Dear Anna,

Thank you for your lovely message. I'm so happy to hear you're enjoying the book. I'd be delighted to join you this Sunday and do some cooking together.

Of course, I’ll bring some fresh mangoes from the garden. Looking forward to a fun and healthy cooking session!

Warm regards,
Linda

a. Fe + HNO3 $\to$ Fe(NO3)3 + NO + H2O

Chất khử : Fe

Chất oxi hóa : HNO3

QT oxi hóa : Fe⁰   -->    Fe⁺³    +    3e    (nhân 1)

QT khử       : N⁺⁵   + 3e   -->  N⁺²          (nhân 1)

 Fe +4 HNO3 $\to$ Fe(NO3)3 + NO +2 H2O

b. KMnO4 + FeSO4 + H2SO4 $\to$ Fe2(SO4)3 + MnSO4 + K2SO4 + H2O.

$\to$

  Chất khử :  FeSO₄

  Chất oxi hóa : KMnO₄

   Qt oxi hóa : 2. Fe⁺²   --> 2.   Fe⁺³  +2.  1e

 QT khử   :    Mn⁺⁷   -->    Mn⁺²    +   5e

2 KMnO4 +10 FeSO4 + 8H2SO4 →→   5Fe2(SO4)3 +2 MnSO4 + K2SO4 +8 H2O.