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Question:

Rusting of iron nails in test tubes - please read below?

For each of the below, what would be the result:slightly rusty, rusty, very rusty or no rust?gt; An iron nail in distilled water gt; An iron nail in tap water (which has been boiled to remove dissolved gases) gt; An iron nail and a chemical to absorb water vapourThanks

Answer:

No, it will just make your wallet significantly lighter though.
This is stupid. You're driving a V6 and acting like you're an underground racer from Fast and Furious.
No the iron nail won't rust with the aid of fact the anhydrous calcium chloride will soak up all of the moisture of the attempt tube. Anhydrous calcium chloride is dry powdered calcium chloride.
Cold Distilled water would react less with the iron than the boiling water (heat causes it to rust faster, think exhaust on cars). The iron and water absorbing would be less rusty/not rusty at all
An Iron nail in distilled water Slightly rusty, Distilled water is pure with no dissolved minerals so current in the oxidation cell where rust would occur is minimal. An Iron nail in Boiled tap water Slightly rusty, less dissolved oxygen due to the boiling means less available to form the Iron oxide An Iron nail and water absorbing chemical no rust, Rust occurs mainly when iron slowly combines with the oxygen from moist air, no moisture no rust.

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