Question

197. Corrosion is A physical phenomenon A chemical phenomenon Same as erosion An uncontrollable phenomenon 

          197. Corrosion is
A physical phenomenon
A chemical phenomenon
Same as erosion
An uncontrollable phenomenon

Added by Tony R.

Chemistry: Structure and Properties
Chemistry: Structure and Properties
Nivaldo Tro 2nd Edition
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197. Corrosion is A physical phenomenon A chemical phenomenon Same as erosion An uncontrollable phenomenon
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Transcript

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00:01 Hello student so in problem 30 of chapter 18 chemistry of heavier elements metallurgy so in this question corrosion is basically a so corrosion is basically a altered reaction in presence of water it is the altered reaction in presence of water so corrosion is basically a chemical change so metals are eaten up by the action of air water or moisture on their surface for example rusting of iron we have iron plus oxygen plus water say x balls of water are used in this case and what we get we get fe 203 dot x h2o which is known as a rust okay so we can balance this equation now so for fe 3o2 xh2 that will form twice of fe 2 .03 .xh2 .o .3.
01:14 Okay.
01:15 So, rust, this is from the rust.
01:17 So, rust is the hydrated form of, as you can see, water is present, hydrated form of ferric oxide...
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