Chemistry- Reducing Agents

A substance acting as a reducing agent is oxidised in the process

Potassium Iodide (KI)

colourless to brown

KI reason

I2 is produced

Iron (II) salts

pale green to yellow

Iron 2 salts razon

Due to green Fe² ion going to yellow Fe³ ion

Conc HCl

green/yellow gas evolved

HCl razon

chlorine gas is produced

Hydrogen Sulfide/ H2S

yellow precipitate is formed

H2S razon

Sulfur is produced

Carbon, CO, H2

also reducing agents