Question

When the equation HCl + MnO2 → MnCl2 + H2O + Cl2 is balanced, what is the coefficient for HCl? Question 6 options: 2 3 1 4

Answer 1

HCl + MnO2 → MnCl2 + H2O + Cl2
To balance this reaction, we have to have an exact number of electrons of each element on both sides. So it will turn into:

4HCl + MnO2 → MnCl2 + 2H2O + Cl2

From that, we could see that the coefficient for the HCL is 4.