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Topic: Acid Base Reaction  (Read 5641 times)

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Offline Hailey

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Acid Base Reaction
« on: April 12, 2007, 06:18:15 PM »
A 1.87 gram sample of Mg reacts with 80mL of a HCl solution whose pH is -.544  What is the pH of the solution after all the Mg has reacted, assume constant volume.

I have no idea how to work this problem.
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Offline Dan

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Re: Acid Base Reaction
« Reply #1 on: April 12, 2007, 07:46:31 PM »
what's the balanced equation for this reaction?
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Offline Hailey

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Re: Acid Base Reaction
« Reply #2 on: April 12, 2007, 09:42:47 PM »
That is the problem - I don't know
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Offline constant thinker

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Re: Acid Base Reaction
« Reply #3 on: April 12, 2007, 09:46:14 PM »
Start with what you have, the reactants.

Mg + HCl --> ?

I'll give you 2 hints as to what the products are.
It's a single replacement reaction.
You will have 2 products.
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Offline Hailey

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Re: Acid Base Reaction
« Reply #4 on: April 12, 2007, 10:15:24 PM »
I got the single replacement - but, I don't know what to do because I have two molarities on the left side and I don't know how to combine them or whatever to get variables on the right side
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Offline Borek

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Re: Acid Base Reaction
« Reply #5 on: April 13, 2007, 02:51:41 AM »
Please write your reaction equation. List both molarities you think you have on the left.
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Offline Hailey

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Re: Acid Base Reaction
« Reply #6 on: April 13, 2007, 07:44:12 AM »
.96Mmg    3.5MHCl
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Offline Dan

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Re: Acid Base Reaction
« Reply #7 on: April 13, 2007, 07:53:56 AM »
Start with the balanced equation, do not worry about the molarities yet, just get the chemical equation first.

If you don't know that the equation is, you can do a little research online.

eg. http://www.google.co.uk/search?sourceid=navclient&ie=UTF-8&rls=GGLJ,GGLJ:2006-34,GGLJ:en&q=magnesium+acid+reaction

So, what is the balanced equation.
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