The oxygen is dissolved in the solution; hence the methylene blue causes the solution to turn blue. As the reaction proceeds, the oxygen is consumed in the reaction as glucose is oxidised to form carbon dioxide and water and hence the solution goes colourless. As you reshape the flask, you dissolve more oxygen back into solution turning the solution blue again
@block10867 жыл бұрын
Nicholas Sanders
@minecraft_03866 жыл бұрын
The explanation was quite helpful to me. Thanks a lot
@couldntthinkofausername84115 жыл бұрын
I’m doing a worksheet on this video and your answer just saved us 5 minutes
@ilenelaugen50615 жыл бұрын
thank you for helping me with my science project
@rinckeric47414 жыл бұрын
so finally three is no oxygen in the enclosed flask,right?
@jaynahata3824 жыл бұрын
From where we can buy these things
@aloelane44246 жыл бұрын
How much of the materials are required?
@michaelsmaragdakis42724 жыл бұрын
This is not an equilibrium as Glucose in not reformed. By shaking the bottle you just help dissolve more oxygen (one of the reactants) in water. Since gases have very low solubility in water, only a small amount of oxygen may be in the solution at any time, it is consumed fast due to the catalyst and the color dissapears. Shaking speeds up the entry of more oxygen to the water, as if left to disolve while in calm it would react as soon as it disolved. Nice experiment but no equilibrium here, if only production of Glucose was that easy.
@noeliaskz3 жыл бұрын
La profe nos mando a ver este video,esta buenísimo jajajs gracias me salvaron de hacer el experimento :D
@hassanalkhalifah15655 жыл бұрын
Does table sugar work too?
@shahidmahmood704610 жыл бұрын
good presentation....really
@chemistrylecture65 жыл бұрын
Can we use caustic soda
@Robotnik75XYZ Жыл бұрын
What can I substitute glucose and potassium hydroxide with?
@pabitragurung44225 жыл бұрын
Can we use any Base beside koh
@shahinzerozero28737 жыл бұрын
can we use any other thing for methalyne blue
@rinckeric47414 жыл бұрын
methylene
@sarakarn10 жыл бұрын
Catalytic oxidation oxidation of glucose??? Is it the reduction of methylene blue by glucose in strong alkaline condition? when the flask was shaken, the oxygen in such system can re-oxidise the colorless form of reduced methylene blue to blue color???
@terminsane4 жыл бұрын
If this is sealed in a jar, how many times can it turn blue and back?
@imvuglitter63702 жыл бұрын
forever hence why it’s equilibrium
@kishorevenugopal6191 Жыл бұрын
@@imvuglitter6370 But if Oxygen is transformed into CO2, how can it still have Oxygen to change colour?
@keanguerra11468 жыл бұрын
What kind of glucose are you using?
@dayasharma80186 жыл бұрын
Kean Guerra c6h12o6
@johnrhodes3350 Жыл бұрын
The white powdery type😉
@arulmurugan47275 жыл бұрын
Can we use other indicators
@globgblobgabgalab2 жыл бұрын
i dont think you can because the glucose is reducing methylene blue solution andyou wont get the same blue color as you get with methylene blue. i havent tried the experiment yet but this is just my thoughts
@AJobScroller Жыл бұрын
What if we add phenol red along with methylene blue?
@dineshpokkath57797 жыл бұрын
It works
@linfan65964 жыл бұрын
Great job 👌👍👍
@dayasharma80186 жыл бұрын
It this a reversible reaction or not plzzz reply me
@s9scrxmsy4245 жыл бұрын
Yes
@themagiccorner75304 жыл бұрын
No
@russellgrant45443 жыл бұрын
It is not technically reversible. Methylene blue is reduced by glucose, which makes it turn colorless (called methylene white). The colorless methylene white can be oxidized back into methylene blue by oxygen. So, the methylene blue methylene white transformation is reversible in a sense. I wouldn't call it technically a reversible reaction because they are actually the result of two separate essentially irreversible reactions. The reaction between methylene blue and glucose along with the reaction between methylene white and oxygen are not reversible in this situation.
@ashishpandey56802 жыл бұрын
can I use NaOH in place of KOH???
@hibbahyawar1281 Жыл бұрын
yup
@dida82523 жыл бұрын
soo is this a chemical or physical change?
@johnrhodes3350 Жыл бұрын
chemical
@mromeroh14 жыл бұрын
HELP, question: I'm looking for a reaction where you start with color (any color is ok) and after a certain time, it becomes colorless. If possible I would like to do it with non-harmful chemicals, because it's going to be an experiment for primary school kids. -Start with a color (already set up in the container, if possible use non-harmful chemicals or natural products) -Add H2O and it becomes colorless -If possible, change the time it takes to become colorless based on the concentration of the initial chemicals/products -Use natural products or non-harmful chemicals, as it is an experiment for kids, primary school students. Thank you very much.
@ammugiri53633 жыл бұрын
😯😯😯😯Super 👌👌👌👌
@vinalangi27002 жыл бұрын
what happen it the flask was filled to the top with the solution
@donrowe101 Жыл бұрын
the driving reaction uses up oxygen (O2). when the O2 reactant is gone the reaction stops and no further color change will occur. with a fuller flask (less air, less oxygen) at the start the reaction will end sooner than when the flask contains more air, therefore more O2
@vinaynaral68728 жыл бұрын
how long does the reaction can proceed??
@nikolaus432114 жыл бұрын
@@vcuberx no, only as long as there is oxygen in the system.
@rudu3298 Жыл бұрын
@@nikolaus43211 is it turning blue because the oxygen in the water?
@abiloss1618 Жыл бұрын
Danke
@aparnasur8446 жыл бұрын
Fantastic♥
@Tamilselvi-cg7ik5 жыл бұрын
Please give chemical equation for this reaction
@noxusfumes36285 жыл бұрын
C6H12O6 + 6O2 ==> 6CO2 + 6H2O
@nikolaus432114 жыл бұрын
@@noxusfumes3628 wrong. the aldehyde gets oxidised to a carbon-acid.
@noxusfumes36284 жыл бұрын
@@nikolaus43211 You can clearly hear him saying this himself, that glucose reacts with oxygen in air to produce CARBON DIOXIDE and not some carbon acid, at 0:28
@nikolaus432114 жыл бұрын
@@noxusfumes3628 and its wrong. or can you see bubbles rising from carbon dioxide like in soda?
@noxusfumes36284 жыл бұрын
@@nikolaus43211 You do have a point. Now I tend to believe that the evolved CO2 remains dissolved in water as carbonic acid, H2CO3. What's your take on this?
@FrostyFlames245 жыл бұрын
🤘🏼🤘🏼🤘🏼🤘🏼🤘🏼🤘🏼🤘🏼🤘🏼🤘🏼🤘🏼🤘🏼
@marufahmad6555 жыл бұрын
From Bangladesh.....
@juvnchy5 жыл бұрын
Maruf Ahmad cool
@TechAger3 жыл бұрын
Thank you so much sir
@yousmell33215 жыл бұрын
I don’t understand why this is equilibrium... 😓
@taod014 жыл бұрын
It’s in a closed system and so the backwards reaction is the same as the forwards reaction
@quantumsteps Жыл бұрын
Pyar ❤️from india
@CleanyBeats3 жыл бұрын
CoOl
@improbabile10 ай бұрын
Guariscimi tutto anche l aids la lebbra i tumori la leucemia la sindrome psichiatrica e l aids oids e u mi chiamo Biagio di balsamo e famiglia