Homebrew PCBs

Rob,

For a battery demonstration, stick to the lemon juice.

You might want to stay away from the copper sulfate- 
http://pmep.cce.cornell.edu/profiles/extoxnet/carbaryl-dicrotophos/copper-sulfate-ext.html

Harvey
On 1/16/2017 12:22 AM, Rob roomberg@... [Homebrew_PCBs] wrote:
>
> what is sulfate of zinc and acidulated water and saturated copper 
> sulfate crystals ?
> Do we have any chemists out there?
>
> I found an old time article how to make a battery and it specified
>
>  sulfate of zinc and acidulated water and saturated copper sulfate 
> crystals
>
> http://www.learnmorsecode.com/regen2/battery02.jpg
>
> The article said to use ZINC SULFATE
> or
> ACIDULATED water.
>
> So I got look up ZINC SULFATE on the web and is says we can buy 220mg 
> zinc sulfate capsules...to eat.
> huh?!!??
> edible batteries?
>
> Zinc Sulfate (220mg) - 100 Capsules
> Zinc sulfate is an inorganic compound and dietary supplement. As a 
> supplement it is used to treat zinc deficiency
>
>
> but hey...it did say "OR"
> and when I look up acidulated water it said
>
> wiki:
> Acidulated water is water that an acid has been added to it, usually 
> lemon juice, lime juice or vinegar. Citric acid and ascorbic acid can 
> also be used.
>
>  Acidulated water can be made by combining 1.5 tablespoons vinegar or 
> 3 tablespoons lemon juice.
>
> sooooo...... OK... this doesn't sound real toxic or dangerous to show 
> and tell kids battery chemistry....
>
> AND THEN
> there is the saturated copper sulfate....
> which is readily available at th eharware store
>  ROOT KILL copper sulfate pentahydrate 99%
> and instructions on the web say:
>
> First, you need a saturated copper sulfate solution so the crystals 
> can form as the liquid evaporates. All you need to do to make the 
> solution is to stir copper sulfate into very hot water until no more 
> will dissolve. There are two ways to grow the crystals.Apr 26, 2014
> How To Grow Blue Copper Sulfate Crystals - Science Notes and Projects
> https://sciencenotes.org/how-to-grow-blue-copper-sulfate-crystals/
>
> OR
> just buy 10 pounds of crystals from a seed supply house for $32.
>
> So is this feasible or would parents be pissed if they knew their kids 
> were near these chemicals?
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