Do i have to go online to buy it or do stores have them? If so, what type of store?Where can i buy powdered zinc?
http://skylighter.com/mall/chemicals.asp鈥?/a>
Probably the easiest to get it online.
Friday, January 8, 2010
Powdered zinc carbonate is added to a solution of nitric acid until effervescence ceases.pH level?
Does it decrease/increase to about 7 or decreases to 3 or icnrease to 12?Powdered zinc carbonate is added to a solution of nitric acid until effervescence ceases.pH level?
A solution of HNO3 will be quite acidic, perhaps around pH 1. Adding ZnCO3 will produce CO2 gas and Zn ions.
ZnCO3(aq) + HNO3(aq) --%26gt; Zn(NO3)2(aq) + CO2(g) + H2O
When the gas production stops the H+ from the acid will have been consumed (neutralized).
In reality, there will be no Zn(NO3)2, there will be zinc ions and nitrate ions. The zinc ions will hydrolyze to a slight extent producing Zn(OH)^+ and H+. The CO2 still in solution (CO2 is soluble in water) will hydrolyze to form a weakly acidic solution:
CO2 + H2O %26lt;==%26gt; H+ + HCO3^-
From this we can infer that after the neutralization of the HNO3, the resulting solution will still be acidic with a pH closer to 6.
============= Follow up ===============
Puchhki said. ';...carbonic acid the pH will be more than 7.';
I must respectfully disagree with Puchhki. What we think of as ';carbonic acid'; is not molecules of H2CO3, but rather the equilibrium between CO2, H2O, H+ and HCO3- as I've shown above. The solution will be acidic, and therefore have a pH below 7. Carbon dioxide dissolved in water contributes to acid rain. Acid rain has a pH below 7. CO2 dissolved in water will NOT be basic as Puchhki has suggested.Powdered zinc carbonate is added to a solution of nitric acid until effervescence ceases.pH level?
effervescence cease means that nitric acid has exhausted
now the solution has carbonic acid, unreacted Zn-carbonate and ZnCl2.
because of the carbonic acid the pH will be more than 7, but not extremely high-because H2CO3 is not a strong acid
A solution of HNO3 will be quite acidic, perhaps around pH 1. Adding ZnCO3 will produce CO2 gas and Zn ions.
ZnCO3(aq) + HNO3(aq) --%26gt; Zn(NO3)2(aq) + CO2(g) + H2O
When the gas production stops the H+ from the acid will have been consumed (neutralized).
In reality, there will be no Zn(NO3)2, there will be zinc ions and nitrate ions. The zinc ions will hydrolyze to a slight extent producing Zn(OH)^+ and H+. The CO2 still in solution (CO2 is soluble in water) will hydrolyze to form a weakly acidic solution:
CO2 + H2O %26lt;==%26gt; H+ + HCO3^-
From this we can infer that after the neutralization of the HNO3, the resulting solution will still be acidic with a pH closer to 6.
============= Follow up ===============
Puchhki said. ';...carbonic acid the pH will be more than 7.';
I must respectfully disagree with Puchhki. What we think of as ';carbonic acid'; is not molecules of H2CO3, but rather the equilibrium between CO2, H2O, H+ and HCO3- as I've shown above. The solution will be acidic, and therefore have a pH below 7. Carbon dioxide dissolved in water contributes to acid rain. Acid rain has a pH below 7. CO2 dissolved in water will NOT be basic as Puchhki has suggested.Powdered zinc carbonate is added to a solution of nitric acid until effervescence ceases.pH level?
effervescence cease means that nitric acid has exhausted
now the solution has carbonic acid, unreacted Zn-carbonate and ZnCl2.
because of the carbonic acid the pH will be more than 7, but not extremely high-because H2CO3 is not a strong acid
Hey does anyone now how to make zinc metal into powder?
You should use an abrassive tool as the emery of a grinding stone (similar to the one used to sharp knives)Hey does anyone now how to make zinc metal into powder?
I think you would have to add an acid to produce a salt and water.
I think you would have to add an acid to produce a salt and water.
How can one separate gold from a mixture of zinc and gold? Also, how can one determine whether a white powder?
was zinc sulfide or sodium carbonate using a hydrochloric acid solution?How can one separate gold from a mixture of zinc and gold? Also, how can one determine whether a white powder?
If the white powder is sodium carbonate, when you react it with HCl, you will get carbon dioxide gas given off as one of the products of the reaction.. this gas is odorless.
If the white powder is Zinc Sulphide, when you react it with HCl, you will get sulphur dioxide gas given off as one of the products of the reaction, this gas smells like rotten eggs and is toxic.
As for the Zinc Gold mixture, you can use different methods of extraction.. both have different melting points.. you can melt the metal with the lower melting point and pour it off, or you can add a strong acid such as Sulphuric Acid to react with the mixture... Pure Gold will not react to the mixture, all the Zinc will react (in presence of enough acid) and become a salt that is soluble in water... then you just filter the gold out from the solutionHow can one separate gold from a mixture of zinc and gold? Also, how can one determine whether a white powder?
Well commenting on Paka the gas formed by the reaction of HCl to ZnS is not sulfure dioxide its hydrogen sulfide or H2S Report Abuse
Q1. Dissolve the material in a stong acid like Nitric or sulfuric acid. The Zinc should dissolve but the gold will not.
Q2. In reaction with hydrochloric acid both Zinc Sulfide and Sodium Carbonate will react- Na2CO3 forms an odorless colorless gas. ZnS will form hydrogen sulfide gas which stinks to high heaven. That would be my qualitiative test. Be careful doing this reaction in lab, as Hydrogen sulfide is a toxic gas that can be lethal. You lose the ability to smell it after exposure to high concentrations of it.
Apply heat gold will melt faster.
If the white powder is sodium carbonate, when you react it with HCl, you will get carbon dioxide gas given off as one of the products of the reaction.. this gas is odorless.
If the white powder is Zinc Sulphide, when you react it with HCl, you will get sulphur dioxide gas given off as one of the products of the reaction, this gas smells like rotten eggs and is toxic.
As for the Zinc Gold mixture, you can use different methods of extraction.. both have different melting points.. you can melt the metal with the lower melting point and pour it off, or you can add a strong acid such as Sulphuric Acid to react with the mixture... Pure Gold will not react to the mixture, all the Zinc will react (in presence of enough acid) and become a salt that is soluble in water... then you just filter the gold out from the solutionHow can one separate gold from a mixture of zinc and gold? Also, how can one determine whether a white powder?
Well commenting on Paka the gas formed by the reaction of HCl to ZnS is not sulfure dioxide its hydrogen sulfide or H2S Report Abuse
Q1. Dissolve the material in a stong acid like Nitric or sulfuric acid. The Zinc should dissolve but the gold will not.
Q2. In reaction with hydrochloric acid both Zinc Sulfide and Sodium Carbonate will react- Na2CO3 forms an odorless colorless gas. ZnS will form hydrogen sulfide gas which stinks to high heaven. That would be my qualitiative test. Be careful doing this reaction in lab, as Hydrogen sulfide is a toxic gas that can be lethal. You lose the ability to smell it after exposure to high concentrations of it.
Apply heat gold will melt faster.
Were can i get Zinc metal powder?
were can i get zinc metal (powder)
i need it a since experiment.
does any one now how or were i can get it?Were can i get Zinc metal powder?
Go to www.ebay.com, and search for ';zinc powder';. At the moment, there are a number of sources listed, many at reasonable prices. See below for a direct link (Be sure what you buy is the metal powder, not one of the compounds. Zinc metal powder or zinc dust).
Added note: Contrary to what's been said (at least in the USA) obtaining such materials as zinc powder and most other chemicals is not at all difficult if you are a commercial or educational buyer. Lab supply houses will happily sell to commercial, industrial, or educational customers. For certain items, shipping may be difficult or expensive, however
Many suppliers are unwilling to sell chemicals to private persons (for a number of good reasons), but in general the purchase of most chemicals by individuals is still legal (at least in the USA). While the major suppliers will not sell to you as an individual, there are some specialty suppliers for many materials. Ebay is a good first place to try. Failing that, try ceramic and pottery suppliers and other sources such as www.skylighter.com or www.firefox.com. Note that these sources in general will sell only to persons of legal age, however.Were can i get Zinc metal powder?
It is extremely hard to get zinc powder these days, due to its high flammability. You can try a laboratory supplier, but even lecturers and researchers have a hard time getting it.
Any scientific catalog. e.g. Fischer or Merck.prescription cream
i need it a since experiment.
does any one now how or were i can get it?Were can i get Zinc metal powder?
Go to www.ebay.com, and search for ';zinc powder';. At the moment, there are a number of sources listed, many at reasonable prices. See below for a direct link (Be sure what you buy is the metal powder, not one of the compounds. Zinc metal powder or zinc dust).
Added note: Contrary to what's been said (at least in the USA) obtaining such materials as zinc powder and most other chemicals is not at all difficult if you are a commercial or educational buyer. Lab supply houses will happily sell to commercial, industrial, or educational customers. For certain items, shipping may be difficult or expensive, however
Many suppliers are unwilling to sell chemicals to private persons (for a number of good reasons), but in general the purchase of most chemicals by individuals is still legal (at least in the USA). While the major suppliers will not sell to you as an individual, there are some specialty suppliers for many materials. Ebay is a good first place to try. Failing that, try ceramic and pottery suppliers and other sources such as www.skylighter.com or www.firefox.com. Note that these sources in general will sell only to persons of legal age, however.Were can i get Zinc metal powder?
It is extremely hard to get zinc powder these days, due to its high flammability. You can try a laboratory supplier, but even lecturers and researchers have a hard time getting it.
Any scientific catalog. e.g. Fischer or Merck.
How do you seperate zinc powder and sodium chloride?
Its simple
Just add water and warm the solution
Make sure that the water is not acidic or basic bcoz as zinc is amphoteric it dissolves in both
Now NaCl dissolves in pure water whereas zinc doesnt
Filter the soln and separate Zn and dry it to get back NaClHow do you seperate zinc powder and sodium chloride?
Add warm water to dissolve the salt and filter off Zn or decant off the salt soln.
Just add water and warm the solution
Make sure that the water is not acidic or basic bcoz as zinc is amphoteric it dissolves in both
Now NaCl dissolves in pure water whereas zinc doesnt
Filter the soln and separate Zn and dry it to get back NaClHow do you seperate zinc powder and sodium chloride?
Add warm water to dissolve the salt and filter off Zn or decant off the salt soln.
Potassium manganate(VII) is heated with liberation of oxygen and reacts with zinc powder.?
what is the amount of oxygen that would react with 2g of zinc powder at the room conditions?
RAM:Zn=65,O=16,I mole gas at room conditions=24 dm3Potassium manganate(VII) is heated with liberation of oxygen and reacts with zinc powder.?
0.49 gm
0.37 dm^3Potassium manganate(VII) is heated with liberation of oxygen and reacts with zinc powder.?
2/65 x 1/2 x 32 for the mass.
2/65 x 1/2 x 24 for the volume
RAM:Zn=65,O=16,I mole gas at room conditions=24 dm3Potassium manganate(VII) is heated with liberation of oxygen and reacts with zinc powder.?
0.49 gm
0.37 dm^3Potassium manganate(VII) is heated with liberation of oxygen and reacts with zinc powder.?
2/65 x 1/2 x 32 for the mass.
2/65 x 1/2 x 24 for the volume
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