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Topic: What to do when Percipitating 2 chemicals together  (Read 5705 times)

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onesikgypo

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What to do when Percipitating 2 chemicals together
« on: August 08, 2005, 06:28:11 AM »
alright just a little help on questions where they start off like

"Balance the equation for the precipitation reaction between copper sulfate and barium chloride"

Now i know how to balance equations i just dont know about the "precipitation" part.

lol give use a lil head start   - copper sulfate = CuSO4
                                        -  barium chloride = BaCl (if im not mistaken)
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Blueshawk

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Re:What to do when Percipitating 2 chemicals together
« Reply #1 on: August 08, 2005, 08:45:59 AM »
Quote from: onesikgypo on August 08, 2005, 06:28:11 AM
alright just a little help on questions where they start off like

"Balance the equation for the precipitation reaction between copper sulfate and barium chloride"

Now i know how to balance equations i just dont know about the "precipitation" part.

lol give use a lil head start   - copper sulfate = CuSO4
                                        -  barium chloride = BaCl (if im not mistaken)

All they want you to know is that a solid will be formed.  that is what precipitating means...to form a solid from liquids.  I am not sure whether the BaSO4 or the CuCl2 is the precipitate though.

CuSO4 + BaCl2 --->  CuCl2 + BaSO4.

I think BaSO4 is slighlty soluble...so CuCl might be the precipitate.
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onesikgypo

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Re:What to do when Percipitating 2 chemicals together
« Reply #2 on: August 08, 2005, 04:43:04 PM »
so do you like just swap the endings around for the right part of the equation?
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Offline xiankai

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Re:What to do when Percipitating 2 chemicals together
« Reply #3 on: August 08, 2005, 10:42:08 PM »
BaSO4 is the precipitate. CuCl is dissolvable.

this kind of reactions are in general what u said, but this is only the case when a less soluble salt than the two regeants can be formed. likewise, BaSO4 + CuCl will give u nothing because BaSO4 is less soluble than the possible products.
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Offline Donaldson Tan

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Re:What to do when Percipitating 2 chemicals together
« Reply #4 on: August 10, 2005, 10:07:30 PM »
Quote from: xiankai on August 08, 2005, 10:42:08 PM
CuCl is dissolvable.

It's CuCl2, not CuCl.

Quote from: onesikgypo on August 08, 2005, 06:28:11 AM
Now i know how to balance equations i just dont know about the "precipitation" part.

Precipitation occurs because at least one of the products is insoluble in the solvent. In this case, the insoluble product is BaSO4.
« Last Edit: August 10, 2005, 10:10:46 PM by geodome »
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"Say you're in a [chemical] plant and there's a snake on the floor. What are you going to do? Call a consultant? Get a meeting together to talk about which color is the snake? Employees should do one thing: walk over there and you step on the friggin� snake." - Jean-Pierre Garnier, CEO of Glaxosmithkline, June 2006

charco

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Re:What to do when Percipitating 2 chemicals together
« Reply #5 on: August 11, 2005, 06:45:32 PM »
All reactions are fundamentally reversible but when two types of ion bond together more 'tightly' than the ions bond to the solvent then these ions are removed from the mix as a solid precipitate. This pulls the reaction to the right hand side (the side of the precipitate).

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