Various brands of chlorine based bleaches biology essay

The first recycled paper dates back almost 2, years to when a Chinese court official, Ts'ai Lun, developed paper made from rags, old fishing nets, hemp and China grass for the Chinese Royal Court in the second century.

Various brands of chlorine based bleaches biology essay

Greenish-yellow liquid Specific Gravity: Sodium hypochlorite produced by a continuous process will have approximately 0. The presence of transition metal ions copper and nickel is known to catalyze the decomposition of liquid sodium hypochlorite, contributing to the loss of bleach strength and the formation of oxygen.

Loss of sodium hypochlorite strength means more product will be needed when the bleach is used as a disinfectant.

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It is used extensively as a bleaching agent in the textile, detergents, and paper and pulp industries. It is also used as an oxidizing agent for organic products.

In the petrochemical industry, sodium hypochlorite is used in petroleum products refining.

Various brands of chlorine based bleaches biology essay

Large quantities are also used as a disinfectant in water and wastewater treatment and sanitary equipment. In food processing, sodium hypochlorite is used to sanitize food preparation equipment, in fruit and vegetable processing, mushroom production, hog, beef and poultry production, maple syrup production, and fish processing.

In various parts of the world, sodium hypochlorite strength is identified using five common definitions that result in different numbers although the oxidizing power is the same, i.ADVANCED SUBSIDIARY GCE CHEMISTRY A F Atoms, Bonds and Groups 3 A student used the internet to research chlorine and some of its compounds.

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(a) Chlorine reacts with sodium hydroxide to form bleach in another disproportionation reaction. In fact, a study published in Environmental Engineering and Management Journal found that discharge from chlorine-bleaching was “the most significant environmental issues” in pulp and paper mills.

In contrast, oxygen-bleaching requires less manufacturing and is better for the environment. Detergent Physical Characteristics. The concentration at which micelles begin to form is the critical micelle concentration (CMC).

The CMC is the maximum monomer concentration and constitutes a measure of the free energy of micelle formation. Investigate how hydrogen-peroxide based hair treatments change the color of human hair. [ E ] The effects of sodium laureth sulfate, a chemical found in common shampoos, has . The following table shows how much bleach is needed to make up different concentrations of disinfectant based on an initial concentration of 5% (most store bought bleach sold in North America is rated at % but loses strength with time).

are applied in a stepwise fashion within a bleaching sequence.

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These include chlorine gas, chlorine dioxide, sodium hypochlorite, hydrogen peroxide, Bleaching of mechanical pulp is much different than that for chemical pulp.

Mechanical pulping wood pulp to be used for printing papers, tissues, and towelling. Papermaking.

What is Sodium Hypochlorite (Bleach)?