April 16, 2021, 10:21:29 PM
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Although I don’t quite understand it, it’s very useful to read what everyone shared. I have to study a lot. I also have an article to share with you.
To share with you the trilogy required for <a href="https://bestasicminers.wordpress.com/2021/04/02/mining-trilogy-concentrator-concentrator-and-decision-strategy/">cryptocurrency mining</a>,they are: concentrator, miner selection and decision strategy.
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Physical Chemistry Forum / Re: Relative Ionic Radii (K+ vs Sr2+)
« Last post by RH111 on Today at 06:13:02 PM »
Oh, my apologies, I am mistaken. Thank you.
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Physical Chemistry Forum / Re: Relative Ionic Radii (K+ vs Sr2+)
« Last post by Orcio_Dojek on Today at 06:07:17 PM »
https://en.wikipedia.org/wiki/Ionic_radius

Here they wrote tha Ca2+ is smaller than Na+ and Ba2+ is smaller than Rb+.
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Generic Discussion / Re: Is dried Sulfuric Acid on a surface dangerous?
« Last post by Avian on Today at 06:00:39 PM »
If I touched some of this "dried" sulfuric acid could it have burned me since hands are moist?

No.

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Would it have been obvious?

Yes.

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Would the spots I walked on have transferred to my shoes and could that have burned me when I took my shoes off?

No.

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If it did start burning my hands would it transfer to things I touched throughout the day?

No.

Or, more precisely, if it would start burning first thing to do is to wash your hands with copious amounts of flowing water. After that any acid present would be rinsed and there will be none left.

So is it getting diluted from the water in the air?

A bit. It also dries up, so even if accidentally spilled and not cleaned up it won't stay there forever. As long as these are stains and not poodles there is nothing to worry about.

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Even if I got some trace amounts on my skin would the other day would it not be a huge issue?

No.

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The scariest thing for me having a chemical phobia is the idea of it contaminating everything I touch and getting burns over and over when

It doesn't work this way, don't worry.

Thanks for answering! 
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Physical Chemistry Forum / Re: Relative Ionic Radii (K+ vs Sr2+)
« Last post by RH111 on Today at 05:57:14 PM »
Thanks!

A quick follow-up:
Why doesn't the same hold true for Ca2+ vs Na+ (Na+ is smaller) or Ba2+ vs Rb+ (Rb+ is smaller)?

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Physical Chemistry Forum / Re: Relative Ionic Radii (K+ vs Sr2+)
« Last post by Orcio_Dojek on Today at 05:42:22 PM »
https://en.wikipedia.org/wiki/Atomic_radius

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factor - nuclear charge - attractive force acting on electrons by protons in nucleus - increase along each period (left to right) - decreases the atomic radius

Positive charge will even increase this factor in favour of Sr2+.
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Generic Discussion / Re: Is dried Sulfuric Acid on a surface dangerous?
« Last post by Avian on Today at 05:42:00 PM »
Is that because the moisture on your hand isn't wet enough to pick up enough to transfer it?  It is comforting to know I at least won't have to worry about everything I touched that day being contaminated if I even got any on me.  Thanks again!
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Physical Chemistry Forum / Relative Ionic Radii (K+ vs Sr2+)
« Last post by RH111 on Today at 05:07:36 PM »
Hi all,

I was wondering why the potassium ion (K+) is larger than the strontium ion (Sr2+). From my understanding, the addition of the n=4 electron shell should result in the strontium ion being larger. However, that is not the case. I think the difference has something to do with the additional two protons in strontium 2+ relative to it's nearest noble gas Kr (K+ only has one additional proton commpared to Ar).

However, without searching up the atomic radii (or anything outside of what's in the periodic table), how can I compare the radii of two ions with different charges like K+ and Sr2+?

Thanks!
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Only it happend fresh. If it happend long ago there will not be much impact.
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Generic Discussion / Re: Is dried Sulfuric Acid on a surface dangerous?
« Last post by Avian on Today at 04:16:05 PM »
Dried sulfuric is not stable to get still dry. It absorbs water and it get more dilute. What you see on floor and table is etching damage. Normally if the chemicals are spilled there are removed and the items are cleaned and washed. But the damage will be remain. So dont worry.

Thanks for the reply.  Do you know if it transfers from person to object?  If I grabbed some keys from someone who was touching a bottle had sulfuric acid spilled on it long ago would the acid go from his hands to the keys and then burn my hands?  I am probably overthinking things but that would be the scenario where I was most likely exposed.
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