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Presentation on sodium salt & potassium salt

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Presentation on sodium salt & potassium salt

  1. 1. Presentation On Sodium Salt & Potassium salt Sodium Salt Potassium Salt
  2. 2. Group - 3 Md. Jahirul Islam 2014000300050 Md. Mahmudul Hasan 2014000300051 Ishtiaq Ahmed 2014000300052 Md. Tanvir Islam 2014000300053 Anisur Rahman 2014000300054 Jahirul Islam Jahir 2014000300055 Saeema Sultana 2014000300056
  3. 3. Sodium Salt Introduction: Sodium dichromate is the chemical compound with the formula Na2Cr2O7. However, the salt is handled as its dihydrate Na2Cr2O7·2H2O. Virtually all chromium ore is processed via conversion to sodium dichromate. Reaction: 2 Cr2O3 + 4 Na2CO3 + 3 O2 → 4 Na2CrO4 + 4 CO2
  4. 4. Preparation: Sodium dichromate is generated on a large scale from ores containing chromium(III) oxides. The ore is fused with a base, typically sodium carbonate, at around 1000 °C in the presence of air (source of oxygen). Step 1: Solubilizes the chromium and allows it to be extracted into hot water. At this stage, other components of the ore such as aluminium and iron compounds, are poorly soluble.
  5. 5. Step 2: Acidification of the resulting aqueous extract with sulfuric acid or carbon dioxideaffords the dichromate, which is isolated at the dihydrate by crystallization. Step 3: A variety of hydrates of this salt are known, ranging from the decahydrate below 19.5 °C as well as hexa-, tetra-, and dihydrates. Above 62 °C, these salts lose water spontaneously to give the anhydrous material.
  6. 6. Final Step: Secondary alcohols are oxidized to the corresponding ketone, e.g. menthol to menthone ; dihydrocholesterol to cholestanone: 3 R2CHOH + Cr2O7 2- + 2 H+ → 3 R2C=O + Cr2O3 + 4 H2O
  7. 7. Potassium Salt Introduction: Potassium chloride occurs naturally as sylvite, carnallite, and potash, and it can be extracted from these ores. Reaction: KOH + HCl → KCl + H2O 2 K + Cl2 → 2 KCl
  8. 8. Preparation: Potassium chloride is inexpensively available and is rarely prepared intentionally in the laboratory. 1) It can be generated by two routes that are of instructive but not practical value: One way is to treat potassium hydroxide (KOH) with hydrochloric acid. KOH + HCl → KCl + H2O
  9. 9. 2) This conversion is an acid-base neutralization reaction. The resulting salt can then be purified by recrystallization. 3) Another method would be to allow potassium to burn in the presence of chlorine gas, also a very exothermic reaction: 2 K + Cl2 → 2 KCl
  10. 10. Uses: Medical use of Sodium chloride: Tablets: Sometimes, there is excessive loss of sodium from our body due to dehydration or excess sweating. Intravenous saline (IV): One of the properties of salts is that it rises blood pressure Ophthalmic ointment: In some cases, solution of sodium chloride is used to treat swelling of cornea in the eye.
  11. 11. Potassium Salt: This medication is a mineral supplement used to treat or prevent low amounts of potassium in the blood. Potassium chloride should be used with caution in the elderly, those with kidney problems, heart problems, conditions causing a narrowing or blockage of the gut (intestine), stomach ulcer, hiatus hernia, metabolic acidosis nad those with Addisons disease.
  12. 12. Any Question?
  13. 13. To Everyone

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