Solving the Mystery of White Crusty Substance After H2O2 Use

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Discussion Overview

The discussion revolves around the observation of a white, crusty substance formed after applying concentrated hydrogen peroxide (H2O2) on a copper scrubbing pad. Participants explore the nature of this substance and express concerns regarding the safety of concentrating hydrogen peroxide.

Discussion Character

  • Debate/contested
  • Technical explanation

Main Points Raised

  • One participant suggests that the white crust could be an oxide or a combination of oxides, depending on the material the H2O2 was applied to.
  • Another participant expresses concern about the dangers of concentrating H2O2, implying that the original poster may not fully understand the risks involved.
  • The original poster seeks clarification on the nature of the white crust and methods to determine the concentration of hydrogen peroxide in their solution.

Areas of Agreement / Disagreement

Participants generally agree on the potential dangers of concentrating hydrogen peroxide, but there is no consensus on the exact nature of the white crusty substance or how to test the concentration of the solution.

Contextual Notes

There are unresolved assumptions regarding the specific materials involved and the chemical reactions that may be occurring. The discussion does not clarify the exact composition of the white crust or the methods to safely test the hydrogen peroxide concentration.

Theoden
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Hi,

I have just concentrated some H2O2 from a diluted 3% concentration. I used it on a copper scrubbing pad earlier to test how well it would oxidize; but now there is a white, crusty substance where the H2O2 used to be. I then tested it on different surfaces, but every time it dries I get the same white crust. What is this substance? The original solution did not form it. And is there any way to test the percentage of hydrogen peroxide from my solution? Any help would be greatly appreciated!
 
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It would be an oxide or a combination of oxides depending on the exact composition of the material which you applied the H2O2 on to.
The 'extra' oxygen will react with almost anything, even metallic impurities present in glass.
 
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Theoden said:
I have just concentrated some H2O2 from a diluted 3% concentration.

You are again trying to do dangerous things you have no idea abut?
 
Thanks!
 
Borek said:
You are again trying to do dangerous things you have no idea abut?
Nope. I am trying to find out what the white crust is; and how to know what percentage of hydrogen peroxide my solution has.
 
Concentrating H2O2 is dangerous. Apparently you din't know even that.

Topic locked. Sorry, we won't help you hurt yourself.
 

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