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1. Cul es el pH de HCl 0,10 M y HC2H3O2 0,1 M? Cul de los cidos tiene un pH ms alto? Explicar. 2. Debe

1. Cul es el pH de HCl 0,10 M y HC2H3O2 0,1 M? Cul de los cidos tiene un pH ms alto? Explicar.

2. Debe cambiar la Ka de un cido dbil con su concentracin? Explicar.

3. Prediga el pH de las siguientes soluciones salinas.

0,10 M KCl

AlCl3 0,10 M

0,10 M KHCO3

0,10 M K2CO3

NH4Cl 0,10 M

4. Los siguientes pares de solutos, cuando estn juntos en solucin, actuarn como amortiguadores? Explicar. NaCl y HCl KF y HF HNO3 y KOH H3PO4 y NaH2PO4

5. Cul de los siguientes cidos (y su base conjugada) ser adecuado para preparar un tampn de pH = 3,2? Explicar. C6H5COOH, Ka = 6,5 10-5HN3, Ka = 2,5 10-5 HClO, Ka = 2,9 10-8

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