH)2

g = 16.77 g de Ca(OH)2