Reduction of copper oxide

You can find instructions for this experiment at www.rsc.org/learn-chemistry/re...
Copper(II) oxide can be reduced by hydrogen and its formula determined. Natural gas (mainly methane) can also be used as a reducing agent, but the reaction is much slower.

[@kleetus92]

One very important thing to remember when dealing with pressure regulators on tanks like these.... NEVER stand in front of the adjusting screw when opening the main valve. Many have torn the threads out and shot the end off like a rocket... If you're standing there looking at it, you'll catch it with your face. Not good. Ask any professional welder for verification. Good video though!

[@sadashivsule7207]

Very useful for chemistry student thank you

[@DougsLab]

@ Cullen - How is it inaccurate? He is within 2.44% of the theoretical value.

[@MrMexijorge]

Excelent video, many thanks

[@s.a.c.h.u7600]

In this same method is that possible to reduce gold and aluminium oxides

[@TheCerberusInferno]

why not to use carbon to reduce copper ? its safer

[@carolsmall992]

Doesn't look anything like the sheets of copper I can buy from B&Q - looks more like the dust I get out of my vacuum cleaner.

[@nikushim666]

"this valve is the pressure reduction valve" That is a regulator, the main valve regulates the output pressure., If you intend to use any form of flow restriction. A flowmeter should be installed onto the manifold. (when dealing high pressure cylinders such as hydrogen, a double regulator manifold should be used)

[@shikinkern]

Is it possible to use reaction between metal and hydrochloric acid to produce hydrogen gas instead of using hydrogen gas tank. If possible, is it hard to carry out the activity?

[@chasriner]

+Cikgu Shikin Yes, I have done so using a hydrogen generator with either HCl or H2SO4 and mossy zinc. And, if one doesn't have an explosion shield, one can cover the hydrogen generator and most of the apparatus with a lab apron or plastic sheeting until the hydrogen escaping the ignition tube is lit. You can also get good results with silver oxide.

[@shikinkern]

chasriner Tq for information. I will try to do it.

[@h539279549]

Can anyone tell me why did the powder turn pinkish? Shouldnt it be orange?

[@Cyberw4y]

Brian Chan Copper has an inherent pink hue. It only turns orange when it's under incandescence or if it's the compound cuprous oxide.

[@abhidabest]

Why does the colour change to pink.. isn't pure Copper reddish orange.

[@damonjackson5857]

Abhishek Dasmunshy no copper is pinkish red if it's orange it has a little oxide on it. if you take a dirty penny and dip it in HCl, you will see that it dissolves only the oxide and leaves you with a pinkish looking penny

[@damonjackson5857]

Abhishek Dasmunshy no copper is pinkish red if it's orange it has a little oxide on it. if you take a dirty penny and dip it in HCl, you will see that it dissolves only the oxide and leaves you with a pinkish looking penny

[@m0w0ss]

the sound is corrupted...

[@coyote_comicsanimated8240]

Honestly this is pretty hot

[@rajheman6]

what type of glass text tube you uesd in this experiment ? is it borosil glass test tube or qurtz glass test tube ? as i knowns brosil glass with stand upto 450°C only. melting point of copper oxide is 1,326 °C

[@chasriner]

+Raj Heman I have used a pyrex or Kimax tube.

[@Camroc37]

I don't believe it ever becomes molten. Just hot enough to separate the Oxygen from the Copper.

[@danwoodward23]

Nothing exploded

[@naomisaxton-knight3176]

Is that you Ted?

[@naomisaxton-knight3176]

My old Chemistry teacher!

[@LukaMc99]

Is that you Snoop Dogg?

[@user-oc5fp5hf9p]

HABS ANYONE??

[@create_consume]

Major lack of efficiency, along with the subjective variable for hydrogen....how is this science?

[@create_consume]

That's an inaccurate measurement of copper oxide for someone who is so royal