8. NacIO, is the active ingredient in household bleach. The concentration of thehypochlorite ion. CIO', can be determined in two stages.In stage 1: An acidified iodide solution is added to a solution of the bleach and iodineis formed.CIO (aq) + 2 l (aq) + 2 H*I2 (aq) + Cr" (aq) + H20 1)In stage 2: The iodine formed is titrated with sodium thiosulphate solution2 S203 2 (aq) +l2 (aq)21 (aq) +S4O6 ² (aq)10 ml of household bleach was diluted to 250 mL in a flask. 25 ml of this solution wasadded to excess acidified potassium iodide solution. The solution was then titrated with 0.10 Msodium thiosulphate using an appropriate indicator. The volume of thiosulphate solutionrequired to reach the end point of the titration was 20.50 cm³.(a) Calculate the number of moles of iodine which reacted in the titration.(b) Calculate the concentration of the CIO in the original household bleach.

This is an iodometric reaction because here iodine is titrated which is already produced in the…

Answered: (a) Calculate the number of moles of…

(a) Calculate the number of moles of iodine which reacted in the titration. (b) Calculate the concentration of the CIO in the original household bleach.

Chemistry

10th Edition

ISBN:9781305957404

Author:Steven S. Zumdahl, Susan A. Zumdahl, Donald J. DeCoste

Publisher:Steven S. Zumdahl, Susan A. Zumdahl, Donald J. DeCoste

Chapter1: Chemical Foundations

Section: Chapter Questions

Problem 1RQ: Define and explain the differences between the following terms. a. law and theory b. theory and...

See similar textbooks

Related questions

Q: Calculate the change in pH that results from adding 0.160 M NaNO3 to 1.00 L of 0.160 HNO3 (aq).

Q: If 0.045 g of KHP is used for titration, calculate the molarity (concentration) of the wood ash…

A: Given-> Weight of KHP = 0.045 gram Initial volume = 5.75 ml Final volume = 23.45 ml

Q: Laura and Sebastian create an aqueous solution of Ba(OH)2 by pipetting 25.00 mL of 0.0970 M Ba(NO3)2…

A: The chemical equation may be written as: a. Given data is: Concentration of Barium nitrate = 0.0970…

Q: The average daily dose recommended by hematologists for drugs is no more than 200 mg in terms of…

A: The average daily dose of elemental iron in the term of moles is determined as follows.…

Q: Suppose the Kc value for Cobalt (II) hexahydrate is 6.80 and suppose upon heating the solution…

A: The equilibrium constant can be written as the ratio of concentration of products to the…

Q: Concentration of Zn(II) in seawater

A: Concentration is the abundance of a constituent divided by the total volume of a mixture. In the…

Q: A sample of steel was dissolved and the manganese present was converted to MnO4– (aq). Water was…

Q: Consider the solid Na2CO3 dissolving in water. (a) Write the balanced dissociation equation with…

A: Na2CO3 is an ionic compound made of Na+ and CO32- . Hence when Na2CO3 dissolves in polar protic…

Q: A 1.00 L phosphate buffer solution that contains 0.1270 moles of dihydrogen phosphate (H2PO4) and…

Q: 2-chlorobenzoic acid (C 6 H 4 ClCOOH) is produced by diazotization. 6.25 g of anthranilic acid…

A: A question based on introduction to chemistry. A set of conditions for the synthesis process is…

Q: The hardness of water (hardness count) is usually expressed in parts per million (by mass) of…

A: The hardness of water is usually expressed in parts per million of CaCO3 . The hardness count of…

Q: A chemist is given a piece of limestone and told that 50.00% of the sample exists as calcium oxide…

A: EDTA forms 1:1 complex with Ca+2.The balanced equation is Ca+2 + EDTA–4 ------->…

Q: A sample of steel was dissolved and the manganese present was converted to MnO4– (aq). Water was…

A: Given, Absorbance = 0.560 Path length = 1 cm Molar absorptivity = 3.62*103 L/(mol cm) Concentration…

Q: Describe the changes in pH that take place during the titration of: (a) a weak acid with a strong…

Q: We dissolve 3.54 g of an unknown acid, HA, in enough water to produce 25.0 mL of solution. We…

A: Any acid's strength always gets estimated by its dissociation constant which is symbolized as "Ka".…

Q: You have a solution that contains acetic acid, (CH3COOH or HAc). The concentration of acetic acid in…

Q: Calculate the solubility of Ca(OH)2(s) (Ksp = 1.6 x 10–15) in an aqueous solution buffered to pH…

A: Since the pH = 8 = 14 + log[OH-] where [OH-] = concentration of OH- ions => [OH-] = 10-6 M Since…

Q: Mass of KxFe(C2O4)y · zH2O : 5.60 g Mass of sample : 0.155 g Mass of FeCl3 used in preparation :…

A: Dissociation of the given complex is shown.

Q: Mass of KxFe(C2O4)y · zH2O : 4.70 g Mass of sample : 0.175 g Mass of FeCl3 used in preparation :…

A: Mass of KxFe(C2O4)y · zH2O : 4.70 g Mass of sample : 0.175 g Mass of FeCl3 used in preparation :…

Q: a three step process is required in order to determine the concentration of NO3- in a basic…

A: A) Balanced equations for each process:1) Zinc metal reduces Nitrate ions into ammonia in basic…

Q: Determine the pH at the equivalence (stoichiometric) point in the titration of 47.52 mL of 0.165 M…

A: An acid by giving its H+ ions converts to a conjugate base whereas a base by accepting H+ ions…

Q: Calculate the pH at the stoich iometric po int of the titration of 25.00 cm3 of 0.150 M lactic acid…

Q: Write the balanced net ionic equation for the precipitation of silver (I) carbonate from aqueous…

A: The net ionic equation for the precipitation of silver (I) carbonate from aqueous solutions: It can…

Q: explain the importance of iodometric titration methods for the determination of iodine content in…

A: Iodometric titration method is used for the determination of iodine content in salt.

Q: A sample of steel was dissolved and the manganese present was converted to MnO4– (aq). Water was…

Q: (8) What sort of reaction is shown below? OH (a) Acid-Base (b) Elimination (c) Addition OH (d)…

A: Since, If carboxylic acid react with primary alcol in presence of sulphuric acid then formation of…

Q: The cumulative formation constants for the reaction of Co21 with ammonia are log b1 5 1.99, log b2 5…

A: Concentrated ammonia reacts with cobalt (II) ion forming a metal complex. The reaction takes place…

Q: b To make NaTcO4, the metal is dissolved in nitric acid 7 HNO3 (aq) + Tc(s) → HTCO4(aq) + 7 NO2(g) +…

A: The question is based on the concept of chemical reactions. we have to write chemical equation for…

Q: The first stage in corrosion of iron upon exposure to air is oxidation to Fe2+. (a) Write a balanced…

A: Corrosion is a galvanic process by which metals deteriorate through oxidation, usually but not…

Q: A sample of impure tin of mass 0.530 gg is dissolved in strong acid to give a solution of Sn2+Sn2+.…

A: Answer: To solve this question we have to convert the moles of NO3- into moles of tin by using…

Q: Consider the series of reactions to synthesize the alum (KAl(SO4 )2 · xH2O(s)) from the…

A: To calculate the moles of alum formed from the given number of moles of each reagent, we would use…

Q: (a) Write the dispersed phase and dispersion medium of milk.(b) Write one similarity between…

A: We’ll answer the first question since the exact one wasn’tspecified. Please submit a new question…

Q: Can ultraviolet light (over a wavelength range from 200 to 400 nm) be applied to operate the…

A: Hydrogen fuel cells are a type of electrochemical device that generates electricity through a…

Q: What is the solubility of Agl in: a) water? b) an aqueous solution of 0.45 M NH3?

A: 'Like dissolves like' is the thumb rule for dissolution of solute in solvent. This means ionic…

Q: What is the molar concentration of a 4% solution of borax? (sodium tetraborate decahydrate,…

A: The molar concentration of a 4% solution of borax is to be calculated. (sodium tetraborate…

Q: What volume of groundwater containing 2 mg l−1 dissolved oxygen (DO) would be required to oxidize 23…

A: This is a problem based on oxidation of octane. Here using the concentration of O2 we can find the…

Q: [3] Write chemical equations describing the dissolution of the following compounds in water a)…

A: A question based on solubility. For the two given substances the equations of dissolution are to be…

Q: 6. (a) Aspirin is a weak acid with a pKa of 3.6 and MW 180 g/mol. The saturation solubility (S) of…

A: The objective of the question is to calculate the solubility of the unionised form of aspirin at a…

Q: A 2mL solution of hyrogen peroxide (1 g / mL) is titrated with permanganate in basic conditions.…

Q: What is the pH of a 0.32 M solution of a weak acid, HCNO if Ka for HCNO is 2.0 x 10-4? (SHOW…

A: a) Given that, Molarity of HCNO solution = 0.32 M Ka value of HCNO acid = 2.0×10-4 HCNO is a weak…

Q: The titration of 86.9 mL of an unknown concentration H3PO4 solution requires 94.6 mL of 0.086 M KOH…

A: Volume of H3PO4 = 86.9 ml ...Or because 1L = 1000 ml ...so, = 86.9 ml × (1L / 1000 ml ) =…

Q: The hydrogen sulfide in a 40.0-g sample of crude petroleum was removed by distillation and collected…

A: Mass of CdSO4 = 0.079 g Mass of sample = 40.0 g

Q: A 50.0 mL solution of Ca(OH)₂ with an unknown concentration was titrated with 0.340 M HNO₃. To reach…

A: The reaction of HNO3 and Ca(OH)2 is, In the given reaction moles ratio between HNO3 and Ca(OH)2 is…

Question

8. NacIO, is the active ingredient in household bleach. The concentration of the
hypochlorite ion. CIO', can be determined in two stages.
In stage 1: An acidified iodide solution is added to a solution of the bleach and iodine
is formed.
CIO (aq) + 2 l (aq) + 2 H*
I2 (aq) + Cr" (aq) + H20 1)
In stage 2: The iodine formed is titrated with sodium thiosulphate solution
2 S203 2 (aq) +l2 (aq)
21 (aq) +S4O6 ² (aq)
10 ml of household bleach was diluted to 250 mL in a flask. 25 ml of this solution was
added to excess acidified potassium iodide solution. The solution was then titrated with 0.10 M
sodium thiosulphate using an appropriate indicator. The volume of thiosulphate solution
required to reach the end point of the titration was 20.50 cm³.
(a) Calculate the number of moles of iodine which reacted in the titration.
(b) Calculate the concentration of the CIO in the original household bleach.

Expert Solution

This question has been solved!

Explore an expertly crafted, step-by-step solution for a thorough understanding of key concepts.

SEE SOLUTION Check out a sample Q&A here

Introduction

VIEW

Calculation

VIEW

Conclusion

VIEW

Step by step

Solved in 3 steps with 3 images

SEE SOLUTION Check out a sample Q&A here

Knowledge Booster

Learn more about

Need a deep-dive on the concept behind this application? Look no further. Learn more about this topic, chemistry and related others by exploring similar questions and additional content below.

Similar questions

This compound is used in the preliminary treatment of municipal water supply. (A) Al2(SO4)3 (B) Na2CO3 (C) NaOCl (D) Ca(OCl)2
Ca(OH)2(aq)+2HCl(aq)CaCl2(aq)+H2O(l)An aqueous solution of Ca(OH)2with a concentration of 0.209 M was used to titrate 25.00 mL of aqueous HCl. 15.93 mL of the Ca(OH)2was required to reach the endpoint of the titration. A. How many moles of base were required to react completely with the acid in this reaction? _____mol Ca(OH)2 B. How many moles of HCl were present in the original 25.00 mL of acid?______mol HCl
A 20.0 mL sample of commercial bleach was diluted with water to a 250.0 mL volumetric flask. A 50.0 mL aliquot of the diluted sample was treated with excess KI and starch. The liberated iodine was titrated with 0.399 M Na2S2O3, requiring 13.9 mL to reach the end point. (a) Identify the type of redox titration method used. (b) Identify the indicator and endpoint color. (c) Calculate the % w/v NaOCl in the sample.
The following chemical reaction takes place in aqueous solution: 2AgF(aq)+Na2CO3(aq)→Ag2CO3(s)+2NaF(aq) Write the net ionic equation for this reaction.
Explain what happened to the salt (the inorganic impurity) during the extraction process. Where does it go and why?
A sample of steel was dissolved and the manganese present was converted to MnO4– (aq). Water was then added to give a final solution volume of 100.00 mL. A sample of this solution was examined and was found to have an absorbance at 525 nm of 0.560 (pathlength = exactly 1 cm). What is the concentration of MnO4– in the solution? (The molar absorptivity is 3.62 × 103 L/(mol cm).)
PLEASE I NEED TO UNDERSTAND HOW TO SOLVE THIS. A 1.000-gram sample of NaOH (39.997 g/mol) which has been exposed to the air for some time (NaOH will adsorb water and CO2 from the ambient air) is dissolved in water and then diluted to 500.00 mL, 100.0 mL of this solution required 38.60 mL of 0.01062 M HCl to be titrated to a methyl orange endpoint (~pH 3). A second 100.00 mL portion is treated with excess BaCl2 and then diluted to 250 mL and filtered. 200 mL of the filtrate required 29.62 mL of HCl to titrate to phenolphthalein (~pH 8-9) endpoint. Calculate in the original sample:a.) the percentage of NaOHb.) the percentage of Na2CO3 (105.9898 g/mol)Make sure you use at least four significant figures for this calculation. Note that the adsorbed CO2 is converted to Na2CO3. The Ksp for BaCO3 (s) is 2.58 x 10-9 (extremely insoluble).
Given: You weigh out exactly 0.200 g of Fe(NH4)2(SO4)2·6H2O and dissolve it in the 100.00 mL volumetric flask. You then pipette 2.00 mL of this solution into the 50.00 mL volumetric flask to prepare the stock standard tris-bipyridyl-iron(II) solution. a. Calculate the molar concentration of iron(II) in this solution in the 50.00 mL volumetric flask. (The MW of Fe(NH4)2(SO4)2·6H2O is 392.14 g/mol) (answer a given the information above)
Which of these acts as a buffer in embalming fluids? sodium lauryl sulfate EDTA lanolin calcium
Given that Ksp for AgCl is 1.6E-10 and Kf for Ag(CN)2- is 5.6E8, calculate the concentration of Ag+ when 0.15 M AgNO3 is reacted with 0.25 M KCN.
CALCULATE the molarity of NaI in a solution obtained by adding 5 mL of 0.2M NaI to a mixture of 5 mL of 0.2M of K2SO4, 5 mL of K2S2O8, 4mL of H2O and 1 mL of starch.
The hydrogen sulfide in a 75.0-g sample of crude petroleum was removed by distillation and uncollected in a solution of CdCl2. The precipitated CdS was then filtered, washed, and ignited to CdSO4. Calculate the percentage of H₂S in the sample if 0.115 g of CdSO4 was recovered.