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  LiveWire / Teen Forums / Science & Business / Viewing Topic

How do you know if a substance is soluble or not? By the name
Replies: 7Last Post May 26, 2008 7:37am by Sachacohen2
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( Sachacohen2 )


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How do you know if a substance is soluble or not? I mean if it ends in oxide/carbonate/hydroxide/if a an alkali metal is present??? I'm not sure

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3:45 pm on May 25, 2008 | Joined: Dec. 2007 | Days Active: 320
Join to learn more about Sachacohen2 England, United Kingdom | Female | Posts: 1,496 | Points: 5,029
Cyanide666


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I can try and get you a solubility chart, for points.

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3:47 pm on May 25, 2008 | Joined: Nov. 2007 | Days Active: 120
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WaterMolecules


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My chemistry is a little rough, but it all comes down to polarity. If the molecule is polar, it will be soluble. You will need to remember which kinds of compounds are polar. The only one I can remember off the top of my head are oxides. They are definitely polar.

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3:47 pm on May 25, 2008 | Joined: Aug. 2006 | Days Active: 267
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( Sachacohen2 )


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Quote: from WaterMolecules at 3:47 pm on May 25, 2008

My chemistry is a little rough, but it all comes down to polarity. If the molecule is polar, it will be soluble. You will need to remember which kinds of compounds are polar. The only one I can remember off the top of my head are oxides. They are definitely polar.

what does polar mean?

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3:49 pm on May 25, 2008 | Joined: Dec. 2007 | Days Active: 320
Join to learn more about Sachacohen2 England, United Kingdom | Female | Posts: 1,496 | Points: 5,029
AlexRox


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If an element is polar, it's got a strong charge on one side, and a weak one on the other, this difference in pull allows also polar molecules to essentially rip it apart.

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3:54 pm on May 25, 2008 | Joined: May 2008 | Days Active: 14
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AlexRox


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http://boomeria.org/chemlectures/textass2/tableA-7.jpg

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3:56 pm on May 25, 2008 | Joined: May 2008 | Days Active: 14
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blufindr


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look at the structure of the formula. as a general rule, if it's a linear/tetrahedral/funny-looking one that's like the mercedes logo, it's not dissolvable.

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4:13 am on May 26, 2008 | Joined: April 2008 | Days Active: 316
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( Sachacohen2 )


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Quote: from AlexRox at 3:56 pm on May 25, 2008

http://boomeria.org/chemlectures/textass2/tableA-7.jpg

thanks just what i was looking for

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7:37 am on May 26, 2008 | Joined: Dec. 2007 | Days Active: 320
Join to learn more about Sachacohen2 England, United Kingdom | Female | Posts: 1,496 | Points: 5,029
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