Kno3

[boris_73]

how can you dry KNO3 when it has become damp

[r1dermon]

put it in a tissue, or some toilet paper, and then hit it with a hair dryer....i'd imagine that should work...

[Chintamani]

put some strongly hygroscopic powder which is free of moisture in the descicator and keep KNO3 in a dish.close the lid and KNO3 should be dried shortly. But DO NOT

HEAT IT

[YT2095]

I dry mine in the oven, spread it out evenly on a baking tray then leave it in the oven for a few hours at 100 to 150c.

 

it never fails

[ed84c]

would it not decompose under heat condititions

[boris_73]

i'll heat it that seems the simpliest way thank you

[YT2095]

would it not decompose under heat condititions

it certainly can indeed, but considering it only decomposes at 513 Kelvin, any household cooker would be hard pushed to acheive that at FULL POWER!. so 100 to 150c isn`t going to do a thing to it other than drive off any water

[JerryK]

I have 1 5lb box of Nitrate of Soda 16-0-0 and 1 5lb box of Muriate of Potash 0.0.60. I was wondering what would be the procedure in mixing the 2 for making Potassium Nitrate. What would be the weight of mixture, what would it be dissolved in and how would you dry it out. Is it possible?

Thanks in Advance!

[ed84c]

K displaces Na so i suppose using the ratio of Mr NaNO3/ Ar Kwhatever it is, with obviously the ratio Na to K, would be a start and then disolving the 2 (K displaces Na)

[YT2095]

K displaces Na so i suppose using the ratio of Mr NaNO3/ Ar Kwhatever it is, with obviously the ratio Na to K, would be a start and then disolving the 2 (K displaces Na)

HUH!?????

 

 

lets answer this question PROPERLY!

 

consider Na N and O3 each has a molar value

 

Na= 11 N=7 Ox3 =24 totaling 42 grams per mole

 

now for K and Cl

 

K=19 and Cl=17, totaling 36 grams per mole.

 

you want a 1 for 1 displacement reaction, so use 42 grams of NaNO3 to 36 grams of KCl in a saturated and heated water soln and allow it to cool slowly, the KNO3 will form the crystals 1`st as it`s the least soluble of the 2

 

that should do the trick nicely (that`s what I do!)

[JerryK]

Great Information, Thank You, Now another question, I have a 5lb Bag Of Sulfur that is 90% pure, how would I get the impurities out of the sulfur to get it close to 99%, boil it in water?

[budullewraagh]

well...... you could add water, heat to, say 75 celsius then pour off the water, then "boil" whatever dampness remains. that should remove all polar/ionic solutes. actually to be more accurate you could use sulfuric acid. as for nonpolar solutes, you may have to play around with various solvents.

[YT2095]

don`t boil it too much, warm will be just fine, Sulpher will melt eventualy and make quite a mess.

[Gilded]

"don`t boil it too much, warm will be just fine, Sulpher will melt eventualy and make quite a mess."

 

Have you ever seen plastic sulphur? It's quite interesting, I'd like to have some for my collection.

[YT2095]

I have indeed, that`s why boiling it isn`t a great idea

I`ve seen Red sulpher too

[jsatan]

plastic sulphur? whats this?

(I know its a plastic, or is it)

[YT2095]

it`s an allotrope of Sulpher, it resembles bubble gum with the yellow sulpher color, but will go brittle again if messed about with for a while.

 

a bit like "Work hardening" in some metals

[Gilded]

I know plastic sulphur is made by cooling a stream of S rapidly, and I also know that when heated sulphur gets a red color.

 

"I`ve seen Red sulpher too :)"

 

A room temp. sulfur that's red? How's that done?

[YT2095]

I know plastic sulphur is made by cooling a stream of S rapidly' date=' and I also know that when heated sulphur gets a red color.

 

"I`ve seen Red sulpher too :)"

 

A room temp. sulfur that's red? How's that done? [/quote']

actualy we made it by boiling it in water untill it melted then dumping it cold water whilst still hot.

 

who mentioned Red Sulper at room temp? LOL

[Gilded]

With the stream thing I meant plastic sulphur in the form that's similar to a rubber band.

 

"who mentioned Red Sulper at room temp? LOL :)"

 

Sneaky little Britsman. I assumed you were talking about sulphur that's organized so that it appears red (which is the case with red and white phosphorous).

[YT2095]

there is also Yellow and Black phosphourus too!

[budullewraagh]

dont forget blue p as well

[JHAQ]

Carefully .KNO3 is relatively heat stable to a high degree ( unless mixed with organic material ), unlike NH4 NO3 .

[jdurg]

there is also Yellow and Black phosphourus too!

 

 

True, but it's debateable as to whether or not yellow phosphorus is a true allotrope, or just a mixture of white and red phosphorus. Black phosphorus is a true allotrope, however, which has been verified by its chemical reactivity and structure.

[budullewraagh]

dont forget the blue p!!