I got this from a second grade test.
2006-09-04 20:08:59 · 11 answers · asked by Anonymous in Science & Mathematics ➔ Chemistry
The iron will still rust either in cold or warm water. But it takes longer in warm water.
2006-09-04 20:14:40 · answer #1 · answered by wacky_racer 5 · 0⤊ 0⤋
I noticed this when I left a cast iron pan immersed in warm water. It did not rust overnight (even once the water had cooled), but the pan does rust when I simply fill it with water (warm or cool) and allow much of it contact with air. The water slows the oxygen from making contact with the iron but speeds it up at the interface of water and air (because that's where the dissolving starts). I imagineit would rust faster in agitated water than still water, due to the increased oxygen created by agitation. This probably had something to do with why my pan didn't rust even after the water it was immersed in had cooled.
2006-09-05 03:48:40 · answer #2 · answered by Black Dog 6 · 0⤊ 0⤋
oxygen usually dissolve in water. when it is warmed, the dissolved oxyen evolves out and dissolves in atmosphere. U can also try this out through an experiment.
Materials required are : water, a glass beaker and a burner.
Procedure: heat the water in the beaker with the help of a burner. Do not let the water to boil.
Observation: Uwill find gas bubbles clinged to the surface of the walls of the beaker. These are nothing other than Oxygen and carbon-dioxide molecules.
In cold water it contains oxgen dissolved in it.
Since iron rusts in presence of moisture and air, and forms Iron oxide, it rusts faster in cold water as it will find Oxgen which helps in rusting. Wher as in warm water Oxygen is liberated and hence irontakes a longer peiod to get oxidised
2006-09-04 20:37:17 · answer #3 · answered by Anonymous · 0⤊ 0⤋
Iron will rust in either warm or cold water.
2006-09-05 01:53:58 · answer #4 · answered by bonksteronline 3 · 0⤊ 0⤋
Rust can only be formed in the presence of oxygen & moisture.
According to studies, the solubility of a gas in a liquid decreases with increase in temperature.
In warm water ,the increased temperature decreases the oxygen content in it and thus, rust is not formed.
2006-09-04 23:40:47 · answer #5 · answered by sweetgrace 2 · 0⤊ 0⤋
Cold water is rich in oxygen, unlike warm water. (The first thing you will notice upon boiling water is the dissolved oxygen bubbling out). Iron needs oxygen to rust (oxidation).
2006-09-04 20:17:42 · answer #6 · answered by king_gauth 1 · 0⤊ 0⤋
In warm water the molecules move quicker and are less attracted to elements other than themselves. Cold water: oxygen molecules bond to steel causing oxidation
2006-09-04 20:15:38 · answer #7 · answered by Anonymous · 0⤊ 0⤋
Cold water has more dissolved air. It is the air which actually oxidizes the iron.
2006-09-04 20:15:21 · answer #8 · answered by Anonymous · 0⤊ 0⤋
i think it does rust in warm water.
2006-09-04 20:14:18 · answer #9 · answered by -^-Smooth C-^- 4 · 0⤊ 0⤋
iron enjoys warm for rest. so no rust
2006-09-04 20:11:33 · answer #10 · answered by adraya 2 · 0⤊ 1⤋