Blended learning is a way of studying a subject, which face to face learning and brings several benefitsh to us.First, blended learning helps us have more control over own learning.Learning materials are available at all times online .Second, we can develop better communication and teamwork skills in a blended learning class .Finaly, blended learning methods allow for greater personalization , because they help learers choose their approach. In short, it is very convenient for teachers and students.

v= -1/1×(0,10-0,22)÷4 = 0,03

a) 2KMnO4 +16HCl—> 2KCl +2MnCl2 +5Cl2 +8H2O

•Chất khử :HCl

•Chất oxi hóa :KMnO4

•Quá trình oxi hóa :2Cl‐¹ —>Cl²+2e

•Quá trình khử :Mn+⁷ +5e—> Mn+²

b) m(KMnO4)= 0,1×158 =1,58