Why does soduim acetate freez faster than salt and sugar?

What do you mean? Why sodium acetate becomes solid faster than salt or sugar?

Sodium acetate solidifies at about in the whereabouts of 300 C and salt in the whereabouts of 800 C. On cooling, salt will 'freeze' first.

Noo lsn I was in skool while I'm doing my 3 exprmnts all of them was same amount of water the salt and sugar and soduim acetate but 1 exprmnt workd and other not :s I wna know why

But it turnd to be soduim got freezd 1 and the other didn't

Also, try to write in proper English. That being said...

So, you mean the solutions of sodium acetate, salt and water, each of three were in the experiment. As from then, I don't know what you did actually.

Did you add x masses of sodium acetate, salt and sugar each to separate y volumes of water? And the sodium acetate got cold?

Okay no 3 difrnt expirmnt 1 is salt 2 is sugar 3 is soduim acetate the soduim acetate +water the mas gave me11.47 4 sugar mass 8.67 and 4 salt mas -8.79 when I finshd my 3 expirmnt I put them in the fridge 4 2 hours on of them workd which is sodum acetate so I want to know why other did work they didn't freez

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What I want to know is why soduim acetate is faster than salt and suagr by frezing

Would u reply

Ok, I got an equation from Wikipedia (and I'll ask you again to write in proper English, not in text message. I had a hard time trying to 'decipher' that '4' was indeed 'for' and not a number in the masses)

T_{f(pure)} - T_{f(impure)} = K_f \times m_B

T_f(pure) is the freezing point of water (0 C)
T_f(impure) is the freezing point of the impure solution
K_f is a constant, so we'll not be looking into it.
m_B is the concentration of the solution.

Ok, that means that the freezing point of the impure solution is inversely proportional to the concentration of the solution.

- T_{f(impure)}\ \alpha\ m_B

The more concentrated, the lower will be the freezing point. Now, each compound will has its own dissociation (dissolving extent) in water. From that, I will guess that sodium acetate does not dissolve in water as readily as does salt or sugar, and hence will have a smaller concentration, meaning a higher freezing point.

But why within 2 hours the soduim acetate freezd while other still liquid

That also means that the other two have a much lower freezing point. Ok, let me make it like that:

Let's say sodium acetate freezes at -2 C, salty solution at -5 C and sugary at -7 C.

Your freezer can go down to -4 C

Hence, at -2 C the sodium acetate will start becoming solid while the other two are still liquid. At -3 C the sodium acetate is solid and the others still liquid and finally at -4 C, the situation doesn't change.

That doesn't make any sense tel me why it got freezd and other didn't

Can you tell me why that doesn't make any sense? I may be overlooking something, and if I do, what do you suggest?

I have phase 3 to submit cause that doesn't make sense to my expirment my whole question is why the soduim acetate got freezd and other didn't ? Why like it only took two hours to freez while other didn't

Because the mixture of sodium acetate has a higher freezing point that the other two, something that I'm saying for the third time.

Stop giving talking to me in that rude way and why the other two doesn't have high frezing point ?

I'm not being rude. I already told you those. Ok, I'll say it once more.

The other mixtures contain different compounds, which behave differently to water compared to sodium acetate. The salt mixture, for example, will behave in such a way that it will have a lower freezing point. The sugar mixture will behave some other way and will have yet another freezing point.

They all, however also depend on concentration. Both factors contribute to lowering the freezing point. It only happens that sugar and salt lower the freezing point more than sodium acetate.

Yes you are I don't get it I swear what can I write in my phase 3 why they didn't freez only soduim acetate did in a fster way within 2 hours only

Reply

Yes you are I don't get it I swear what can I write in my phase 3 why they didn't freez only soduim acetate did in a fster way within 2 hours only

I will again say that I told you the answer. Now, it's up to you to believe it or not.

I don't understand what you don't understand here.

Each compound is different! Each has a 'special' behaviour. A fact is a fact, and that cannot be changed!

So I will say that soduim acetate went faster and got freezd cause Because the mixture of sodium acetate has a higher freezing point more than the other two and Each compound is different! Each has a 'special' behaviour. A fact is a fact, and that cannot be changed!
Comments on this post
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You say:

Sodium acetate froze faster because the mixture of sodium acetate has a higher freezing point than the other two mixtures. The nature of the compound is such that it will not affect the freezing point of the mixture to the same extent as salt and sugar do to water.

Thanks I hope its right

Ans you soory 1 more thing what can I write 4 my conclusion?

That sodium acetate doesn't alter the freezing point of water as much as salt or sugar do. This can also explain why salt is used on roads to melt ice, as salt lower the freezing point of water, the ice would have a lower freezing point, so will be a liquid at cold temperatures.

While I still have no idea of the actual experiment; the purpose of it, etc, this is the best I can come up with.

Um... do you think it's a good conclusion 4 my expirment? Cuase sadoium acetate went faster

If you could post the whole question, with all the details of the experiment... I might come up with a better conclusion.

My question is why did the soduim acetate froze fast within 2hours well other didn't my expirmnt was comparing sugar, salt, and sodium acetate that which 1 will work faster and which one will freez that's my whole expirmnt and what happnd is 1 of them workd which is soduim acetate and now I have to explain in my phase 3 why soduim workd and went faster by frezing and other didn't

My question is why did the soduim acetate froze fast within 2hours well other didn't my expirmnt was comparing sugar, salt, and sodium acetate that which 1 will work faster and which one will freez that's my whole expirmnt and what happnd is 1 of them workd which is soduim acetate and now I have to explain in my phase 3 why soduim workd and went faster by frezing and other didn't

Can I have reply 4 my question?

My question is why did the soduim acetate froze fast within 2hours well other didn't my expirmnt was comparing sugar, salt, and sodium acetate that which 1 will work faster and which one will freez that's my whole expirmnt and what happnd is 1 of them workd which is soduim acetate and now I have to explain in my phase 3 why soduim workd and went faster by frezing and other didn't what can I write for my conclusion

I was not online. I had a tuition to go to.

I'm asking you for the whole thing, from the start. What are the procedures you had to follow, etc, so that I may have a better idea of what that question is driving at. Since you don't seem to be understanding what I'm asking you;

I think I'll go through the calculations.
So far, the only 'relevant' information I got was:
Solution of sodium acetate= 11.47 g
Solution of sugar= 8.67g
Solution of salt =8.79g.

Usually, the sodium acetate should be the last one to freeze, OK? Sugar should be the first one, then salt and lastly the sodium acetate.

Were the volumes of water equal? How much water was used?
How long did you wait until you put the solutions in the freezer?
What is the temperature of the freezer?
Where were the solutions? In test tubes? Cups?
How were you determining which solution froze first? Take them out and use a glass rod to see if it was solid or just look at them from the freezerr?

As you see, I need much more information.

Al of them in beaker the soduim acetate took 2 hours to freez other took 2 day and still they didn't freez in the fridge I don't know th temp of it although what you said sugar 1 then salt then soduim what I have is difrnt as you know soduim was the only one and the 1 one

Like every 1 in a beaker soory **

Still waiting for those:

How long did you wait until you put the solutions in the freezer?
What is the temperature of the freezer?
How were you determining which solution froze first?

Um 2hours 1 of them worked I don't know what temp but its not very high

Ok, I forgot to ask you to answer hjow much water and solutes were used in each case.

A more 'sensible' reason for your anomaly is that:
Sodium acetate trihydrate is endothermic upon dissolution in water. This means that your salt first got some moisture, then upon dissolution, absorbed heat and hence, it's temperature fell. You didn't wait for its temperature to reach room temperature, that of the other solutions and you put all three in the freezer. Since the solution of sodium acetate was already at a lower temperature, it was easier to go colder first, and hence froze.

That's only an idea of what happened. I'll tell you again, it will be good if you posted all what you did, from the very beginning, the steps that you were given in your question.

Thanku I submitd it ihope I get it right