Pregunta B1?

A) K2Cr2O7 + HI → KI + CrI3 + I2 + H2O

Equilibrio iónico

<img src="https://tex.z-dn.net/?f=K%20_%7B2%7D%20%5E%7B%2B1%7D%20Cr%20_%7B2%7D%20%5E%7B%2B6%7DO%20_%7B7%7D%20%5E%7B-2%7D%20%2B%20%20H%20_%7B%7D%20%5E%7B%2B1%7DI_%7B%7D%20%5E%7B-1%7D%20%3D%5C%20%5Ctextgreater%20%5C%20%20K%20_%7B%7D%20%5E%7B%2B1%7D%20I%20_%7B%7D%20%5E%7B-1%7D%20%2B%202%20Cr%20_%7B%7D%20%5E%7B%2B3%7D%20I%20_%7B3%7D%20%5E%7B-1%7D%20%2B%20I_%7B2%7D%20%5E%7B-1%7D%20%2B%20H_%7B2%7D%20%5E%7B%2B1%7DO_%7B%7D%20%5E%7B-2%7D" />

Equilibrio molecular

<img src="https://tex.z-dn.net/?f=%20%5Cfrac%7B2%7D%7B2%7D%20%20K_%7B2%7DCr_%7B2%7DO_%7B7%7D%20%2B%20%5Cfrac%7B28%7D%7B2%7D%20H_%7B%7DI_%7B%7D%20%3D%3E%202%20KI%20%2B%202%20CrI_%7B3%7D%20%2B%202%20I_%7B2%7D%20%2B%20%20%5Cfrac%7B14%7D%7B2%7D%20H_%7B2%7DO%20" /> 2 KI + 2 CrI_{3} + 2 I_{2} + \ frac{14}{2} H_{2}O " alt = " \ frac{2}{2} K_{2}Cr_{2}O_{7} + \ frac{28}{2} H_{}I_{} = > 2 KI + 2 CrI_{3} + 2 I_{2} + \ frac{14}{2} H_{2}O " align = "absmiddle" class = "latex - formula">

b)KBr + H2SO4 → K2SO4 + Br2 + SO2 + H2O

Equilibrio iónico

<img src="https://tex.z-dn.net/?f=K%5E%7B%2B1%7D%20Br%5E%7B-1%7D%20%2B%20H_%7B2%7D%5E%7B%2B1%7DS%5E%7B%2B6%7DO_%7B4%7D%5E%7B-2%7D%20%3D%5C%20%5Ctextgreater%20%5C%20%20K_%7B2%7D%5E%7B%2B1%7DS%5E%7B%2B6%7DO_%7B4%7D%5E%7B-2%7D%20%2B%20Br_%7B2%7D%5E%7B%7D%20%2B%20S%5E%7B%2B4%7DO_%7B2%7D%5E%7B-2%7D%20%2B%20H_%7B2%7D%5E%7B%2B1%7DO%5E%7B-2%7D" />

Equilibrio molecular

<img src="https://tex.z-dn.net/?f=2%20KBr%2B2H_%7B2%7DSO_%7B4%7D%20%3D%20%5Cfrac%7B2%7D%7B2%7D%20K_%7B2%7DSO_%7B4%7D%2B%20Br_%7B2%7D%20%2B%20SO_%7B2%7D%20%2B%202%20H_%7B2%7DO" />

Prueba selectividad para la comunidad de Madrid.

Convocatoria Jun 2014 - 2015.

Química.