Amount of silver nitrate in solution (for the chemists out there)

[adelorenzo]

Can someone please confirm or correct my calculations here?

I am looking at a 0.1N molar solution of silver nitrate
Molar mass of silver nitrate is 169.87
Therefore a 0.1N solution has 16.987 g of silver per L
So this is what one would call a 1.7% solution of silver nitrate?

 

[cliveh]

Can someone please confirm or correct my calculations here?

I am looking at a 0.1N molar solution of silver nitrate
Molar mass of silver nitrate is 169.87
Therefore a 0.1N solution has 16.987 g of silver per L
So this is what one would call a 1.7% solution of silver nitrate?

For what process formulation and application?

 

[mopar_guy]

I don't know if this will help, but take a look:

http://www.graphpad.com/quickcalcs/

 

[mopar_guy]

Or this one:

http://www.physiologyweb.com/calculators/molar_solution_concentration_calculator.html

 

[Prof_Pixel]

Keep in mind that Molarity (M) and Normality (N) are not always the same.

 

[18%gray]

Sorry that I cannot answer the question, but I do have another, related question; does anyone know how much silver there is in, say, a roll of 120 color film, or B&W, or slide film?

Or 35 mm for that matter, or 4x5?

I'm trying to figure out how high the price of silver would need to be before it affects the price (and/or the availability) of film.

 

[adelorenzo]

That online calculator seems to confirm my numbers. I'm checking for local(-ish) sources for silver nitrate for kallitypes which require something like a 10% solution. I wasn't totally sure what 0.1N meant as I don't do much chemistry.

So far it looks like Canadian sources are much, much more expensive than getting it from the USA. Even factoring in the falling Canadian dollar and some extremely high shipping costs.

 

[Gerald C Koch]

Your calculations are correct.

I hope that you are not intending to purchase a ready made solution because you will be paying to ship water. Just buy the solid and mix your own. Use distilled water for any chloride in tap water will yield a cloudy solution.

 

[Photo Engineer]

Adelorenzo, your work is correct, and in this case molarity = normality because it is AgNO3 with no subscript between the Ag and NO3. In the case of Sulfuric Acid, H2SO4, there is a subscript between the H and the SO4 making these factors unequal.

PE

 

[nsurit]

I get mine from Bostick and Sullivan after checking other places. Seems like I always end up buying from B&S.

 

[adelorenzo]

I'd buy it in solution if it was cheaper and some places do sell solutions cheaper than the crystals. In case anyone was wondering the prices for this stuff in Canada are pretty nuts.

After poking around the internet even with major shipping charges added on it looks like B&S is still the best source. If they'll ship it across the border, that is. It looks like they will although Photo Formulary and most others won't.

 

[Wayne]

Sorry that I cannot answer the question, but I do have another, related question; does anyone know how much silver there is in, say, a roll of 120 color film, or B&W, or slide film?

Or 35 mm for that matter, or 4x5?

I'm trying to figure out how high the price of silver would need to be before it affects the price (and/or the availability) of film.

Oh, ouch, Your second post and already hijacking threads. I think you have to wait until at least 5 posts to do that. Tsk tsk

 

[Photo Engineer]

Besides Wayne, that question has been asked and answered over and over here on APUG.

PE

 

[alanrockwood]

Just one more note on the relationship between normality and molarity: there factor for conversion between normality and molarity depends on the reaction taking place. Taking sulfuric acid as an example, a 1 molar solution of H2SO4 can be either 1 normal or 2 normal. For example, if the reaction is NaOH + H2SO4 --> Na(+) + HSO4(-) + H2O then the solution is 1 Normal. If the reaction is 2NaH --> 2Na(+) + SO4(2-) + 2H2O then the solution is 2 normal.

Also, normality may refer to a number of different things, such as acid/base chemistry, redox chemistry, etc. Some reagents are capable of taking part in more than one type of reaction. The normality of a solution of reagent may depend on what type of reaction is taking place. For example, a hypothetical compound my be able to donate a single proton for acid/base chemistry, but two electrons in a redox reaction. The normality of the solution will be different for the two types of reaction.

 

[NedL]

FWIW, I searched around pretty carefully about a month ago and ended up getting it at B&S too.

 

[Photo Engineer]

Just one more note on the relationship between normality and molarity: there factor for conversion between normality and molarity depends on the reaction taking place. Taking sulfuric acid as an example, a 1 molar solution of H2SO4 can be either 1 normal or 2 normal. For example, if the reaction is NaOH + H2SO4 --> Na(+) + HSO4(-) + H2O then the solution is 1 Normal. If the reaction is 2NaH --> 2Na(+) + SO4(2-) + 2H2O then the solution is 2 normal.

Also, normality may refer to a number of different things, such as acid/base chemistry, redox chemistry, etc. Some reagents are capable of taking part in more than one type of reaction. The normality of a solution of reagent may depend on what type of reaction is taking place. For example, a hypothetical compound my be able to donate a single proton for acid/base chemistry, but two electrons in a redox reaction. The normality of the solution will be different for the two types of reaction.

Sorry, but normality and molarity never change. A 1 N solution of H2SO4 in H+ is 1N no matter the reaction.

PE

 

[Photo Engineer]

I re-read Alan's post and boy did I misread it. Of course he is correct and I am wrong. Sorry to all and especially to Alan.

PE

 

[alanrockwood]

I re-read Alan's post and boy did I misread it. Of course he is correct and I am wrong. Sorry to all and especially to Alan.

PE

Perfectly alright. Thanks PE.

 

[adelorenzo]

Just for the record, what has come of my research is that you can't ship Silver Nitrate crystals to Canada from the US. B&S will ship silver nitrate solutions to Canada. The cost per gram of silver is almost the same in solution as in crystal form, and the shipping cost is the same, so that is still the cheapest option for Canadians.

Prices in Canada very widely for the crystals, from double to ten times(!) more expensive per gram before shipping and exchange is considered. I managed to find a supplier whose prices for the crystals are only about 40% higher than Bostick and Sullivan after you factor in higher shipping costs and exchange rate.

In the end I went with the Canadian supplier (New Horizons Scientific) as I was already ordering a bunch of other chemicals from them.

 

[Herzeleid]

Have you checked local businesses dealing with valuable metals - jewelry, plating etc.? Some of these people get their gold and silver from recycling, their prices are very cheap compared to lab suppliers. Some lab chemicals are extra pure for titration or other analysis purposes. For making kallitypes you do not need %99,9999 purity silver nitrate. And silver nitrate isn't the trickiest chemical compound to produce, so it is not that prone to problems imo. I never had problems using the silver nitrate bought from such local business.
I have recently bought some SN, for 1g of silver nitrate I paid the price of 1g silver bar. I assume that was fair, considering the middle men involved. http://www.silvergrambars.com/

EDIT: BTW, The prices of silver nitrate in lab grade chemical suppliers are similar here, sometimes triple and even ten times more expensive.