How do I rust a rock???

Question

I'm doing an experiment where I need to cause the iron contained in a granite rock to rust. What can I do to optimize the probability of causing rust as quickly as possible?

Answer 1

1. Soak in water with a lot of salt (free ions) in it.
2. Heat the water and the rock (as hot as you'd like)
3. If you're allowed to break the rock, break into small pieces to maximize surface exposure.

Reasoning: Rust is the oxidation of iron, so we want to promote oxidation. We can do this in multiple ways. First, introduce free ions to allow for charge carriers to mobilize the reaction. Second, heat the rock, since reactions occur faster at higher temperatures. Third, increase the amount of iron exposed by maximizing surface area (breaking the rock). Thus, more iron will react overall. These three methods will maximize the primary aspects of oxidation. Good luck!

Answer 2

try a little murodite acid, but be very careful do not breath it or touch it very dangerous but itll rust rocks

Answer 3

granite im not sure but hemitite will rust if you scratch it and put water on it, put lemonjuice on your rock and see if that hastens rusting.

Answer 4

Let it sit in a shallow water. Sunlight will give it warmth.and speeds up the reaction.

Answer 5

try salt water. heavily salted....dipit in then leave it out in the air. then dip it again. i think you can search the web for an answer

Answer 6

water and salt work good with cars