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Why indicator blank is used in mohr method?
An indicator blank is used in the Mohr method to account for any color changes that may occur due to impurities in the indicator itself. By measuring the blank, you can subtract this error from the titration result, ensuring accurate determination of the analyte concentration.
What is the difference between volhard and mohr methods?
The Volhard method is a titration method used to determine the concentration of halide ions in a solution using silver nitrate and potassium chromate as indicators. The Mohr method, on the other hand, is also a titration method used to determine the chloride ions concentration in a solution using silver nitrate and potassium chromate indicators. The key difference lies in the end point detection: Volhard method involves the use of a ferric alum indicator that forms a red-brown precipitate, while the Mohr method involves the formation of a red-brown silver chromate precipitate.
How do you determine percentage purity of a salt by Mohr method?
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What is n factor of mohr's salt in solid state?
The n factor of Mohr's salt in solid state is 2. This is because each formula unit of Mohr's salt contains two moles of electrons that can be lost in a redox reaction.
Why we add conc sulphuric acid in mohr salt in the titration of mohr salt against potassium dichromate?
For preparation of standard solution of Mohr salt {FeSO4.(NH4)2SO4.6H2O}, it's necessary to add dilute H2SO4 to prevent the Fe2+ ions of Mohr salt solution from undergoing oxidation (to Fe3+).
What are the limits for determination of chloride by the Mohr method?
The Mohr method for determining chloride ions has a detection limit of around 10-20 ppm and a quantitative limit of around 30-40 ppm. These limits can vary depending on the specific conditions and equipment used in the analysis.
Why we used mohr method in neutralization solution?
The Mohr method is used in neutralization solutions to determine the concentration of chloride ions or substances that can be precipitated as silver chloride. By titrating the solution with a standardized silver nitrate solution using a chromate indicator, the endpoint is reached when all chloride ions have reacted to form a white precipitate. This method allows for accurate determination of chloride concentration in solution.
How can you test the percent purity of potassium chlorate?
To test the percent purity of potassium chlorate, you can perform a titration with a known concentration of a reducing agent, such as iron(II) sulfate, and determine the amount of reducing agent needed to completely react with the potassium chlorate. From the titration results, you can calculate the purity of the potassium chlorate by comparing the actual amount of potassium chlorate in the sample to the theoretical amount that should be present based on the reaction stoichiometry.
Why mohr method is better than volhard method?
The Mohr method is typically preferred over the Volhard method for chloride titrations because it does not require a silver nitrate standard solution, making it more cost-effective and simpler to execute. Additionally, the Mohr method is more precise as it allows for a direct endpoint determination based on the formation of a specific silver chloride precipitate.
Why in Mohrs method of titration pH is maintain as neutral?
In Mohr's method of titration, the pH is maintained as neutral in order to ensure that the indicator used in the titration changes color sharply at the equivalence point. This helps in accurately determining the end point of the titration, as the color change will be clearly visible when the reaction is complete. Maintaining a neutral pH also prevents any interference from acidic or basic impurities that could affect the accuracy of the titration.
Why the brown colour appear and disappear at mohr method?
because the japs attacked pearl harbor and the dropping of the atomic bomb caused radiation poisoning, therefore causing the brown color, not colour to appear and disappear at mohr method, whatever that is.
What is a mohr method?
The Mohr method is a chemical technique used to determine the chloride ion concentration in a solution by titrating it with a silver nitrate solution. The endpoint is detected by the formation of a white precipitate of silver chloride. This method is commonly used in analytical chemistry to quantify the amount of chloride in a sample.
Can chloride and bromide simultaneously determine by Mohr method?
I want to assmue the the readers of this answer have know the details theory and calculations about Mohr method if not u can refer to Any analytical text for reference. Well, Bromide and Chloride can not be determine simultaneously in a sample using Mohr method , the reason be that the indicator use for each of them is different. and there will be problem in the procedure if ones try to determine both simultaneously. To determine Chloride Ion, Ammonium or Potassium Thiocynate is used as indicator and the sample must be neutral or slightly acidic. while Eosin indicator is use for the determination of Bromide Ion and the same neutral solution is prefer for this purpose, the solution must be adjusted to neutral either by adding small amount of Nitric acid or by adding small amount of carbonate as the case maybe. But, in the determination of each of them Silver Nitrate is use for the titration of both and this is the similarity they shared and the experimental procedure is quite the same. Olajire Mojeed
How do you determine percentage purity of a salt by Mohr method?
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Why is it that mohr's method of titration for the determination of halide must be performed in neutral?
Performing Mohr's method of titration for the determination of halide ions in a neutral solution is important because it ensures that the chromate indicator used in the titration does not react with any acidic or basic substances present, which could interfere with the accuracy of the results. Keeping the solution neutral helps to maintain the stability and sensitivity of the indicator, allowing for a more reliable determination of the halide concentration.
Why Mohr's salt is considered a primary standard?
Mohr's salt (ammonium iron(II) sulfate) is considered a primary standard because it is a highly pure and stable compound that can be easily weighed and dissolved to make a standard solution. It has a high molar mass and is stable in air, making it suitable for accurate titrations.
What is the birth name of Hal Mohr?
Hal Mohr's birth name is Harold Leon Mohr.
