id	author	title	date	pages	extension	mime	words	sentence	flesch	summary	cache	txt
stem-3405	B., Usmanova M.; D., Isroilova G.; O., Mavlanova N.; X., Maxammadiyeva S.; G., Zarpullaeva G.	Study of Analysis of Purified and Water for Injection	2024	2	.htm	application/pdf	1044	41	59	4) Carefully withdraw 5 ml of water for injection when we put a freshly prepared solution of diphenylamine blue color was not formed, this water contains nitrate and the absence of nitrites was known 5) 0.15 ml of Nessler's reagent per 10 ml of injection water 0.002ml of NH4+ ion in 1ml after 5 minutes 1 ml of stored standard is diluted with 9 ml of ammonia water and Compared to a mixture consisting of 0.15 ml of Nessler's reagent should not be darker than the color of the tested solution,due to the content of 0.00002 ammonium ions. 6) 0.5 ml of nitric acid solution in 10 ml of water for injection and Add 0.5 ml of silver nitrate solution and shake for 5 minutes we put it and it didn't even blur without power, that's the reason did not become cloudy due to the load of chlorides. 7) 0.5 ml of diluted hydrochloric acid and 1 ml per 10 ml of water We added barium chloride solution and shook it for 10 minutes We left it so that the solution should not be cloudy, and that's it and 1 ml http://www/ mailto:usmanovamarhabo24@gmail.com 506 AMERICAN Journal of Language, Literacy and Learning in STEM Education www. grnjournal.us of ammonium chloride to the same amount of water solution and 1 ml of ammonia solution and 1 ml of ammonium oxalate We added the solution, shook it and left it for 10 minutes the solution did not become cloudy in this process either.	cache/stem-3405.htm	txt/stem-3405.txt