Documents about Safety Precautions

  • 6 Pages

    Plate Tectonics

    Alabama, GEO 101

    Excerpt: ... n Prince William Sound, Alaska on March 28, 1964 with a magnitude of 9.2 in the Richter scale. An earthquake is a rapid release of energy of plate tectonics. This energy converts to waves that radiate in all directions from the source of the earthquake. Earthquakes are the motion that occurs along faults. This motion of the faults can lead to large waves and the formation of tsunamis. In result of the Prince William Sound earthquake, a tsunami developed and took the lives of 110 people while the quake killed fifteen. Other ways plate tectonics affect the United States is by forming mountain ranges. The formation of the Rocky Mountains in the western United States came from the Pacific plate thrusting under the North American plate 30-75 million years ago . We can't avoid or prevent the movement of plate tectonics or the natural disasters that result from them, but there can be safety precautions taken to minimize destruction and death as well as research toward prediction. Since earthquakes are a result o ...

  • 10 Pages

    E1_Law_of_Multiple_Proportions

    Cornell, CHEM 2090

    Excerpt: ... )2 into copper(II) oxide, CuO, nitrogen dioxide, NO2, and molecular oxygen, O2, Cu(NO3)2(aq) CuO(s) + NO2(g) + O2(g) (unbalanced) (3) In the third step, CuO is converted to copper(II) chloride, CuCl2, by addition of hydrochloric acid, HCl, CuO(s) + HCl(aq) CuCl2(aq) + H2O(l) Zn, (unbalanced) (4) In the fourth step, CuCl2 is converted to copper metal, Cu, by reaction with zinc metal, (5) CuCl2(aq) + Zn(s) Cu(s) + ZnCl2(aq) The excess zinc metal is converted to zinc(II) chloride, ZnCl2, and molecular hydrogen, H2, by reaction with excess HCl, Zn(s) + HCl(aq) ZnCl2(aq) + H2(g) (unbalanced) (6) If the masses of these reactants and products are carefully determined, it is possible to use these data to show that the compounds of copper and bromine illustrate the law of multiple proportions. Safety Precautions : Safety goggles must be worn at all times while you are in the laboratory. Nitric and hydrochloric acids are corrosive and must be kept off skin and clothing. If you get it into your eye ...

  • 3 Pages

    E3ChemRxns

    Cornell, CHEM 2090

    Excerpt: ... (S2O32) to form a soluble complex ion [Ag(S2O3)23], releasing bromide ions (Br) into solution: 2" AgBr (s) + 4 Na + (aq) + 2 S2O3 (aq) # $ Ag(S2O3 ) 3" (aq) + 4 Na + (aq) + Br" (aq) # 2 (4) ! In this example, in which the ligands (S2O32) are anions, the complexation reaction is similar to an ordinary double-displacement metathesis reaction. When neutral ligands such as NH3 or H2O are involved, however, the reactions are better described as single-displacement reactions. For example, ammonia can displace chloride in solid zinc chloride (ZnCl2) to give a complex ion: ZnCl2 (s) + 4 NH 3 (aq) " # Zn(NH 3 ) 2+ (aq) + 2 Cl$ (aq) " 4 (5) Safety Precautions : ! Safety goggles must be worn at all times while you are in the laboratory. BaCl2 is quite toxic. Be sure to wash your hands after handling it. Chemical burns can result when 6 M HCl comes in contact with skin. If you spill 6 M HCl on your skin, immediately wash the affected area with water. Continue washing with water for 15 minu ...

  • 15 Pages

    E3_Chemical_Reactions

    Cornell, CHEM 2090

    Excerpt: ... s (Br-) into solution: AgBr(s) + 4 Na+(aq) + 2 S2O32(aq) Ag(S2O3)23(aq) + 4 Na+(aq) + Br-(aq) (4) In this example, in which the ligands (S2O32) are anions, the complexation reaction is similar to an ordinary double-displacement metathesis reaction. When neutral ligands such as NH3 or H2O are involved, however, the reactions are better described as single-displacement reactions. For example, ammonia can displace the chloride ion in solid zinc chloride (ZnCl2) to give a complex ion: ZnCl2(s) + 4 NH3(aq) Zn(NH3)42+(aq) + 2 Cl(aq) (5) Experiment 3: Chemical Reactions 22 Safety Precautions : Safety goggles must be worn at all times while you are in the laboratory. BaCl2 is quite toxic. Be sure to wash your hands after handling it. Chemical burns can result when 6 M HCl comes in contact with skin. If you spill 6 M HCl on your skin, immediately wash the affected area with water. Continue washing with water for 15 minutes. Have a classmate notify your instructor. NaOH is especially caustic to t ...

  • 10 Pages

    E1MultiPropsF08_Revised

    Cornell, CHEM 2090

    Excerpt: ... sses of the reactants and products can be determined. In combination with the results of part I, it should then be possible to show that the ! compounds of copper and bromine illustrate the law of multiple proportions. Safety Precautions : Safety goggles must be worn at all times while you are in the laboratory. Sodium hydroxide, sulfuric acid, and hydrochloric acid are all corrosive and must be kept off skin and clothing. If you get it into your eyes, immediately flush them with water for at least 15 minutes. If you spill it on your clothing, remove the affected clothing before rinsing with water for 15 minutes. Notify your lab instructor, who will assist you. Bromine gas is corrosive to all body tissues and may cause serious burns. Excessive inhalation of vapors may be very irritating and damaging to the respiratory tract and lungs. Perform any reaction that evolves Br2 gas in the fume hood. If you should accidentally inhale any Br2 gas, notify your instructor immediately. Flammable materials ...