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In 1947 a widespread outbreak of gastroenteritis in the UK caused the death of 4,500 children under the age of one. Many of these were in hospitals where the repeated sterilisation of glass baby bottles containing a small residue of milk by boiling them had resulted in invisible deposits of "milk stone"; these provided a medium for the growth ...
However, its lower molecular weight leads to a higher potential bleaching power. In the example of lithium hypochlorite, the molecular weight 58.39, so it only takes 58.39 grams (2.060 ounces) to equal the bleaching power of 70.90 grams (2.501 ounces) of dichlorine.
For example, the label of a household bleach product may specify "5% sodium hypochlorite by weight." That would mean that 1 kilogram of the product contains 0.05 × 1000 g = 50 g of NaClO . A typical oxidation reaction is the conversion of iodide I −
A 1-in-47 dilution of household bleach with water (1 part bleach to 47 parts water: e.g. one teaspoon of bleach in a cup of water, or 21 ml per litre, or 1 / 3 cup of bleach in a gallon of water) is effective against many bacteria and some viruses in homes. [33]
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Alkaline cleaning agents contain strong bases like sodium hydroxide or potassium hydroxide. Bleach (pH 12) and ammonia (pH 11) are common alkaline cleaning agents. Often, dispersants, to prevent redeposition of dissolved dirt, and chelants, to attack rust, are added to the alkaline agent.
Household bleach sold for use in laundering clothes is a 3–8% solution of sodium hypochlorite at the time of manufacture. Strength varies from one formulation to another and gradually decreases with long storage. Sodium hydroxide is usually added in small amounts to household bleach to slow down the decomposition of NaClO. [10]
Liquid bleach, often called just bleach, is a common chemical household product that consists of a dilute solution of sodium hypochlorite (NaClO) and other secondary ingredients. It is a chlorine releasing bleaching agent widely used to whiten clothes and remove stains, as a disinfectant to kill germs , and for several other uses.