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23 Cards in this Set
- Front
- Back
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Purpose Of Lab
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quick way to identify elements (especially metals) contained in a compound
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How Does This Lab Work
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a small sample of the compound is placed in a well-tuned Bunsen burner flame and the chemical color reaction is examined and compared
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Why Do The Flames Change Color?
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the heat from the flame causes the energy levels of the electrons in the atoms to rise; the energy lebels lower and the electrons emit the energy difference as photons; photons are emitted at a specific energy for each element
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What Chemicals Were Tested?
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Lithium, Aluminum, Potassium, Nickel, Copper, Silver, Barium, the negative control, and the unknown substance
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What Tools Did You Need?
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Beakers, Chemicals, Paper Clips, Bunsen Burner, Goggles, Aprons
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Lithium (Li)`
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red flame
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Aluminum (Al)
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orange sparks
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Potassium (K)
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light blueish lavender flame with white sparks
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Nickel (Ni)
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orangey yellow flame
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Copper (Cu)
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bright green
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Silver (Ag)
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white loop; dark blue flame with some white
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Barium (Ba)
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yellow with orange
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Negative Control
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orange loop
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Unknown Substance
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yellow and orange flame
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Properties of Barium (Ba)
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found in soils and foods at low levels; can cause convulsions, hallucinations, nausea, cramps, and paralysis; toxic in water-soluble form at slightly less than 1 gram
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Charac. of Lithium
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Li: necessary to neurological funtion;deficient amount= bi polar; part of lithal injection; disrupts nervous system, prevents lung and heart function; used in batters and psychiatric settings
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Charac. of Aluminum
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Al: used in soft drink cans, car engines, airplane frames, and cookingware; heavy and prolonged exposure causes stuttering, seizures, comas, bone disorders, liver damage, and blood clots leading to strokes and heart attacks; most commonly found in industrial settings
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Charac. of Potassium
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K: vital role in brain function; deficiency causes seizures and neurological disorders; large quantities toxic and stop heart and breathing and prevent brain from communicating with body
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Charac. of Nickel
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Ni: high doses cause nausea, abdominal cramps, diarrhea, headache, and shortness of breath; sometimes used in refineries
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Charac. of Copper
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Cu: essential to life; helps carry oxygen in blood, active site of enzymes, helps neurotransmission, necessary for the synthesis of adrenaline; liver damage, personality changes, nausea, psychosis, and anemia; overdose can be caused by medications, environmental factors, and smoking; common in electrical industries
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Charac. of Silver
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Ag: heavy and prolonged exposure causes liver disease, convulsions, paralysis, and kidney disease; used in the photographic industry
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Charac. of Barium
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Ba: found in low levels in soils and food; high levels cause convulsions, hallucinations, nausea, cramps, and paralysis; toxic in water soluble form
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Charac. of Lead
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Pb: similar to barium and mercury; causes vomiting, convulsions, cramps, and paralysis; used in pipes and paint and can leach to water supply
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