June 04, 2020, 02:12:01 AM
Forum Rules: Read This Before Posting


Topic: Silver and Sulfuric Acid  (Read 47925 times)

0 Members and 1 Guest are viewing this topic.

Offline billnotgatez

  • Global Moderator
  • Sr. Member
  • ***
  • Posts: 3977
  • Mole Snacks: +213/-56
  • Gender: Male
Silver and Sulfuric Acid
« on: June 17, 2004, 08:03:11 AM »
Will Silver and Sulfuric Acid react the same way as Zinc and Sulfuric Acid?

Offline AWK

  • Retired Staff
  • Sr. Member
  • *
  • Posts: 7321
  • Mole Snacks: +514/-86
  • Gender: Male
Re:Silver and Sulfuric Acid
« Reply #1 on: June 18, 2004, 02:59:12 AM »
No, but silver reacts with hot concentrated sulfuric acid aacording to equation
2Ag + 2H2SO4 = Ag2SO4 + 2H2O
AWK

Offline billnotgatez

  • Global Moderator
  • Sr. Member
  • ***
  • Posts: 3977
  • Mole Snacks: +213/-56
  • Gender: Male
Re:Silver and Sulfuric Acid
« Reply #2 on: June 18, 2004, 07:51:03 AM »
That is interesting since Hydrochloric Acid and Zinc give off hydrogen and Zinc Chloride.

Thus I have assumed Sulfuric Acid and Zinc gave off hydrogen and Zinc Sulfate.

But you are saying no Hydrogen is created when using Silver and Sulfuric Acid at a high temp.

Interesting

Offline jdurg

  • Banninator
  • Retired Staff
  • Sr. Member
  • *
  • Posts: 1366
  • Mole Snacks: +106/-23
  • Gender: Male
  • I am NOT a freak.
Re:Silver and Sulfuric Acid
« Reply #3 on: June 18, 2004, 08:02:25 AM »
If you look at the activity series of metals, you'll see that silver is towards the bottom of that list.  It is not able to reduce the hydrogen ions in a sulfuric acid solution to hydrogen gas, and thus become oxidized to the Ag+ ion.  It's only at a high temperature that the strong oxidation powers of concentrated sulfuric acid is able to oxidize the silver metal.  If you take concentrated hydrochloric acid and heat it up and throw some silver in there, nothing will happen as hydrochloric acid is not nearly as strong an oxidizer as sulfuric acid is.  With nitric acid, it's such a strong oxidizer that you don't even need to be at elevated temperatures to dissolve silver.

« Last Edit: June 18, 2004, 08:03:03 AM by jdurg »
"A real fart is beefy, has a density greater than or equal to the air surrounding it, consists

Offline AWK

  • Retired Staff
  • Sr. Member
  • *
  • Posts: 7321
  • Mole Snacks: +514/-86
  • Gender: Male
Re:Silver and Sulfuric Acid
« Reply #4 on: June 20, 2004, 07:12:50 AM »
But you are saying no Hydrogen is created when using Silver and Sulfuric Acid at a high temp.

Interesting

I did not say this. I only said that silver and sulfuric acid could react.
From reaction you can see above,  this is due to a reduction of sulfuric acid do SO2.
Other metals can also react in this way eg copper.
In some cases oxidiser can be external - eg O2 from air. In these cases Pb or Pd can be dissolved in water solution of acetic acid and Au or Ag in diluted KCN
AWK

Offline hmx9123

  • Retired Staff
  • Full Member
  • *
  • Posts: 897
  • Mole Snacks: +59/-18
Re:Silver and Sulfuric Acid
« Reply #5 on: July 11, 2004, 08:44:54 PM »
AWK--the reaction you posted is not balanced.

Offline AWK

  • Retired Staff
  • Sr. Member
  • *
  • Posts: 7321
  • Mole Snacks: +514/-86
  • Gender: Male
Re:Silver and Sulfuric Acid
« Reply #6 on: July 12, 2004, 04:32:05 AM »
AWK--the reaction you posted is not balanced.

Hmx9123, you are quite right, sulfur dioxide is missing. I wrote it (in words) in my second posting.
AWK

HongKongALevelboy

  • Guest
Re:Silver and Sulfuric Acid
« Reply #7 on: January 08, 2005, 04:55:50 AM »
in this reaction , H2SO4 acts as an oxidizing agent , not an acid . acid and metal will form H2 but redox react wont form H2

Offline billnotgatez

  • Global Moderator
  • Sr. Member
  • ***
  • Posts: 3977
  • Mole Snacks: +213/-56
  • Gender: Male
Re:Silver and Sulfuric Acid
« Reply #8 on: February 15, 2005, 09:39:01 PM »
I know that dipping silver into HCl will turn blackesh
I was wondering if the same happens with H2SO4
What would happen with acetic acid?
Could you get a good production of H2 and O2 using silver as an electrode in electrolysis of H2O with a few drops of vinegar?
Regards,
Bill

Offline billnotgatez

  • Global Moderator
  • Sr. Member
  • ***
  • Posts: 3977
  • Mole Snacks: +213/-56
  • Gender: Male
Re:Silver and Sulfuric Acid
« Reply #9 on: February 27, 2005, 06:57:15 PM »
anyone intested in  answering

Offline Mitch

  • General Chemist
  • Administrator
  • Sr. Member
  • *
  • Posts: 5294
  • Mole Snacks: +376/-2
  • Gender: Male
  • "I bring you peace." -Mr. Burns
    • Chemistry Blog
Re:Silver and Sulfuric Acid
« Reply #10 on: February 27, 2005, 08:06:43 PM »
I know that dipping silver into HCl will turn blackesh
I was wondering if the same happens with H2SO4

I thought Awk already answered it.
Most Common Suggestions I Make on the Forums.
1. Start by writing a balanced chemical equation.
2. Don't confuse thermodynamic stability with chemical reactivity.
3. Forum Supports LaTex

Offline AWK

  • Retired Staff
  • Sr. Member
  • *
  • Posts: 7321
  • Mole Snacks: +514/-86
  • Gender: Male
Re:Silver and Sulfuric Acid
« Reply #11 on: February 28, 2005, 02:09:54 AM »
Silver do nor reacts with HCl but in the experiment not only pure HCl is present.
Change on silver surface after long treatment with HCl can be caused by traces of sulfur, hydrogen sulfide, oxygen, nitrogen, nitrogen oxides - all can be present during experiment.
I think the fastest (though very slow indeed)  can be surface reaction of HCl with Ag in the presence of oxygen. Then a small amount of AgCl of insoluble can be formed, AgCl decomposes to Ag (grey blue) and radicals of Cl under light.
AWK

Offline billnotgatez

  • Global Moderator
  • Sr. Member
  • ***
  • Posts: 3977
  • Mole Snacks: +213/-56
  • Gender: Male
Re:Silver and Sulfuric Acid
« Reply #12 on: March 04, 2005, 11:55:26 PM »
What about a little vinegar in water with silver electrodes? Will that do electrolysis and not adversely effect the silver electrodes?


Sponsored Links