Kpl 2.2

2.12

$Li$

b)
$Cu^{2+}$

c)
$Co$

d)
$Ba$

e)
$Fe$

$Au^{3+}$

2.13
b) ja c)

0 +I +II 0

$Ni\left(s\right)+2Ag^+\left(aq\right)\rightarrow Ni^{2+}\left(s\right)+2Ag\left(aq\right)$

0 +III +I 0

$3Ag\left(s\right)+Au^{3+}\left(aq\right)\rightarrow3Ag^+\left(s\right)+Au\left(aq\right)$

2.14
a) Tapahtuu

0 +III+IV-II +II+VI-II 0

$Fe\left(s\right)+CuSO_4^{2+}\left(aq\right)\rightarrow FeSO_4\left(aq\right)+Cu\left(s\right)$

b) Ei tapahtu
c) Tapahtuu

0 +I-I +IV-I +I

$Sn\left(s\right)+4HCl\left(aq\right)\rightarrow SnCl_4\left(aq\right)+2H_2\left(g\right)$