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Author Topic: MgSO4 + H2SO4 what does it yield  (Read 15330 times)

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kivine

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MgSO4 + H2SO4 what does it yield
« on: August 23, 2004, 02:52:40 AM »

MgSO4 + H2SO4  what does it yield?

haf tried to search the net for this equation but to no avail. did the experiment. got an exothermic one.


thanks
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budullewraagh

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Re:MgSO4 + H2SO4 what does it yield
« Reply #1 on: August 23, 2004, 03:38:34 AM »

it was probably just the Mg and SO4 bond being broken.  the two cannot react.
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kivine

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Re:MgSO4 + H2SO4 what does it yield
« Reply #2 on: August 23, 2004, 03:59:38 AM »

well, here is the instruction of the experiment

Place a pea-sized amount of Epsom salts , MgSO4 in a small, clean test tube that has been rinsed with distilled water.

Add 1-2 drops of 18M sulfuric acid.Descibe your observations.
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budullewraagh

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Re:MgSO4 + H2SO4 what does it yield
« Reply #3 on: August 23, 2004, 04:19:34 AM »

18M H2SO4 would break the bonds reeeeal easily.  that's what it is.
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ssssss

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Re:MgSO4 + H2SO4 what does it yield
« Reply #4 on: August 23, 2004, 05:08:51 AM »

Well if it would have been any halogen then the a displacemoent reaction could have been occured But since SO4 is attached with Mg it could not be replaced by another SO4 of Sulphuric acid.
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Re:MgSO4 + H2SO4 what does it yield
« Reply #5 on: August 23, 2004, 06:25:35 AM »

It's probably just an acid/base reaction.  The SO42- from the MgSO4 gets protonated to form a bisulfate anion, HSO4-.
« Last Edit: August 23, 2004, 06:26:17 AM by movies »
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kivine

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Re:MgSO4 + H2SO4 what does it yield
« Reply #6 on: August 23, 2004, 07:01:46 AM »

correct me if i'm wrong

does it give to this:

Mg(HSO4)2

magnesium(II) bisulphate?


oh, btw. my observations:

exothermic, no change in color. i cant confirm whether there are bubbles or not.forgot abt it ???
« Last Edit: August 23, 2004, 07:04:42 AM by kivine »
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Re:MgSO4 + H2SO4 what does it yield
« Reply #7 on: August 23, 2004, 03:32:15 PM »

There's a fair amount of water in H2SO4, so I would think that it would stay in solution.  Did you observe any precipitates?
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AWK

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Re:MgSO4 + H2SO4 what does it yield
« Reply #8 on: August 23, 2004, 09:17:52 PM »

If you use a concentrated sulfuric acid then magnesium hydrogen sulfate can be formed, but unfortunately, it can be more soluble in water than the magnesium sulfate itself.
So nothing is observed, except some heat due to dilution of sulfuric acid.
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kivine

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Re:MgSO4 + H2SO4 what does it yield
« Reply #9 on: August 24, 2004, 04:37:41 AM »

sorry, but how does the dilution of sulfuric acid brings about an exothermic reaction?


movies: no ppt
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Re:MgSO4 + H2SO4 what does it yield
« Reply #10 on: August 24, 2004, 02:58:19 PM »

I think the heat comes from the acid/base reaction.  There could be some heat produced from dissolving the MgSO4 as well.

If you're diluting sulfuric acid you get heat from the acid/base reaction with water as the base.  Same sort of thing, just a different base.
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kivine

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Re:MgSO4 + H2SO4 what does it yield
« Reply #11 on: August 25, 2004, 03:43:30 AM »

perhaps an equation?
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Re:MgSO4 + H2SO4 what does it yield
« Reply #12 on: August 25, 2004, 08:22:34 AM »

H2SO4(aq) + MgSO4(s) --> Mg2+(aq) + 2 HSO4-(aq)

By the by, anhydrous MgSO4 will produce heat even if it's just mixed with water.
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kivine

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Re:MgSO4 + H2SO4 what does it yield
« Reply #13 on: August 26, 2004, 05:52:02 AM »

does the above equation produce heat?
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Re:MgSO4 + H2SO4 what does it yield
« Reply #14 on: August 26, 2004, 09:39:56 AM »

Ought to.  Most acid/base neutralizations do.
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