Cooling Glove test

Wear nitrile gloves, laboratory coat, and eye protection. Work in the fume hood. Dilute the solution of cyanide with water to a concentration not greater than 2%. For each 50 mL of solution, slowly add, while stirring, 5 mL of 10% sodium hydroxide solution, and 60-70 mL of household bleach. Test the solution for continued presence of cyanide as follows. Remove about 1 mL of the solution and place in a test tube. Add 2 drops of a freshly prepared 5% aqueous ferrous sulfate solution. Boil the mixture for 30 seconds, cool to room temperature, and add 2 drops of 1% ferric chloride solution. Acidify the mixture to litmus with 6 M hydrochloric acid (slowly add concentrated acid to an equal volume of cold water). If cyanide is still present, a deep blue precipitate forms. If the test... 

Potassium Cyanide Solutions. Wear breathing apparatus, eye protection, laboratory coat, and butyl rubber gloves. Instruct others to keep a safe distance. Cover the spill with a 1 1 1 mixture by weight of sodium carbonate or calcium carbonate, clay cat litter (bentonite), and sand. Scoop the mixture into a container and transport to the fume hood. Slowly, and while stirring, add the slurry to a pail containing household bleach (about 70 mL/g of cyanide). Test the solution for the presence of cyanide using the Prussian blue test. To 1 mL of the solution, add 2 drops of a freshly prepared 5% aqueous ferrous sulfate solution. Boil the mixture for at least 60 seconds, cool to room temperature and add 2 drops of 1 % ferric chloride solution. Add 6 M hydrochloric acid (prepared by... 

Wear eye protection, laboratory coat, and nitrile rubber gloves. In the fume hood, behind a shield, cautiously add silver azide to a large excess of cold ceric ammonium nitrate solution (about 66 mL/g azide) with agitation sufficient to provide suspension of all solids. Cool the reaction. When reaction is complete (see spillage disposal for test for completeness of reaction), wash solution into the drain with water.7 Large amounts of silver salts may be worth recovering. 

Three 100-mL beakers, wide-necked test tubes and test tube holder, glass rods, heating plate, large petri dish, melting point apparatus, thermometer, balance, cooling bath, spatula, funnel with fluted filter paper, safety glasses, protective gloves. 

Reactions with dilvite sulfuric acid are similar. The reaction of copper with concentrated sulfuric acid can be demonstrated by the teacher in a fume cupboard. Goggles and chemical resistant gloves must be worn. Heat 1 g of copper turnings with 1 cm sulfuric acid - sulfur dioxide will be evolved. To dispose of the mixture, place cooled test tubes into a bowl of cold water. 

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