Hi linda,

Thank you for helping me math instruction yesterday. It was great

How about coming to my house in Sunday? We can do the homework at my home. 

Can you bring a notebook to do your homework in my house? We'll need to solve homework.

See you soon,

Pham

Fe+2 --->fe2+3 +1e    chất khử.                                  
Mn+7 + 5e  ---> Mn+2 chất oxi hóa
2feso4 + 5KMno4 + h2so4 ---> 2fe2(so4)3 + k2so4 + 5Mnso4  +  h2o

b)2fe+2----> fe2+3 +1e    Chất khử

Mn+7 + 5e --->Mn+2 chất oxi 

5feso4 + 2kMno4 + h2so4 ---> 5fe2(so4)3 +k2so4 + 2Mnso4 + h2o                                 
 

Tổng sp trừ chất đầu                                   
(-542,83+(2*-167,16))- (-795,0)=-82,15