A 0.501 g sample of sulfathiazole was assayed using diazotization with 0.1905M NaNO2 VS, using 18.7 mL of the titrant. Each mL of 0.1 M NaNO2 is equivalent to 25.53 mg of C9H9N3O2S2. What is the % purity?
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A 0.501 g sample of sulfathiazole was assayed using
diazotization with 0.1905M NaNO2 VS, using 18.7 mL
of the titrant. Each mL of 0.1 M NaNO2 is equivalent
to 25.53 mg of C9H9N3O2S2. What is the % purity?
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- An impure sample of KCIO, (FW = 122.5 g/mol) weighing 0.1353 grams was dissolved in 50.0 mL distilled water, added with KI & acid. The 1₂ formed was titrated with 38.00 mL of 0.1005 N Na₂S₂O3 with starch as indicator. Calculate the % (w/w) KCIO3 in the sample.10. A 0.514 gram sample of NazCO, (106.0 g/mol) was dissolved in distilled water in a 100.0 mi volumetric flask. The molar concentration of Na,CO, in solution is: 0.0485 M 0.0370 M b. 0.4849 M 0.0340 M 0.0330 M d. е.A 110.00 mL solution of 0.00195 M A3B2 is added to a 160.00 mL solution of 0.00155 M C3D4. What is pQsp for A3D2?
- 3..If a 0.2250g sample of 96.5% NaHCO3 is titrated with 0.1165N H2SO4, what volume of the acid was required to reach the end point?WARIARTAM 2. 1.2589 g of a certain brand of milk powder required 25.89 mL of 0.01873M EDTA to titrate the calcium contained in the sample. (a) What is the percent calcium in the sample? (b) Would the true result be higher, lower, or not be affected if the milk powder sample has been slightly wet?0.0585 g Na2C2O4 10 mL to adjust KMnO4 solution prepared in 0.1 M'pure water, 2 M H2SO4 added, heating process and 8.4 mL titrant as a result of titration it's spin out. Calculate the actual concentration of potassium permanganate accordingly
- A 0.1093-g sample of impure Na2CO3 was analyzed by the Volhard Method. After adding 50.00 mL of 0.06911 M AgNO3, the sample was back titrated with 0.05781 M KSCN, requiring 27.36 mL to reach the end point. Report the purity of Na2CO3sample.A 0.1036-g sample containing only BaCl2 and NaCl is dissolved in 50 mL of distilled water. Titrating with 0.07916 M AgNO3 requires 19.46 mL to reach the Fajans endpoint. Report the % (w/w) BaCl2 in the sample. [Ans. 29.86 % (w /w)]A2.880 g sample contain thiourea (NH,),CS (76.12 amol) was extracted into a dilute H,SO, solution and titrated with 35.42 mL of 0.008221 M Hg according to the following reaction 4(NH2)2CS+Hg*. [NH,)2CS],Hg Calculate the %((NH2),CS in the sample? 1 090.829 % 2 O0.005% 3. 03.079 9% 4 045 44 %