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#1
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Useful 10% solutions
"Hydroquinone: To increase the print contrast add 100ml per liter of
working developer." How does one make a 10% solution of this photo chemical? the quote comes from, http://www.jackspcs.com/pitone.htm |
#2
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Useful 10% solutions
A 10% solution of anything (anything soluble anyway) starts with 10 grams of
weighed material in 100ml water (which weighs 100 grams) the ration is 1 part to 10 parts water. -- darkroommike wrote in message oups.com... "Hydroquinone: To increase the print contrast add 100ml per liter of working developer." How does one make a 10% solution of this photo chemical? the quote comes from, http://www.jackspcs.com/pitone.htm |
#4
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Useful 10% solutions
Mike King wrote:
A 10% solution of anything (anything soluble anyway) starts with 10 grams of weighed material in 100ml water (which weighs 100 grams) the ration is 1 part to 10 parts water. Isn't it 10g of weighed material dissolved in enough water to make a total of 100ml of solution? See: http://www.coscosci.com/lab/test_solns.htm Dana |
#5
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Useful 10% solutions
On Wed, 29 Mar 2006 10:18:35 -0800, "Dana H.
Myers" wrote: Mike King wrote: A 10% solution of anything (anything soluble anyway) starts with 10 grams of weighed material in 100ml water (which weighs 100 grams) the ration is 1 part to 10 parts water. Isn't it 10g of weighed material dissolved in enough water to make a total of 100ml of solution? See: http://www.coscosci.com/lab/test_solns.htm Dana March 29, 2006, from Lloyd Erlick, Yes, it is. regards, --le |
#6
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Useful 10% solutions
REana H. Myers wrote:
Isn't it 10g of weighed material dissolved in enough water to make a total of 100ml of solution? A solution is a solvent plus solute. At least in the darkroom % solutions are used. A 10% solution will have as 1/10 it's volume some solute. Usually the portion of solute is in grams. Dan |
#7
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Useful 10% solutions
wrote A solution is a solvent plus solute. At least in the darkroom % solutions are used. A 10% solution will have as 1/10 it's volume some solute. Usually the portion of solute is in grams. Though if it is two liquids the concentration can be by volume - Misters Walker and Daniel are 40% alcohol by volume. |
#8
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Useful 10% solutions
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#9
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Useful 10% solutions
REana H. Myers wrote:
I know what the volume of 10 grams of water is. What's the volume of 10g of NaOH? I think you're mixing up two different conventions. Dana A 10ml solution of 10% NaOH will have 1 gram of the solute; 10% of the solutions volume. As I said the solute's amount is usually in grams. Dan |
#10
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Useful 10% solutions
wrote
A 10ml solution of 10% NaOH will have 1 gram of the solute; 10% of the solutions volume. Not 10% of the unit's volume ... usually the volume of the solution is less than the volume of the sum of the individual components. A 10% by weight solution is a bit confusing ... better to call it a .1g/ml or 100g/l solution. Mixing mass and volume is a no-no, though for water the two are functionally the same: 1g = 1ml. After the solution is made up, however, the density is normally greater than 1g/ml and the equivelance is no longer. Example, 10% mass(weight)/vol solution of salt water: 100 g salt \ = 1000ml salt water with a density 990 ml H20 / of 1090 g/l (I can't remember the actual numbers for salt water and I can't find the CRC) To make a 10% w/v solution you put in 100 gm of stuff and add _however much water it takes_ to make 1 liter. The amount of water required varies with what the stuff is. Imagine a 10% w/v solution of Styrofoam balls: all Styrofoam and just about no water. -- Nicholas O. Lindan, Cleveland, Ohio Consulting Engineer: Electronics, Photonics, Informatics. Remove blanks to reply: n o lindan at ix . netcom . com |
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