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© Hachette Livre – H Prépa / Optique, 1 re année, MPSI-PCSI-PTSI –La photocopie non autorisée est un délit<br />

652<br />

Corrigés<br />

13<br />

1) AgNO 2 = Ag + + NO – 2<br />

a) s = = 2,7.10 –2 mol.L –1 .<br />

b) NO – 2 est une base très faible (pK B = 10,7), sa réaction<br />

avec l’eau est très limitée [HNO 2]

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