The Students' Guide in Quantitative Analysis - Free Ebooks Library

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APPENDIX, ,,,, k^ S iLosuiphite .«^/i.r..-Pr.pared by mumg equal part by .vefghfofsoda-Hê and fmdy powdered cry.tall.ed .oc!>um I .^ An alcoholic solution of cochineal. '';il''^llr .«rf -^///«''' ...•.r/....-This is prepared by mi.ing equal paS by weightof finely powered granulated sugar and flowers of sulphur. ^ r- ^ (6) Ordinary granulated soda-lwu. APPARATUS. ^39 0) C-..«^«.A-.. ^.*-- of hard Bohemian glass, .o inches long and , inch internal diameter, drawn to a ponit. - Z)^^ree-l>nll, (>4uck U tubes, with glass stop-cock. (3) Aspirator. PREPARATtON. (0 Clean and fill the U tube with lo cubic centimeters of standard •acid. , p:ii f^,g tube as follows (I A loosely fittng piu„ o ' (,v jlê weighed portion , ,0 t^ inches of the '^yP'^^f^ ' ^'^^'ely i.ed with from 5 of the substance to be analyzed is mumateiy n . ^^ r .1 c>,o-ir- nntl sulohur mixture. UJ J^ ""' 'J" " i grams of the sugar ^"'^ ^"'P ^ ^^f^^-ie^t quantity of the hyposuU glared paper, or P-^'^:;; "^^^Xes oVt^^ tube then add the sub- ; phhe mixture to fill about lo '"^'^^^ ^' . ^ ^,^ carefully and knee to be analysed, as ^'° If ^^'/J^ f^f ^^ tube rinse off ; pour into the tube shake ; ^^-^;V Xof Ue hyposulphite mix- ; to lo L paper or mortar with l^^^'^^Zt^tXy^l .o .^^^^ ture and pour into ^^^^^;^^^'\^\Z\.o.^^^ plug of ignited 2 inches of the end of the tuOe. w j^^,^ ^ê asbestos at the end of the tube. -^^'^-^ ^1 1 unUl there is a gas tube in a lôri-ntal pos.Uon a.d Up on tl^^^^ ^^^^^^^ .^^ ^^.^^ ^^^ channel all along the top of the tuê. the apparatus is U tube containing the acid, aspirate, and see I t'S'^^- T,, .i» „rpn-ired combustion tube in the The Combustion.-V\^'^^ the PJ^^P^^" ^° ^^ ^^ „„t to burn the furnace, letting the open end project _ .^ .^ ^^^^^^j^^ cork. Commence by heatmg the soda-hme port>o ^^^^^^^^ ^^^ to a full red heat. Then ;^"^""P,f,;,^tm, off two or three a outer end of the tube, so that the bubble.
I second, Whrn APPENDIX. the whole Uibe is red hot and the evolution of Ihe gas f hen he v,t ^^^^^ ^ .^^^ ^^ ^^^^^^^ ^^^^^^^^ ^^^^ [^rl^^^S^'-toU. o.her U.b or the U tube...... r h^nd of the tube, n.d dr.w . -rrent o a. .oug or a fe. • ... Dptich the U tube and wash the contents into a Ueaker :;;':::da°t:l add a few drops or the cochineal solution, and titrate. DETERMINATION I5Y THE SODA-LlMF. METHOD. Select a tube of hard glass 14 to 16 inches long, draw one end of it to a fine point, and to the other end fit a cork, throu-h which is passed a tube bent at right angles, the other end of wlilch passes through a cork closing lightly one arm of a 6-inch three-bulbed U tube with srhss stop-c'ock, Into the combustion tube first slip a loosely fitting plug of asbestos previously ignited, and then U to 2 inches of sodalime. Weigh out from 0.7 to 2.8 grams of the substance to be analyiied, and mix it on a piece of glazed paper or porcelain mortar with some finely pulverized soda-lime, and introduce the mixture into the combustion tube. The paper or mortar is tiien rinsed out with a small quantity of soda-lime and poured into the tube. The tube is then filled up to within i to 2 inches oi the open end with granulated soda-lime, then with a plug of ignited asbestos. A free passage is formed for the evolved gases by holding the tube in a horizontal position and tapjjing gently on the table. In- troduce the prepared combustion tube into the furnace, letting the open end project a little so as not to burn the cork, supporting the U tube by a clamp. The tube is then gradually heated, commencing at the fore part, nearest the cork, and progressing slowly towards the tail. The combustion should be conducted so as to obtain a steady and uninterrupted flow of gas. When properly carried out, the acid in the U tube is never colored. When the acid begins to recede attach the aspirator to the other limb of the U tube, and start it slowly, then break off the point of the combustion tube and draw a current of air through the apparatus for a few minutes, in order to sweep all the .ammonia into the acid. Detach the U tube and wash the contents into a beaker or ponx-tain basin, add a few drops of an alcoholic solution of cochineal, and titrate. The standard acid and alkali to be the same as that used in the Ruffle method.
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THE STUDENTS' GUIDE Quantitative An
Page 3 and 4:
-J O o p«5 O
Page 5 and 6:
PREFACE. The plan oi the Students'
Page 7 and 8:
vm LIST OP ANALVSES. ij. Guano. Ui(
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3j INTKODUCTOKV NOTES. The choice o
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Xli U'ORKS FOE REIEREN.CE ^KD FOR S
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j^ QUANTITATIVE ANALYSIS. the preci
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1^ QUANTITATfVE ANALYSIS, The secon
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iS (iLrANXri-ATIVE ANALYSI.-,, When
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2C QUANTITATIVE AKALYSIS. Rcactio>i
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22 QUANTITATIVE ANALYSIS. crucible,
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24 QUANTITATIVE ANAI^YSIS, these fl
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26 QUANTfTATIVE ANALYSIS. D— Dete
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2S QUANTITATIVE ANALYSIS. B. — De
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3° yaANTlTATlVE ANALYSIS.
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32 QUANTITATIVE ANALYSIS. crucible,
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34 QUANTITATIVE ANALYSTS. N.B.—Ma
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-5 QUANTITATIVE ANALVSIS. element w
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3$ a Bunsen burner ; QUANTITATIVE A
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VOLUMETRIC ANALYSIS. 4I solutions o
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ALKALIMETRV. 43 I-LjSO^ of sp. gr.
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finish with solution " No c,c. of N
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CHLORIMETRV. C Determine akohol by
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ILORIDE OF LIME. Valuation of Chlor
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TYPE METAL. ^t + « o " G ^t; « ti
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DETERMINATION OF 2IXC. E 53
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tf) ^ -I o a CHROMIC IRON OHtC. 55
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DETERMINATION OF ALKALIES. 57 which
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SOLUBLE SILICATES. 59 5
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-C o o '5 to 50 W) . is ^ w„ bo N
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TITANIPEtlOOS IRON ORE. 63
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-3 - /- '(C = r^ [jj J ,^ ^, w ^ "^
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NOTES TO THE PRECEDING SCHEME. 6f N
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In boilinc? NOTliS TO THE PRECEDING
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NOTES TO THE PRECBDISG SCHEME, Vonr
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NOTES TO THE PRECEDING SCHEME. 73 w
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PLIGHTS METHOD. 75 c n — r- t, a
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NOTES TO TIIIC PRKCEDING SCHEME. 77
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DETERMINATION OF TOTAL CARBON. 79 w
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I DETERMINATION OF TOTAL CAKOON. 8i
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DETEliMKNATlON OF SULPHUK, ETC. 83
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DETERMINATION OF IRON MANGANESE, ET
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.&. a o Ho a etts jr ^ ^ id o y i;
Page 88 and 89: 2-i B 1 d o". 3 + o o o o 0 -^ orr-
Page 90 and 91: POTABLE WATER. 9I E.—Calculation.
Page 92 and 93: POTABLE WATEK. 93 residue of NaCl+K
Page 94 and 95: L POTABLE WATER, 95 geii. To standa
Page 96 and 97: POTABLE WATER. 97 0.152 grains Na c
Page 98 and 99: SPECIFIC GRAVITIES OF SOLIDS AND LI
Page 100 and 101: OROANIC ANALYSIS. w'— F Sp. gr. =
Page 102 and 103: OKGANIC ANALYSIS. I03 (13) Sundry a
Page 104 and 105: BKTKRMINA'I'ION OF NITROGEN. los Of
Page 106 and 107: DETERMINATION OF NITROGEN. 107 D.
Page 108 and 109: ANALYSIS OF UlUNE. IO9 0.315 grms.
Page 110 and 111: ANALYSIS OF URINK. II I These subst
Page 112 and 113: ANALYSIS OF URINE. 113 2. Test witj
Page 114 and 115: ANALYSIS OF URINE. 11$ C. — Hcint
Page 116 and 117: DETERMINATION OF URINK. 117 filter
Page 118 and 119: DETERMINATION OF SUGAR, 119 A conve
Page 120 and 121: DETERMINATION OF GRAPE SUGAR. 121 T
Page 122 and 123: DISTILLATION OF PETROLEUM, i^t of a
Page 124 and 125: THE ELEMENTS, Naoie. Aluminium Anti
Page 126 and 127: Report of Analysis of Determination
Page 128 and 129: APPENDIX. 129 subsequently maintain
Page 130 and 131: APPENDIX. 131 excess, thus precipit
Page 132 and 133: APl'ENDfX. 133 METHOD FOR THE DETER
Page 134 and 135: APPENDIX, Battle and Daticy. of the
Page 136 and 137: APPENDIX, 137 (14) The stand for ho
Page 140 and 141: Aeidimcuy, 45- Albumen ( dctcrminnl
Page 142: Sulphoiic iicid in poLiblc watef, d
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