Chemical Forums
Chemistry Forums for Students => Undergraduate General Chemistry Forum => Topic started by: walters on June 14, 2005, 06:53:35 PM
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What is it called in chemistry when im mixing liquids?
What is it called in Chemistry the sequence of putting the liquids a special order?
If i change the sequence/order of putting in the liquids in the cup/jar what is this called in chemistry?
What are some basic mixing techniques in chemistry?
I know this is different mixing techniques i just need to know the terms
or how to do these different mixing techniques?
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Try a google search mate, or the index in your text book.
be more specific and the chem genius's on this site will be able to point you in the right direction.
cheers,
madscientist
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when you mix two liquids, there might be a chemical reaction that poses a hazard to your safety.
eg. never add water to concentrated sulphuric acid. the hydration of sulphuric acid is exothermic and may create a hazardous sulphuric acid mist. instead, add concentrated sulphuric acid to water. the heat evolved from hydration is absorbed by the large volume of water, so no sulphuric acid mist is formed.
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When mixing is it called Homogeneous mixing and mixing the Emulsion layers
i think these are the terms can you guys explain more about
this homogeneous mixing and emulsion layering effects
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You have heterogenous mixtures also. And you have suspension although thats solids in liquids. Homogenous means that it's like one mixture. Heterogenous mixtures you can c different components of the it.
Ex.
Milk; When it's unhomogenized it seperates into cream and water. That wouldn't be a homogenous solution.
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What is suspension? although thats solids in liquids.
Homogenous means that it's like one mixture.
Heterogenous mixtures you can see different components of the it.
Whats the difference between a Homogenous mixers VS a Heterogenous mixture?
When i pour 5 different liquids in a Cup/jar is that Heterogenous?
How do i do Homogenous mixing?
How do i do Heterogenous mxing?
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Pictures help.
Homogeneous:
(https://www.chemicalforums.com/proxy.php?request=http%3A%2F%2Fwww.epa.gov%2Fsafewater%2Fconsumer%2Fglass.jpg&hash=7953ba64a3a82a7c649865fb7484cfdd547e1b6b)
Think clear, not colorless.
Heterogeneous:
(https://www.chemicalforums.com/proxy.php?request=http%3A%2F%2Fpatrick.wattle.id.au%2Fcameron%2Fcshs%2Fhammond%2Fweekend%2Fppt1.jpeg&hash=1dbf18459fd3f4a9b523a40fa54de1d2666f21ad)
Think cloudy. Also called a suspension.
When you mix something together in chem class, it's just called mixing. We're not that pretentious. You usually mix things together to make them react with each other and form a product. When you're mixing things together in a specific order, you're most likely doing several reactions to get to a specific product from specific reactants. You'll do this a lot in organic chem. Otherwise, I have no idea what you mean by mixing techniques.
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Homogenous emulsion layer?
Heterogenous emulsion layer?
Homogenous mixing- is clear and colorless
Heterogenous mixing? has color
What is the order/sequence called in chemistry?
The order/sequence of put the liquids in the cup/jar
It i switch the order/sequence the "result" is different why?
what is this called?
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An emulsion is a mixture of two immiscible (unblendable) substances.
colour is entirely dependant on the liquids used.
Benzene265 said not to think colorless. He also said cloudy, not has color.
so, homogenous is like water and salt (can mix)
heterogenous is like charcoal and water (cannot mix, charcoal particles float around giving a "cloudy" look)
For the order/sequence of putting liquids, there's no chemical name. we just state it in basic english. its not required for u to apply this, because u're dealing with physical reactions, not chemical reactions.
if u switch the order/sequence, the result MAY be different because of chemical reactions, but it may also be due to the "process" of how the mixture changes.
still, in the end regardless of the order/sequence, as long there are no chemical reactions, the product or result is the same.
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1.) If i put the liquids in order in a cup/jar
2,) then i toss the liquids in another cup/jar and turn it upside
down
3.) What happens? when i do this techique? it give a different
result why is that ? by tossing it and turning the cup/jar
upside down so the liquid mix alot from tossing it and turning it upside down they really mix and its looks really
different also why is that?
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It changed the order/sequence when i tossed the liquids
and its mixes them more why?
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that technique is basically stirring.
it looks very different than what u'll see when u pour it slowly, because the particles of the liquid(free-flowing) roll over each other due to your vigorous shaking and hence u'll see a evenly distributed mixture.
but like i said earlier, in the end there is no difference because the liquids will settle down and u'll see a lower layer of the denser liquid and an upper layer of the less dense liquid.
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Thanks xiankai alot for helping me out and your information
Mixing techniques:
stirring: What happens to the molecules and particles of the liquids
when im stirring?
Shaking: What happens to the molecules and particles of the liquids
when im shaking the jar/cup?
Tossing(into another jar/cup): What happens to the molecules and particles of the liquids when i Toss the liquids into another jar/cup?
When i toss the liquids into another jar/cup i see them overlapping and raising
and rearranging the order/sequence what is going on?
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since liquid particles/molecules have no fixed arrangement and hence are able to flow over one another, they can be easily moved around.
when u stir, u are moving the particles around.
when u shake, u are also moving the particles around.
when u toss, u are still moving the particles around.
the overlapping and raising and rearranging of the order/sequence is the action of denser liquids trying to sink down, and less dense liquids trying to float up.
after u have mixed the particles, they cant possibly stay as they are because heavy(dense) liquids cant be supported upwards by lighter(less dense) liquids
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Thanks so much Xiankai
when u stir, u are moving the particles around.
1.) Buts its moving paricles different then shaking it?
2.) its moving the particales diffferent then tossing it?
3.) how is it different?
when u shake, u are also moving the particles around.
1.) Buts its moving paricles different then Stiring it?
2.) its moving the particales diffferent then tossing it?
3.) how is it different?
when u toss, u are still moving the particles around.
1.) Buts its moving paricles different then shaking it?
2.) its moving the particales diffferent then Stiring it?
3.) how is it different?
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when u stir, u're moving the particles in any direction u stir.
when u shake, u're moving the particles up and down, or left to right depending on how you shake
when u toss, the particles move down, then churn around a bit.
u shouldnt really bother about this, but of course certain factors (dont shake it like a rock star) matters, so u dont spill the contents :P
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When the particles move in a liquid, no matter how you move them, they'll eventually mix together evenly. The mixing technique depends on the container. I'll stir if it's in a beaker, shake if it's in a test tube or volumetric flask, and swirl if it's in an Erlenmeyer flask. Just pouring one liquid into another will let them mix slowly by turbulence. This looks especially cool if you pour milk slowly into water.
If you're really interested in moving particles, do a google search on the Kinetic Molecular Theory and states of matter (like, liquid, for instance). This will also be in Gen. Chem textbooks, if you prefer to read paper.
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Thanks guys for the help this is some good information
i have one more topic about ice cubes
What happens when i put ice cubes in the jar/cup with 2 or 3 different kinds liquids? VS not having ice cudes and just the liquids whats the difference? what happens to the result? it changes the result?
What does the ice cudes do to the liquids?
Here is a tricky sequence/order:
"ice cubes (After) first liquid is pour into jar/cup"
1.) I put the liquid in the jar/cup
2.) I fill the jar/cup with ice cubes
3.) then i add the 2nd liquid
What happens here ? VS of just adding the ice cubes first and
fill the glass/cup/jar with ice cubes. The first liquid poured in first
before the ice cubes this changes the whole effect why? what
does adding the ice cubes AFTER the first liquid i pour VS
of just adding the ice cubes before ?
(Before) sequence/order ice cubes :
1.) Fill the glass/jar/cup with ice cubes
2.) add first liquid onto the ice cubes
3.) add the second liquid onto the ice cubes
Whats the difference between these 2 different sequence/orders?
Thanks guys for your time and information on helping me out
on this
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as before, the denser material sinks, the less dense material floats (which is why u often observe ice cubes floating on your drink, water expands when freezed)
the ice cubes, if they dont take part in any chemical reaction, will draw heat away from the liquids, because in the law of thermodynamics, all objects strive to lose/gain heat in order to attain the same heat as their surroundings.
depending on the time delayed in putting the ice cubes, the possible difference observed (excluding chemical reactions) is that the ice cube gets more time to cool down whatever is added before it (in the case of no liquids, the cup would be cooled down then)
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Mixing or stirring or whatever type of "motion" you set upon the liquids is basically you adding kinetic energy. If the liquids are miscible, it will increase the rate of solubilty. Kinda like stirring your hot chocolate after adding the powder, you are adding kinetic energy to let the powder dissolve quicker. Heat energy also increases solubility. This can be explained using the kinetic molecular theory. One thing though, general temperature vs. solubility trends vary for liquids, solids, and gases.
For the ice cubes, think about their density. Are they more dense or less dense than liquids? If you fill the cup with liquid first and then add the ice, would the ice float or sink? If you fill the cup with ice first and then add the liquid, where will the liquid go? Think in terms of displacement and volume.
The thermodynamic part of it would affect affect viscosity. What is the relationship between temperature and viscosity?