bleaches‚ sodium hypochlorite (NaOCl) and calcium hypochlorite Ca(ClO)2 are the oxidizing agents. Before titration‚ the mass of the bleach is weighed out for each trial and recorded‚ approximately 0.4-0.6 grams. After the bleach sample is weighed‚ bleach is poured into a beaker with several aliquots of distilled water to completely wash the bleach out. Next‚ 3 M KI is added to the beaker‚ then 3 M H2SO4 is poured into the bleach with 5 drops of
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STERILIZATION OF WATER USING BLEACHING POWDER A CHEMISTRY INVESTIGATORY PROGECT ANSHUL KUMAR PANDEY XII B [THIS PROJECT LOOKS AT THE TECHNIQUE CALLED STERILIZATION OF WATER USING BLEACHING POWDER WHICH IS USED TO PURIFY WATER AND MAKES IT FIT FOR DRINKING.] Downloaded from www.icbse.com INDEX 1. Certificate of Authenticity 2. Acknowledgement 3. Introduction -Need of Water -Purification of Water -Need for a stable purification technique 4. Theory -History of Water purification -Bleaching
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8% or more acetic acid to descale the appliance‚ as this may cause damage. http://www.diynot.com/forums/viewtopic.php?t=30088#axzz2Bph0xR9a Citric acid will do a better job than the acetic acid in vinegar. That’s because calcium citrate dissolves in water whereas calcium acetate forms an insoluble layer between the scale and the vinegar. You can buy citric acid crystals from home brew shops. A teaspoon of acid in a kettle of water is a good start and you can speed things up enormously by boiling
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The Element: Chlorine General Information We researched the chemical element known as chlorine. Chlorine has an atomic number of 17 and an atomic weight of 35.453. It has a valence number of 3. The element has 3 energy levels. Chlorine exists as a greenish-yellow gas at normal temperatures and pressures. Chlorine is second in reactivity only to fluorine among the halogen elements. Chlorine is a nonmetal. It is estimated that 0.045% of the earth’s crust and 1.9% of sea water are chlorine.
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antacid for hyperchlorhydria • for intestinal toxemia CALCIUM-CONTAINING ANTACIDS • dependent upon their basic properties • raise stomach pH to 7 • constipating • found in combinations with magnesium antacids 1. CALCIUM CARBONATE • precipitated chalk • fast action • found in combinations with Mg antacids • in Lozenges and Oral suspension 2. TRIBASIC CALCIUM PHOSPHATE • Precipitated Calcium Phosphate‚ Tertiary Calcium
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Some common antiseptics[edit] A bottle of ethanol (95%) - an antiseptic Alcohols Most commonly used are ethanol (60–90%)‚ 1-propanol (60–70%) and 2-propanol/isopropanol (70–80%) or mixtures of these alcohols. They are commonly referred to as "surgical alcohol". Used to disinfect the skin before injections are given‚ often along with iodine (tincture of iodine) or some cationic surfactants (benzalkonium chloride 0.05–0.5%‚ chlorhexidine 0.2–4.0% or octenidine dihydrochloride 0.1–2.0%). Quaternary
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Mechanisms of Acetaminophen-lnduced Liver Necrosis By Jack A. Hinson‚ Dean W. Roberts‚ and Laura P. James Acetaminophen (paracetamol‚ N-acetyl-p-aminophenol; APAP) is widely used as analgesic and antipyretic drug. At therapeutic doses‚ acetaminophen is safe to be used. Acetaminophen other than aspirin and ibuprofen has only weak anti-inflammatory properties. At higher doses‚ acetaminophen produces a centrilobular hepatic necrosis that can be fatal. Acetaminophen-lnduced Hepatotoxicity Observation/
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environment dust free‚ balanced diet rich in calcium and iron Avoid the use of lead based paint Asbestos Construction materials‚ manufactured goods Lung disease‚ mesothelioma‚ asbestosis‚ lung cancer unknown Use protective masks or other equipment when doing construction work Not applicable Pesticides Products used to kill household pests Damage to central nervous system‚ cancer yes Avoid the use of them entirely Not applicable Sodium Hypochlorite Bleach Pulmonary edema‚ vomiting or coma yes
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Naming Chemical Compounds General Information: Scientists all around the globe use a standard method for naming chemical compounds. The standards were set up by an international committee sponsored by the International Union of Pure and Applied Chemistry (IUPAC). Having this standard makes life easier for people who use these compounds everyday. It would be tough to set up any experiment if scientists everywhere used different names for the same compound. It would also make the lab a
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first (positive ion) Write the symbol and charge of the anion next (negative ion) Use criss-cross rule to balance for an electrically neutral compound. Name Symbol and Charge Na+ Mg2+ ClO2Formula NaCl MgO 1. 2. Sodium cloride Magnesium oxide Calcium bromide Aluminum sulphide Nickle (III) chloride (indicates charge) 3. CaBr2 4. Al3+ Ni3+ S2Cl- Al2S3 5. NiCl3 6. Sodium thiosulphate (complex ion) Na2S2O3 7. Aluminum silicate (complex ion) Al2(SiO3)3
Free Ion Sodium chloride Chlorine