Hi Anna,

What a lovely idea! I’m so glad you’re enjoying the healthy cooking book I lent you – it really is full of delicious and nutritious recipes. I’d be thrilled to come over on Sunday and try out a few dishes together. It’ll be so much fun to experiment with new recipes!

I’ll definitely bring some fresh mangoes from the garden. They’re ripe and ready, so we’ll have the perfect ones for the recipe you have in mind. I’m sure whatever we cook will be delicious, and I can’t wait to spend the day with you.

See you soon!
Linda

a) Fe + HNO₃ → Fe(NO₃)₃+ NO + H₂O

chất khử : Fe

quá trình oxh : Fe⁺⁰ → Fe⁺³ + 3e 

chất oxh : N 

quá trình khử : N⁺⁵ + 1e → N⁺⁴

1*( Fe⁺⁰ → Fe + 3e)

3* ( N⁺⁵+ 1e → N⁺⁴ )

=> 3Fe + 4HNO₃ → Fe (NO₃)₃+ NO + 2H₂O 

b) KMnO₄+ FeSO₄ +H₂SO₄ → Fe₂(SO₄)₃ + MnSO₄ + K₂SO₄ + H₂O

chất khử : Fe 

quá trình oxh : 2Fe⁺² → 2Fe⁺³ + 2e

chất oxh : Mn

quá trình khử : Mn⁺⁷ + 5e → Mn⁺²

5* ( 2Fe⁺² → 2Fe⁺³ + 2e)

2* ( Mn⁺⁷+ 5e → Mn⁺²)

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