Archive for August, 2009
Calcium hypochlorite Uses
Calcium hypochlorite
Calcium hypochlorite (known as ‘bleaching powder’) is also used for bleaching cotton and linen and is used in the manufacture of chloroform.
Other uses are: 1. As bathroom cleaner 2. Clean secondhand items 3. Glow to glass dish ware 4. Household disinfectant spray 5. Remove moss and alga 6. Sanitize garden tools 7. Kill weeds in walkways 8. Preserve the cut flowers fresh 9. Clean lawn furniture
Sodium Carbonate Uses
The manufacture of glass is the most important use of sodium carbonate. When combined with sand (SiO2) and calcium carbonate (CaCO3) and heated to very high temperatures, then cooled very rapidly, glass is produced. This type of glass is known as Soda lime glass.
Sodium carbonate is also used as a relatively strong base in various settings. For example, sodium carbonate is used as a pH regulator to maintain stable alkaline conditions necessary for the action of the majority of developing agents.[citation needed] It is a common additive in municipal pools used to neutralize the acidic effects of chlorine and raise pH.[1] In cooking, it is sometimes used in place of sodium hydroxide for lying, especially with German pretzels and lye rolls. These dishes are treated with a solution of an alkaline substance in order to change the pH of the surface of the food and thus improve browning.
In taxidermy, sodium carbonate added to boiling water will remove flesh from the skull or bones of trophies to create the “European skull mount” or for educational display in biological and historical studies.
In chemistry, it is often used as an electrolyte. This is because electrolytes are usually salt-based, and sodium carbonate acts as a very good conductor in the process of electrolysis. Additionally, unlike chloride ions which form chlorine gas, carbonate ions are not corrosive to the anodes. It is also used as a primary standard for acid-base titrations because it is solid and air-stable, making it easy to weigh accurately.
Electron Density of Na2CO3 computed with Ghemical/MPQC at the RHF 6-311G** level of theory.
Electrostatic potential of Na2CO3 computed with Ghemical/MPQC at the RHF 6-311G** level of theory.In domestic use, it is used as a water softener during laundry. It competes with the ions magnesium and calcium in hard water and prevents them from bonding with the detergent being used. Without using washing soda, additional detergent is needed to soak up the magnesium and calcium ions. Called Washing Soda, Soda crystals or Sal Soda[2] in the detergent section of stores, it effectively removes oil, grease, and alcohol stains. Sodium carbonate is also used as a descaling agent in boilers such as found in coffee pots, espresso machines, etc.[citation needed]
In dyeing with fiber-reactive dyes, sodium carbonate (often under a name such as soda ash fixative or soda ash activator) is used to ensure proper chemical bonding of the dye with the fibers, typically before dyeing (for tie dyes), mixed with the dye (for dye painting), or after dyeing (for immersion dyeing)
Save Children Burnt by Caustic Soda!
In Sierra Leone mothers use caustic soda to home-make soap, and children often exchange it for water and drink it. During 2008 alone, 249 children have been admitted in the surgical pediatric unit of the Emergency center in Goderich, near Freetown - a number twice higher than that recorded in 2007.
Patients who ingested caustic soda are subjected to periodic esophageal dilatation, which is the only way to give them the hope of autonomous nutrition and thus a life.
Emergency is an independent, neutral and non-political Italian organization, which provides free, high-quality medical and surgical treatment to the civilian victims of war, landmines, and poverty. It promotes a culture of solidarity, peace, and respect for human rights.
The Emergency hospital in Goderich (right) is the only place in the whole country where this procedure is possible. The endoscopes which have so far been used by surgeons there require urgent repair, and two new instruments have to be acquired, one for children and one for teenagers. The total cost of the operation is of about 26,000 US dollars.
If you are sitting on some extra money and if you care for the life of children wherever they live, you might consider contributing to the repair and purchase of endoscopes by donating money with your credit card at the Emergency web site. Please be sure to specify “Sierra Leone - programma di dilatazione” in the form.Black Christmas movies