Hazardous in case of skin contact corrosive sensitizer permeator of eye contact

Hazardous in case of skin contact corrosive

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Hazardous in case of skin contact (corrosive, sensitizer, permeator), of eye contact (corrosive), of inhalation (lung sensitizer). Non-corrosive for lungs. Liquid or spray mist may produce tissue damage particularly on mucous membranes of eyes, mouth and respiratory tract. Severe over-exposure can result in death. hydrogen peroxide : very hazardous in case of skin contact (irritant) and of eye contact(irritant). Hazardous in case of skin contact (corrosive),of eye contact (corrosive) and of ingestion. Slightly hazardous in case of inhalation (lung sensitizer). Liquid or spray mist may produce tissue damage particularly on mucous membranes of eyes, mouth and respiratory tract. Skin contact may produce burns. Prolonged exposure may result in skin burns and ulcerations. Methanol (Methyl alcohol): highly flammable; toxic if swallowed, inhaled, or in contact with skin; causes damage to organs Aqueous ammonia (Ammonium hydroxide): causes severe skin burns and eye damage; may cause respiratory irritation; very toxic to aquatic life !
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11/8/19, 1’06 AM Coordination Compounds Page 10 of 23 either compound and discuss both in your lab report. Compound A Reaction Overview In this experiment you will react a solution of cobalt(II) chloride and ammonium chloride with concentrated ammonia, which is a complexing agent. In the absence of a complexing agent, the oxidation of would be unfavourable. You will then slowly add hydrogen peroxide and gently heat the solution. will oxidize to , and heating will remove any excess . You will then chill the solution and react it with concentrated hydrochloric acid. After the addition is complete, you will heat and stir the solution until a precipitate forms. You will then chill the solution and filter the product by vacuum filtration. Chilling the solution will lower the solubility of the precipitate and increase the yield of your reaction. Detailed Procedure Borrow a magnetic stir bar from the store window (bring your student ID card). From a dispenser or common burette, take 10 mL of cobalt(II) chloride solution into a 125 mL Erlenmeyer flask. Carefully add the magnetic stir bar to the flask. Verify that the vacuum line is working properly. The water trap must be 2/3 filled with tap water. Ask your TA if you are not sure. Prepare a large cotton plug to fit into the mouth of the Erlenmeyer flask – it should fit closely but not too tight. The plug will prevent ammonia fumes from leaking out into the lab without tightly sealing the flask. Take the flask and cotton plug to the ammonia dispenser and add about 5 mL of concentrated ammonia directly into the cobalt chloride solution. Quickly replace the cotton plug and record your observations in Table 1. Clamp the reaction flask to [Co ] ( O) H 2 6 + 2 H 2 O 2 Co 2 + CO 3+ H 2 O 2 Safety Warning Fumes from ammonia and hydrochloric acid are present in this experiment. Follow instructions carefully and work in a fume hood or under an aspirator arm.
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