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A chemical substance is any material with a definite chemical composition, no matter where it comes from. Hill, J. W.; Petrucci, R. H.; McCreary, T. W.; Perry, S. S. General Chemistry, 4th ed., p5, Pearson Prentice Hall, Upper Saddle River, New Jersey, 2005. For example, a sample of water has the same properties and the same ratio of hydrogen and oxygen whether the sample is isolated from a river or made in a laboratory. A pure substance cannot be separated into other substances by any mechanical process,Ebbing, D. D.; Gammon, S. D. General Chemistry, 7th ed., p12, Houghton Mifflin, Boston, Massachusetts, 2002.. Typical chemical substances found in the home are water, salt (sodium chloride) and sugar (sucrose). Generally, substances exist as solid, liquid, or gas, and may change between these phases of matter with changes in temperature or pressure.
The concept of chemical substances was established in the eighteenth century by the chemist Joseph Proust. He did careful studies of the composition of some pure chemical compounds such as basic copper carbonate Hill, J. W.; Petrucci, R. H.; McCreary, T. W.; Perry, S. S. General Chemistry, 4th ed., p37, Pearson Prentice Hall, Upper Saddle River, New Jersey, 2005. He deduced that: "All samples of a compound have the same composition; that is, all samples have the same proportions, by mass, of the elements present in the compound". This became known as the law of constant composition, and it is one of the foundations of modern chemistry.
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Water Treatment :: Kitchen and Dining
⺠Chemicals Collide - Boys Like Girls
kannsky (Kannia Rifatulzia) Sun, 20 Dec 2009 06:46:13 -0000
► Chemicals Collide - Boys Like Girls
Pet care without toxic chemicals (and rescue organizations!) http://bit.ly/4FHDrM #pets
marisa_herrera (Marisa Herrera) Sun, 20 Dec 2009 06:42:14 -0000
Pet care without toxic chemicals (and rescue organizations!) http://bit.ly/4FHDrM #pets
RT: @RawBoutenkos Parasites and humans have lived together for thousands of years, but chemicals are killing us now.
mirandababy (mirandababy) Sun, 20 Dec 2009 06:37:36 -0000
RT: @RawBoutenkos Parasites and humans have lived together for thousands of years, but chemicals are killing us now.
@MZ_M10 what that got to do wit u not eatn meat nomore (via @J_Dayy)man they pumpin these animals with chemicals! I'm to young to die
MZ_M10 (Maryam Kirk) Sun, 20 Dec 2009 06:35:46 -0000
@MZ_M10 what that got to do wit u not eatn meat nomore (via @J_Dayy)man they pumpin these animals with chemicals! I'm to young to die
O yea im supa thru with meatî«î®yal can have it im not ready to die all these chemicals they giving chickens n cows! I never ate pork or fishî
MZ_M10 (Maryam Kirk) Sun, 20 Dec 2009 06:33:29 -0000
O yea im supa thru with meatyal can have it im not ready to die all these chemicals they giving chickens n cows! I never ate pork or fish
Protect your vehicles finish from salts and chemicals used to keep these nasty West Michigan roads clean! 10% off, giftcerts available!
RespectRoad (Jeff Johnson) Sun, 20 Dec 2009 06:28:47 -0000
Protect your vehicles finish from salts and chemicals used to keep these nasty West Michigan roads clean! 10% off, giftcerts available!
Supply Inc. - Manufacturer of a complete line of pool and spa chemicals.
Meta Description: [ Swimming pool chemicals at discount prices ]
Alden Leeds - Provides several full lines of swimming pool chemicals to the professionals in the pool business.
Algae Bar - An alternative to chlorine for swimming pools, koi ponds, hot tubs, spas, water gardens, and fountains.
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BioGuard - A manufacturer of pool and spa chemicals. Site includes problem water troubleshooting and pool triva monthly contest
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Confederate Chemicals - UK supplier of spa chemicals.
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Coral Seas - This site features information on Yellow Out, a ecologically-safe algae cleaner. Detailed information is also included at this site.
Crystal Clear Pool and Spa - Manufacturer and exporter of ECLIPSE3 swimming pool treatment.
Earth Science Laboratories Inc. - This site offers information on Non-Chlorine pool and spa care. Site includes interactive water testing and listing of dealers in your area.
fey Technical Services - UK supplier of commercial pool chemical dosing equipment.
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Focus Pools - Spa, pool, and hot tub chemicals.
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Jack's Magic Products Inc. - Manufactures a complete line of swimming pool stain removal and problem-solving chemicals.
JAJA Group, Inc. - This site provides a wealth of information including various uses for the company's calcium hypochlorite and other water treatment chemicals.
Meta Description: [ Custom manufacture import and export of commercial and industrial products including: glass, metal, plastic, wood, ceramic, porcelain, raw materials, health products, beauty supplies, candles, etc. ]
Laporte Water Technologies - Laporte Water Technologies manufacturers quality swimming pool spa products and accessories. Look for Leisure Time, GLB, Robarb, Blue Devil, and Applied Biochemists for pool spa water treatment.
Meta Description: [ PoolSpaCare.com is your online source for water care advice, products, and links to information for your pool and spa questions. When you want help online, it146s all here on our newly redesigned website. New features to the site include the interactive Water Test and a Hot Topics section with li... ]
Lawrason's Pool Products Inc. - Canadian manufacturer of Aqua brand swimming pool and Spa Life brand spa chemicals.
Nature2 - Provides alternative sanitation techniques for pools and spas using silver ions and low chlorine levels.
Meta Description: [ Swimming pool supply and filters that reduce harsh chemicals in pools and spas, Nature2 pool care is a natural purifier that sanitizes hot tubs & pools, reduces chlorine use and pool maintenance. ]
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Orenda Technologies, Inc. - Manufacturer of Clearview brand chemicals, including enzymes.
Pacific Sands - Eco-One spa care products. A simple, safe and inexpensive alternative to chlorine and bromine.
Perfect Pool and Spa - Pool and spa care software to monitor and adjust water chemistry.
Meta Description: [ Pool care, spa care and Hot Tub care software to monitor and adjust Saturation Index, PH, Calcium Hardness, Total Alkalinity, Free Chlorine, Total
Chlorine, Combined Chlorine, Bromine, Biguanide, Baquacil, Baquaspa, Copper and Stabilizer Conditioner. ]
PoolSoft - Water analysis software for swimming pools and spas.
Meta Description: [ Chemical water analysis software for commercial, public, municipal
and residential swimming pools and spas. Calculates all chemical dosages to balance and
sanitize the water. Ph, Alkalinity, Chlorine, etc. ]
Stain Eraser - Manufacture of the Stain Eraser.
Meta Description: [ an eraser that cleans any surface stain from your swimming pool or tile grout instantly using no chemicals ]
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