Q: 1: The distribution constant for iodine between an organic solvent and HO is 85. Find the concentration of I, remaining in the aqueous layer after extraction of 50.0mL of 1.00 X 103 M I2 with the following quantities of the organic solvent: (a) 50.0 mL; (b) two 25.0 mL portions; (c) five 10.0 mL portions.
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- Five drops of dichlorofluorescein have been added to a solution containing 0.800 g sample which required 25.30 mL of 0.100 M AgNO3. (c) Calculate the weight percent NaCl in the original sample.3.A sample is known to contain NaOH, Na2CO3 NaHCO3 or compatible mixture of these together with inert matter. With methyl orange, a 1.100 g sample requires 31.40 mL of HCl ( 1.00 mL is equivalent to 0.0140g CaO). With phenolphthalein indicator, the same weight of sample requires 13.30mL of the acid. What is the percent composition of the sample? ww ww3. To 20,00 ml of 0,1250 mol/l solution of silver nitrate – 25,00 ml of 0,1000 mol/l solution of potassium thiocyanate were added. Calculate pAg of this mixture. pKs(AgSCN) = 11,97 Express numerical result with an accuracy of: Х,ХX
- 10-27. A 10.231-g sample of window cleaner containing ammonia was diluted with 39.466 g of water. Then 4.373 g of solution were titrated with 14.22 mL of 0.106 3 M HCl to reach a bromocresol green end point. (a) What fraction of the 10.231-g sample of window cleaner is contained in the 4.373 g that were analyzed? (b) How many grams of NH3 (FM 17.031) were in the 4.373-g sample? (c) Find the weight percent of NH3 in the cleaner.Consider the following unbalanced redox reaction. Cr₂O² (aq) + Cu(s) → Cr³+ (aq) + Cu²+ (aq) Part A Balance the equation a Cr₂0 (aq) +8H (aq) + Cu(s) +6C+ (aq)+cH₂O(l) + Cu²+ (aq) Give your answer as an ordered set of numbers a. 8. y. Use the least possible integers for the coefficients. ΑΘΕ ΑΣΦΑ a. B. 7.6.c.k → ?Directions: Solve the problem with a complete step-by-step solution. A 100.0-mL sample of brackish water was made ammoniacal, and the sulfide it contained was titrated with 16.47 mL of 0.02310 M AgNO3. The analytical reaction is 2Ag+ + S2- ---> Ag2S (s)Calculate the concentration of H2S in the water in parts per million, cppm.
- Q: 1: The distribution constant for iodine between an organic solvent and H;O is 85. Find the concentration of I; remaining in the aqueous layer after extraction of 50.0ml. of 1.00 x 103 M I; with the following quantities of the organic solvent: (a) 50.0 ml.; (b) two 25.0 ml. portions; (c) five 10.0 ml. portions. Q: 2: An acidic solute, HA, has an acid dissociation constant of 1.00 x10, and a partition coefficient between water and benzene of 3.00. Calculate the extraction efficiency when 50.00 mL of a 0.025 M aqueous solution of HA buffered to a pH of 3.00, is extracted with 50.00 mL of benzene. Repeat for cases in which the pH of the aqucous solution is buffered to 5.00 and 7.00.Q: 1: The distribution constant for iodine between an organic solvent and H,0 is 85. Find the concentration of I; remaining in the aqueous layer after extraction of 50.0ml. of 1.00 x 10 M I with the following quantities of the organic solvent: (a) 50.0 ml.; (b) two 25.0 ml. portions; (c) five 10.0 ml. portions. Q: 2: An acidic solute, HA, has an acid dissociation constant of 1.00 x10, and a partition coefficient between water and benzene of 3.00. Calculate the extraction efficiency when 50.00 ml. of a 0.025 M aqueous solution of HA buffered to a pH of 3.00, is extracted with 50.00 mL of benzene. Repeat for cases in which the pH of the aqueous solution is buffered to 5.00 and 7.00.UEid- base tit ration the Consentrat ion of ammonia Solution excess HCL was titrated ith o.07om Na, cO3 Solutian. The volume of Na, Coz Solution reguired was 15.50 ml using the following eguations: 2HCLem> + Na, COgcaps CO2 Cays + HzO1) t NaCL Calculate the concentration (molarity and ppm) of ammonia in the Original Solution.(MM of NHzis 17.031.9/4) 10.0 was by of o.10OMI HCE to Then
- 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.FSC 8 1921. Brightspace A Aktiv Chemistry C D Z < Q + # At F2 @ 2 What volume in mL of 0.3000 M NaCl solution is required to produce 0.2700 moles of NaCl? W S app.101edu.co Walmart - Hiring Ce... X F3 X # 3 11. Unit 12: Late Adulthood - Develo X E JC 4 D F4 с 144 $ JU F5 R LL F ► 11 % 5 V F6 t 44 T G A 6 F7 Simulation play - Labster B Y H F8 & 7 8 U N Question 7 of 9 DELL F9 X D * 8 J F10 ( M Walmart - Hiring Center 9 F11 JI K 2 O ) O F12 L P 4 : 7 +/- PrtScr W 8 Insert { ( **5. From the following data calculate the normalities of the acid and base solutions: weight of pure Na,CO3 = 0.2448 g; volume of acid = 43.65 mL ; volume of base used in back titration = 0.84 mL ; 1.000 mL of base = 0.982 mL of acid. Reaction: CO, + 2H* → H2CO3