Question

why lead acetate and cotton plug used in limit test of arsenic​

Answer 1

Answer:

hello... arey nahi didi hum bhule nahi hain apko...

Explanation:

vo toh offline rehte hain.. iss wajah se mulaqat nahi hoti...

hmm... happy new year in advance...

Answer 2

For the following reasons, lead acetate and cotton plug are used in arsenic limit tests:

• The arsenic limit test detects the quantity of arsenic in a sample by converting arsenic to arsine gas, which may be detected on mercuric chloride paper.
• Hydrogen sulfide, or H₂S gas, is produced as a contaminant during the reduction of arsenic to its gaseous form.
• Because hydrogen sulfide gas is hazardous to the environment, it should not be allowed to escape.
• As a result, during the limit test, a cotton plug is employed to catch this gas.
• To detect the presence of H₂S gas, the cotton plug is pretreated with lead acetate.
• Hence In the limit test for arsenic, lead acetate impregnated with cotton is employed.