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Chemistry
Chemistry
Problem
In the laboratory,
MnO
2
\text{MnO}_2
MnO
2
is made by : a. heating Mn in
O
2
\text{O}_2
O
2
b. oxidising
Mn
2
+
\text{Mn}^{2+}
Mn
2
+
in air c. electrolytic oxidation of
MnSO
4
\text{MnSO}_4
MnSO
4
d. precipitating
MnO
2
\text{MnO}_2
MnO
2
from solution when performing titration of
KMnO
4
\text{KMnO}_4
KMnO
4
in alkaline medium
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