WHY IS AIR CONSIDERED A MIxTURE??

Question

WHY IS AIR CONSIDERED TO BE A MIXTURE? aND ALSO, IF I WANTED TO SEPERATE NITROGEN AND OXYGEN FROM EACH OTHER, HOW COULD I aCCOMPLISH THAT TASK??( THIS IS H.W. PPL PLZ HELP!)THANKS

Answer 1

Yes Air is a mixture. Air got its state from the gases really there is no gas called air. Oxygen, Nitrogen, many inert gases and some poisonous gases make air. But nitrogen is a main component of air. It is of 70% and oxygen is next then comes corbondioxide and other inert gases which are of very less ammount when compared with nitrogen and oxygen. Actually we can extract oxygen and nitrogen from the air in many scientific ways.

Nitrogen can be prepared from air by passing air through solution of caustic soda to remove carbon dioxide.

2 NaOH + CO2 --> Na2CO3 + H2O



And The gas stream is passed over heated copper turnings which removes the oxygen.

Cu + O2 --> 2 CuO

However, when nitrogen is prepared by this method, the gas is somewhat impure due to the presence of traces of the inert Nobel Gas (these are called noble gases or inert gases because they dont react with other gases in normal temperature), which are also present in the atmosphere.

Nitrogen may also be prepared by the decomposition of compounds containing nitrogen.


NH4NO2 --> N2 + 2 H2O

Answer 2

Air is a mixture. It's comprised mostly of Nitrogen, roughly 78%, Oxygen at 21% and the remaining 1% split between various other gases, such as Carbon Dioxide, Methane, Ozone and a few others. Of course, this is what I learned many years ago. Given the rise of pollution and industry, Oxygen levels may have dropped slightly, while Carbon Dioxide increased.

If you were to compress the air into liquid form, nitrogen and oxygen would seperate, with one floating on top of the other. Nitrogen would be the upper level, as it has a lower atomic weight than Oxygen.

Answer 3

Air is considered a homogenous mixture because, You can find that, the gases present do not react chemically . It is a homogenous mixture sice u find a set of ratio of substances present. Oxygen = 21%. Nitrogen = 78%.
Air is first compressed more than the atmospheric pressure. Then, when it is let it into a fine jet, it expands to form liquid air.
this air contains Nitrogen and Oxygen. these are seperated by Fractional distillation.

Answer 4

It is a mixture of things - not just gases you mentioned but water and suspended particulate matter as well.
If you wanted to separate oxygen and nitrogen from each other, you would look at an oxygen concentator to get oxygen off. It is an adsorbant gel that picks up oxygen from the air. Nitrogen can have the same sort of thing.

Answer 5

Air is considered to be a mixture because it isn't an element, or a compound.

Don't do any of that whacked out stuff to separate the nitrogen from the oxygen; use activated carbon 5A as an adsorbant, you'll get about 95% pure oxygen, and you'll be able to recover around 97% of the nitrogen. For most applications, the carbon dioxide/argon/other suff content isn't high enough to worry about.

Answer 6

Because thats what it is. Air is a mixture of Nitogen (78%), Oxygen (20%), Carbon Dioxide, Water (as water vapour) and a whole bunch of other stuff in small amounts like minute particles such as dust and other gases like carbon monoxide and sulphur dioxide.

On an industrial scale, Nitrogen is made by liquefaction of air and fractional distillation of the resulting liquid air at about -183°C) to separate out nitrogen (the main product) and other gases.

Answer 7

True air is considered a mixture of gases because air itself is not a gas but numerous gases join forming air. You can seperate Nitrogen from Oxygen by passing atmospheric air through NaOH solution and heated copper turnings to remove carbondioxide and oxygen respectively.

Answer 8

There are no chemical bonds between the Oxygen and Nitrogen in air, (the main components of air). Industrially this is done by fractional distillation of liquid air. On the small scale it would be easier to prepare Oxygen and Nitrogen separately.

Answer 9

Air is a mixture because it is composed of many gases including NItrogen, Oxygen Carbon Dioxide etc...

There is a test called the Kjeldahl apparatus that can be used to separate and quantify the gases using a gas chromatograph.

Gas Volume
Nitrogen (N2) 780,840 ppmv (78.084%)
Oxygen (O2) 209,460 ppmv (20.946%)
Argon (Ar) 9,340 ppmv (0.9340%)
Carbon dioxide (CO2) 381 ppmv
Neon (Ne) 18.18 ppmv
Helium (He) 5.24 ppmv
Methane (CH4) 1.745 ppmv
Krypton (Kr) 1.14 ppmv
Hydrogen (H2) 0.55 ppmv

Answer 10

Air as referring to the the atmosphere is a mixture of gases. An individual gas isn't air.