Question

nat hazards are associated with the following reagents? What precautions should you use when you working with these substances? (a) 3 M HNO, (b) 0.1 M AgNO, (c) 6 MNH, 2. What will you observe when you have a positive test for: (a) HCO - (b) PO. 3. Why should you use distilled water to rinse your test tubes between tests? 4. How could you distinguish between a precipitate of AgCl and Agl? 5. What are the common household uses for the four consumer products being tested? Which anions are expected to be present in each?

Answer 1

1. a 3M HNOS. - any inorganic acido (rece, HNO₂, H₂ Sou etc) no matter the concentration, if inhaled or touch without gloves it can burn. Diluted acids sometimes may not I burn your hand immidiately but its better to râns as soon as possible. HNO3 con burn your skin, if inhaled, health risks that means corrosion of mucous membranes can occurs or even death. Contact with eyes con permanently damage cone cornea When working aith HNO3 you better neear safety gloves, safety glasses and lab coats. And wash with large amount of water if contacts with skin or any part of your body. b) O IM AGNO3. - It is a very dilute solution. So it has no direct sido side effects. But if you toch touch with your hand you will get black coloweed marks .I mean it can discolor your skin ar leave black marks. Excess exposure can cause headache, dizziness etc. Precautions are same as previous one. C) 6M NHz. It is a ve very carrosive Chemical. It inhale in large quantity com cause death can cause irritation of the nose and throat. The gas can burn skin and eyes.

Protection, near chemical safety goggles . And they to use gas mask and gloves , aprons and boots. 0 0 2. a) Ho²- What For positive test you will see air bubbles when a small amount of arid eded. Note that the HCO3-solution is prepared in water. The bubbles are due to the release of coa gas. b). POG3 - In case of phosphate ion if you add alidify sudium carbonate or a salt solution in water with cone. HNO3 and ammonium molybdate solution and heated you will get a canary yellow precipitate. Here actually for different tests you need different observation. I have 3. you should rinse test tubes with distilled water so that there is no ream remaining left from previour test. Without rinsing the test takes may hamper kamper your next tests. A. you add aqueous ammonia in both precipitate Agel teel'll dissolve in aq. amononia but Agr remains as it is 5. For this you have to mentioned the four consumable