Perhaps all 3 can depending on the temperature, but I purposely excluded any
statments about temp.  Assuming you were using ambient DI water, the sucrose
and CaCl3 will not completely dissolve.  In essence, you will have wet salt
and wet sugar.  Therefore, using the temp depression formulas are useless
because you cannot get a depression from a solid.

Glad you asked about the hydrated version of CaCl3.  The short answer is
that it does not matter.  Even if you were to take the 2 extra moles of H20
into account, you still have less particles in solution than sucrose and
more particles than ethylene glycol.

-----Original Message-----
From: TechNet [mailto:[log in to unmask]]On Behalf Of Brian Ellis
Sent: Saturday, March 19, 2005 2:54 AM
To: [log in to unmask]
Subject: Re: [TN] Answer to Friday's question


Sorry, you are wrong on two counts.
1) all three substances can dissolve in water at the concentrations
stated, depending on the temperature. However, the CaCl2 and sucrose
will precipitate out as you start to cool it down.
2) the max temp depression for a saturated sucrose syrup to freeze is
only about 4.9°C (hence the popsicle)

However, you did not specify whether the CaCl2 was hydrated or not. 10 g
of CaCl2.2H2O will obviously contain less CaCl2 than the dehydrated stuff!

Brian

Precision Analytical Lab wrote:
> Alright,
>
> First of all, that much sucrose or calcium chloride will not completely
> dissolve in that little of DI water.  So, the original question was a tad
> bit on the devious side.
>
> However, if you did use enough DI water to completely dissolve each of
those
> materials, they will begin to freeze in this order:  First to begin
freezing
> is the ethylene glycol (antifreeze), second will be the calcium chloride
> (Indiana's road salt), and last is the sucrose (sugar).
>
> Happy Friday!
>
> -----Original Message-----
> From: TechNet [mailto:[log in to unmask]]On Behalf Of Graham Naisbitt
> Sent: Friday, March 18, 2005 1:04 PM
> To: [log in to unmask]
> Subject: Re: [TN] Friday question
>
>
> Shawn
>
> You are what we call over here, a real stinker! Its Friday and I am not
less
> than 5 hours ahead of all you guys and now I will have to spend the entire
> week-end wondering about the true answer.
>
> My shot will be Calcium Chloride time because of the De-ionised water,
then
> sucrose unless the water is hot, then the diluted anti-freeze. I haven't a
> clue as to why, just gut feeling.
> --
> Regards Graham Naisbitt
>
> [log in to unmask]
>
> Golf quote of the week: If you watch a game, it's fun. If you play it,
it's
> recreation. If you work at it, it's golf.
>
> Concoat Limited - Engineering Reliability in Electronics
> A British Manufacturer
>
> NEW WEB SITE: www.concoat.co.uk :NEW WEB SITE
>
> Cell: 079 6858 2121
> Office: +44 (0)1252 813706
>
>
>
>
> On 18/3/05 1:38 pm, "Precision Analytical Lab"
> <[log in to unmask]> wrote:
>
>
>>This one's real fun.  It's sure to make blood shoot out your nose.
>>
>>Which of these 3 solutions will freeze first, second, and third and WHY
>
> will
>
>>they freeze in that order????
>>
>>1) 10 grams of Calcium Chloride (road salt) dissolved in 20 mL of DI
>
> water.
>
>>2) 10 grams of Sucrose (table sugar) dissolved in 20 mL of DI Water.
>>
>>3) 10 grams of Ethylene Glycol (antifreeze) dissolved in 20 mL of DI
>
> water.
>
>>
>>Shawn Parson
>>
>>Precision Analytical Laboratory
>>4106 Cartwright Drive
>>Suite A
>>Kokomo, IN  46902
>>Ph: (765) 455-1993
>>
>>Specializing in Ion Chromatography (IC) and Surface Insulation Resistance
>>(SIR)
>>
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