What will you feel when you rub Na metal and H2O in your fingers? what producted is responsible for this?
Please Explain..
Thank you!Thank you!Thank you!
(n_n)
Answer:
Well, scientifically that's the effect as mentioned by the others when you rub Na metal with a wet hand. Basically, you will feel intense pain and heat, the feeling just like touching a hot pan I guess. Lol~ This is because when Na react with H2O, a chemical reaction occured and this releases a lot of heat (an exothermic process). Hence, your hand will feel the heat and pain for Na and other alkaline metals are usually very reactive. So, do keep in mind not to play with such metals. Lol~
Generally, metals in Group 1 (Na, K) and Group 2 (Ca) can react with water even though it's cold water. As for Mg, it will only react with water when it is of high temperature or it is steam because it is less easier to be oxidised compared to Ca. Other metals might require water at room temperature or higher temperature in order for both to react. Metals such as plumbum, copper, silver and gold do not react with water at all disregarding whether it is of cold water or steam. This can be understood by analyzing the oxdation series. The higher the position of the metal in the oxidation series, the easier it reacts with water or other compounds. Not all metals displace hydrogen from acid, for example copper does not react with acid or displace hydrogen from acid. This can be predicted by referring to the oxidation series as shown below.
Potassium (K)
Sodium (Na)
Calcium (Ca)
Magnesium (Mg)
Aluminium (Al)
Zink (Zn)
Ferum (Fe)
Stanum/Tin (Sn)
Plumbum (Pb)
Hydrogen (H)
Copper (Cu)
Mercury (Hg)
Silver (Ag)
Gold (Au)
The ease of the metals to be oxidised decreases as we go down the oxidation series.
If you rub sodium metal in your fingers, you will feel acute pain, as the sodium produces intense heat when it extracts the water from your skin to form sodium hydroxide (lye), and just to add insult to injury, the hot lye attacks your burned flesh.
You'll also experience pain in your eardrums, largely due to the loud screaming you'll be doing.
Who in the world ever suggested rubbing sodium in your fingers? Such an idiot should be locked up where he won't harm others!
Basically, if you rub sodium metal and water in your fingers, your fingers burn.
Alkali and Alkaline metals (groups 1 and 2) react, sometimes violently, with water.
Magnesium doesn't need high temperatures to react with water, it does so at room temperature. Yes, it can produce H2 gas when in acidic solution.
As far as proving these things work? They're inherent properties of these metals.
I'm guessing here as I have never done this, but I suspect that you might feel a slight vibration and heat. The reaction between sodium metal and water will release hydrogen and produce sodiumoxide/sodiumhydroxide. The hydrogen will be released as a gas producing the slight vibration as it bubbles in the water coating and heat will be released as a byproduct of the (exothermic) reaction.
On the rest I think you are correct. To prove it one would sample the released gas and analyze it. A simple flame and ember test is good start when testing for hydrogen.
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