Standardization of a Solution A 50.00 mL aliquot portion of 0.01020 M KIO3 solution was transferred into a conical flask. After adding 2.0 g KI and 2 mL of 6M HCl, the mixture was titrated with 31.32 mL of the Na2S2O3 solution to the starch end point. Calculate the number of mmoles of IO3-. mmoles 103- How many mmoles of 12 was released after the addition of KI? mmoles I: How many mmoles Na2S2O3 reacted with the Iz produced? mmoles Na2S₂O3- What is the molarity of the Na2S2O3 solution? M Na2S2O3 Write the half reaction representing the transformation of OC1- (hypochlorite ion) to Cl-(chloride) in acidic medium. Reduction Half Reaction: Write the half reaction representing the transformation of 1- (iodide ion) to I2 (iodine) in acidic medium. Reduction Half Reaction: Analysis of Household Bleaching Agent The composition of a commercially available household bleaching agent is advertised as 5% (w/v) NaOC1. Calculate the number of mmoles of NaOCI present in 50 mL of the bleaching agent. mmol . Calculate the number of mmoles of Na2S2O3 that will react with the 12 that is generated from the reactions of the KI with the NaOCI present in 50-mL of the bleaching agent. mmol Na2S₂O3 How many mL of 0.1025 M Na2S2O3 are required to deliver this amount? mL

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The pNa of a mbxture prepared by mixing 200 ml of 0.00063 Mof NaCl and 300 ml of 0.00040 M in NazPO4 is: 2.10 O 1.50 O 4.84 O 3.34 O 3.01 ge Next page

A 0.3172 g sample containing only KCl (MM: 74.55)and NaBr (MM: 102.89) is dissolved in 50 mL water and titrated with 0.1120 M AgNO3, requiring 36.14 mL to reach the endpoint. What is the % NaBr in the sample?Note: Send to me your solution for perfect points with proper name and label.  a. 17.40% b. None of the given choices c. 78.39% d. 15.22% e. 82.41%

Solute, A, has a distribution ratio between water and ether of 7.5 A 50 ml aqueous solution of 1M of compound A was extracted with two consecutive extraction of 25ml ether( 25 x2); calculate the percent of A remaining in the aqueous phase Select one: 21.1 % 1.6 % 4.4 % 11.7 % 1.38 %

1)A bottle of concentrated aqueous sulfuric acid, labeled 95.00 wt% H2SO4, has a concentration of 16.5 M. Calculate the density of 95.00 wt% H2SO4.  2)Ascorbic acid in 5 vitamin C tablets was measured by a titration against (100 ± 0.002 M) NaOH solution. It required 10.00 ± 0.05 mL NaOH solution to reach the equivalent point. What is the average quantity of ascorbic acid per vitamin tablet?

To 47.62 ml of wine were added 5 mL of concentrated KI solution and 32.11 mL of solution containing (0.7557 g KIO 3)/(100.00 mL solution). The wine+reagent mixture was acidified with 10 ml of 1 M HCI to create a known number of moles of I 2 by the reaction 10 3 + excessl + some H*-> 31 2 Some of this I 2 immediately reacted with the sulfite in the wine sample by the reaction SO 3 +12 --> products we don't care about The left over I 2 was titrated to a starch end point with 10.14 mL of 0.04521 M thiosulfate solution, by the reaction 12+ 25 20 32-> products we don't care about What is the concentration of sulfite in the wine, expressed in mM?

16:19 An ore is analyseod for the manganese content by converting the manganese to Mng04 and woighing it a 152 g sample yelds Mng04 woighing 0.126 g, what would be the percent Mngog in the sample? 3 Mng03 a 2Mng04 + % 02 3 mol Mng03 =2 mol Mng04 OA858 % OR5.97 % OC4 95 % O0.4 20 % OE 33.32 % Add a caption... > Status (Custom) +

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2. What is the molarity of a stock solution that is 1.8g/ml and 44% HCI? CORRECT SIGNIFICANT FIGURES 3. How would we make 1.00L of the solutions below from a stock solution of H₂PO4 with an assay of 66.0% and a density of 1.64: 1.00M, 1.00N, 3.00M, 3.00N CORRECT SIGNIFICANT FIGURES