Question: how long does it take for baking soda to kill rats?
Answer: The answer is a lot! You cannot just put baking soda around and expect rats to eat it; they will smell it at a distance and then walk away. Not only, basically, you will need to give about 2 to 3 grammes of baking soda to a rat to kill it. And if the rat has the opportunity to recover, the effect will be gone.