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23 Cards in this Set

  • Front
  • Back
Purpose Of Lab
quick way to identify elements (especially metals) contained in a compound
How Does This Lab Work
a small sample of the compound is placed in a well-tuned Bunsen burner flame and the chemical color reaction is examined and compared
Why Do The Flames Change Color?
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
What Chemicals Were Tested?
Lithium, Aluminum, Potassium, Nickel, Copper, Silver, Barium, the negative control, and the unknown substance
What Tools Did You Need?
Beakers, Chemicals, Paper Clips, Bunsen Burner, Goggles, Aprons
Lithium (Li)`
red flame
Aluminum (Al)
orange sparks
Potassium (K)
light blueish lavender flame with white sparks
Nickel (Ni)
orangey yellow flame
Copper (Cu)
bright green
Silver (Ag)
white loop; dark blue flame with some white
Barium (Ba)
yellow with orange
Negative Control
orange loop
Unknown Substance
yellow and orange flame
Properties of Barium (Ba)
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
Charac. of Lithium
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
Charac. of Aluminum
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
Charac. of Potassium
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
Charac. of Nickel
Ni: high doses cause nausea, abdominal cramps, diarrhea, headache, and shortness of breath; sometimes used in refineries
Charac. of Copper
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
Charac. of Silver
Ag: heavy and prolonged exposure causes liver disease, convulsions, paralysis, and kidney disease; used in the photographic industry
Charac. of Barium
Ba: found in low levels in soils and food; high levels cause convulsions, hallucinations, nausea, cramps, and paralysis; toxic in water soluble form
Charac. of Lead
Pb: similar to barium and mercury; causes vomiting, convulsions, cramps, and paralysis; used in pipes and paint and can leach to water supply