help with analyzing redox reaction

Question

Bi(OH)3 + 3Si+ 6OH-4Bi + 3SiO32-+ 9H2O name the element oxidized?

name of the element reduced?

formula of the oxidizing and reducing agent?

Answer 1

Look at oxidation no. of each element on the left and right of the equation and see if it changes.

Bi goes from 3+ to zeo. It has gained electrons. It has been reduced.

Si goes from zero to 4+. It has lost electrons. It has been oxidized.

Oxidizing agent = Bi(OH)3

Reducing agent = Si