purchase of lab. chemical / apparatus-2 hydrometer with temperature scale ( 0-10 ) npl certified merc 3 hydrometer with temperature scale ( 10-20 ) npl certified merc 4 ph meter digital ( pen type ) elico 5 tds meter digital ( pen type 1-1000 ) elico 6 lime baumme ( 0-10 ) qualygens 7 syrup baumme ( 20-40 ) 8 thermometer yellow ( 10-120 deg.c. ) merc / qualygens 9 test tube 10 ml ( borosil ) borocil 10 tissue paper roll 11 filter paper ( size 18.5” ) milton roy 12 g.i tray 18” 13 whattman ph filter paper sheet grade-i qualitative ( 460 mm×570 mm ) qualygens 14 beaker 250 ml borocil 15 beaker 500 ml borocil 16 conical flask 250 ml 17 plastic jar for sample ( wide mouth with lid of 250 ml quantity ) 18 poltube 100 mm milton roy 19 pol tube 200 mm milton roy 20 plain glass for pan station ( size 105 mm × 80 mm ) 21 disposable gloves ( latex ) 22 acid ( commercial hcl ) npl certified merc / qualygens 23 thymol blue indicator solution merc / qualygens 24 universal ph indicator bottle ( ph range 0-14 ) merc / qualygens 25 lead subacetate merc 26 fehling solution a merc 27 fehling solution b merc 28 bromothymol blue indicator powder ( ph range 6.0-7.6 ) merc quality 29 alpha napthol powder merc quality 30 ammonia solution of c.p. quality merc / qualygens 31 distilled water merc / qualygens 32 ph indicator paper ( range 1-14 ) 33 hydrochloric acid ( sp. gravity 1.1029 ) 34 erichrome black-t indicator powder 35 edta ( merck quality ) 36 n / 10 hcl acid solution merc / qualygens 37 sulphuric acid ( conc. ) 38 buffer tablets ph 4.0 ±0.05 39 buffer tablets 7.0 ±0.05 40 phenolphathalein indicator solution 41 methylene blue indicator solution 42 erichrome black-t indicator solution 43 methyl red indicator solution 44 sodium hydroxide flakes 45 pottasium ferrocyanide 46 pottasium iodide 47 0.1 n sodium hydroxide solution