0
Why is cold solvent used to wash crystals after the mother liquor is removed?
Wiki User
∙ 11y ago
Usually, solvents at lower temperature can dissolve lower amount of crystals than solvents at higher temperatures.
For eg. if impurity is salt then you are better off washing it at a lower temperature as salts have a good solubility even at lower temperatures and as you raise temperature your crystals will start dissolving in the warm solvent.
Wiki User
∙ 11y ago
Add your answer:
Earn +20 pts
How can you produce potassium gold cyanide give detail?
how I make PGC : 1. Make aquaregia (75% HCL + 25% HNO3) from high grade chemical. 2. Introduce the Gold (24 kt) in bulk or small piece in warm aquaregia for fast soluble. (gold : aquaregia is about 1 : 5 weight). 3. Heat the solution, don't exceed 85 degree Celcius. 4. A long heating introduce excess HCL. 5. Heat and evaporated until you got a concentrate like syrup that is Gold Chloride. 6. Gold chloride will become cristall when you cool the syrup. 7. Introduce a little water to disolve the gold chloride. 8. Make amonia solution of 30 ml Amonia in 100 ml water cocentration. (use high grade amonia). 9. Pour the amonia slowly to Gold Chloride until Ph=8. You will get the precipitate that call Gold Fulminating. Be carefull with the Fulminating, It should not to dry because it is Highly Explosive Danger ! 10. Wash the Precipitate to remove excess amonia. Wash several time until PH reach near 7. 11. Make another concentrate Potasium Cyanide solution (KCN). 12. Pour the KCN to Fulminating Gold slowly with agitation until all the fulminating disolve. You Got a solution name Mother Liquor. 13. Heat the Mother Liquor, my experience not over 65 degree celcius. Evaporate amonia from mother liquor until no amonia smell anymore. 14. Cristallize the PGC by continue evaporation. Vacum will be very helpfull. You don't need to evaporate all the mother liquor. Until you evaporate about 75% volume stop the process. Collect the PGC and keep the mother liquor. Dry the PGC by vacum. Mother liquor still can be use in the next production by mixed it with the next Fulminating. 15. Do the all the process in very good ventilation. Good luck.
What does centrifuging have to do with chemistry?
When a compound is dissolved in a solvent if it is not dissolve in it or if we want to separate the solid from it we use the centrifuge if we put the sample in it and set the RPM the solid particles settles with that speed of RPM that we have set so the we can filter or decant the filterate Mother liqour and proceed with the centrifugate to further step
What is meant by crystallinity in polymers?
Crystals are type of solid state bodies whose structural order are well defined and have a unique lattice structures. There is a perfect distance between the various layers in its structure. Crystallinity has big influence on the hardness, density of the body. Non- Crystalline substances are the ones who lack the structural order and do not posses the well defined lattice structure. They tend to have lower density and low melting point as there atoms are scattered. Crystals have high tensile strength while the non crystals are not.
Who was Henry Moseley's mother?
The mother of Henry Moseley was Anabel Gwyn Jeffreys Moseley.
Who was jj thomson's parents?
His father was Joseph James Thomson. His mother was Emma Swindell.
What is mother liquor in crystallization?
Mother liquor is a deprecated term from older chemistry texts that refers to the solution that remains after crystallization occurs and the crystals are removed.
What relationship to you is your mother's cousin's daughter?
Your mother's first cousin is your first cousin once removed. Your mother's second cousin is your second cousin once removed. If you are talking about your mother's first cousin once removed, you may be first cousins twice removed or second cousins, depending on the specifics.
Is your mother's cousin considered your aunt?
No, your mother's first cousin is your first cousin once removed. Her second cousin is your second cousin once removed. Your mother's sister is your aunt.
What relation is mother's niece's children to her?
Your mother's nieces' children are your mother's grand nephews or grand nieces. They are your first cousins, once removed.
Can a child be removed from Mother for indiscretions?
Yes.
How is your mom's cousin related to you?
Your mother's first cousin is your first cousin, once removed. Your mother's second cousin is your second cousin, once removed.
Can you give your 7 month puppy watered down milk?
It is not reccomended to give any dog milk, other than dog milk from its mother. There is too much calcium in it, which can lead to bladder stones or crystals which can be very painful, and possibly have to be surgically removed.
What relation to me is my mother's mother's brother's son?
He would be your first cousin once removed.
What is your mother's cousin's relation to you?
Your mother's first cousin is your first cousin, once removed
What is your mother's first cousin's once removed husband to you?
The husband of your mother's first cousin, once removed, is not related to you as you do not share a common ancestor. In some cases, your mother's first cousin once removed is your second cousin. so you would refer to the husband as "my second cousin's husband." In other cases, your mother's first cousin, once removed, is your first cousin, twice removed. It might be easier to refer to that husband as "my gransmother's first cousin's husband."
Who played billy crystals mother in sitcom soap?
Cathryn Damon played Mary Campbell who was Jodie Dallas' (Billy Crystal) mother in Soap.
How are you relatived to your moms second cousin once removed?
Your mother's second cousin twice removed is either your third cousin once removed or your second cousin three times removed. Which it is depends on whether the second cousin twice removed is the grandchild of your mother's second cousin or the grandparent of her fourth cousin.
