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Faraday's Equation Calculator


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Author: "Herx"
Contact: E-mail
Source: silverlist@eskimo.com, Yahoo Silver List
Original Source Format: Text, html, Excel
Edited: Reformatted, emphasis ours, no technical information omitted, spelling, small linguistic modifications
Copyrights: Content copyright 2000 "Herx", released to public domain for educational use. HTML copyright 2001 AVRA, rights reserved, released for noncommercial applications.

Items both in brackets and italicized are editor additions to the text.

Items with linked text provide definitions and/or further explanations provided by the editors, not the author. Javascript must be enabled to view the extra comments. A temporary popup window will load and stay on-screen as long as the mouse is over the linked text. Position the linked text toward the bottom of your computer screen for viewing purposes.


Frequently Asked Questions for the Colloidal Silver ppm Calculator
Updated September 6, 2001

I make no claims of any kind regarding the safety, uses or effectiveness of colloidal silver (CS). I have simply used basic principles of chemistry to calculate how much silver would be deposited into distilled water (DW) when a given amount of electric current is passed through pure silver electrodes. Then I calculate the parts per million (ppm) as a ratio of the mass of silver deposited to the mass of the DW into which it has been deposited. This is elementary high-school science. You may look up the equations yourself if you like. Try looking up "Faraday's equation for electrolytic deposition" or "Faraday's Constant".

This file will be updated periodically. If you received the calculator from a friend, check the following link for the updated FAQ file and other instructions:

[ The actual spreadsheet may be downloaded by right clicking this link and saving the excel spreadsheet to one's local hard drive.]

Faraday Calculator Spreadsheet

[ Reference the illustrated instructions above and below for proper use of the Spreadsheet ]

Faraday Calculator Spreadsheet

[ For an explanation of the principles and calculations of Faraday's Equation, please see: Bob Lee's "How Much Silver Did I Drink? ]


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There are 6 comments
Daniel Jackson – kentucky
November 29, 2009 - 06:24
Subject: wire distance

The silver wire distance in terms of how far apart the wire is. Makes no difference with the calculations. The closer the wires, the higher the current and the faster the silver will be plated out. The further apart they are, the slower the process.

The calculations also take into account the amount of water used, and so the ml or grams of water that the silver is plated out into.

Stirring of the water prevents the silver from forming in a path in the water just between the electrodes and so, slows down the current flow. Stirring is desired for distribution of the silver so that fewer large sized molecules of silver is formed. Highly oxygenated water helps to suspend the atoms of silver in the water better ~ and so. Helps us to have some single atoms along with smaller molecules.

As little as 4 drops of 3% H202 per 8 oz of distilled water in the process adds enough oxygen. The hydrogen is liberated as gas. Never add salt to the water to start an initial current flow. This only contaminates the silver wire and eats it up over time.

Raymond Hince
October 24, 2009 - 20:41
Subject: Distance between probes

I just made 2 batches after the last email of the exact same PPMs [6-8]. Using the Faraday equation info, the ratio was about 17.4 times less than the Faraday equation says I should have on the first one I produced. Probes 1.25" apart. At .5" apart on the second batch, it was 9.6 times less, on the third batch I added 3 more sets of wires at .5" apart, it was 4.7 ratio to the Faraday. Production time of all 3 experiments to achieve 6-8 PPMs was 145 min, 80 min, 39 min, respectively. Very little tyndale effect using a laser pointer and very clear. Awesome. Leads me to believe the surface area and distance between probes is key. My next experiment will be to replace all 8 probes with 12 guage wire instead of 14 guage. According to Faraday, I should be able to produce 380ml at 6-8ppms using constant 5.1mA in 24 minutes, crystal clear with very little Tyndale Effect.

Alan Wei – California
October 20, 2009 - 00:38
Subject: Anode and Cathode distance

The silver.xls spreadsheet does not indicate distance between the anode and cathode in measuring milliamp and ppm. Could someone please elaborate on this?
I use 3 inches between electrodes and read the potential based on this distance.
What distance was used for the spreadsheet?

Reply to Alan Wei
Raymond Hince
October 24, 2009 - 16:42
Subject: Re: Anode and Cathode distance

You bring a good point. On a previous comment I wrote:
I am a little confused. I made a colloidal silver generator that is constantly delivering 5.1mA, I ran it for 145 minutes for 380ml of pure distilled water of 1%. According to your formulas, I should have about 130 ppm. My TDS meter indicated 3 ppm. Because these meters are calibrated using salt solution, the meter values must be multiplied by 2 to 2.5 times for a truer ppm, because it takes about twice the silver ions to generate a signal as salt solution, bringing it to 6-8ppm. A PWT meter is closer to the real value of the silver content, measured in microsiemens. One microsiemens=one part per million for silver. Can you explain the discrepancy between 130PPM using Faraday's equation and using a PWT that measures microsiemens and gives a reading of about 6-8?

This would explain possibly why my calculations do not lineup with Faraday's equation. The distance between the probes might be the answer. Perhaps the distance if closer with time modified could bring the two together. I am currently bringing my probes closer from 1 1/4" inch to 1/2" and testing. Will report back.

Reply to Alan Wei
Alan Wei
October 24, 2009 - 19:36
Subject: Re: Anode and Cathode distance

You bring a good point. On a previous comment I wrote:
I am a little confused. I made a colloidal silver generator that is constantly delivering 5.1mA, I ran it for 145 minutes for 380ml of pure distilled water of 1%. According to your formulas, I should have about 130 ppm. My TDS meter indicated 3 ppm. Because these meters are calibrated using salt solution, the meter values must be multiplied by 2 to 2.5 times for a truer ppm, because it takes about twice the silver ions to generate a signal as salt solution, bringing it to 6-8ppm. A PWT meter is closer to the real value of the silver content, measured in microsiemens. One microsiemens=one part per million for silver. Can you explain the discrepancy between 130PPM using Faraday's equation and using a PWT that measures microsiemens and gives a reading of about 6-8?

This would explain possibly why my calculations do not lineup with Faraday's equation. The distance between the probes might be the answer. Perhaps the distance if closer with time modified could bring the two together. I am currently bringing my probes closer from 1 1/4" inch to 1/2" and testing. Will report back.

Hi Raymond,
Thanks for the reply. I find that the amount of solution is not a factor. I find that having the electrodes farther apart slows the reaction and produces a higher quality; lower particle sizes.
Over a period of about a week I can achieve a 100 ma solution measured at a distance of 3 inches. The tyndall effect looks very good. What would be estimate of ppm. I would think somewhere between 500 and 1000 ppm. What do you think?
Alan

Alan Wei
October 19, 2009 - 20:50
Subject: Silver.xls

Thanks so much for this site and the spreadsheet. I have read everything although may find more.
Alan Wei

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