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Well, honey, the Mohr method is suitable for use in neutral solutions only because it relies on a chromate indicator that changes color at a specific pH range. If the solution is too acidic or basic, the indicator won't work its magic properly. So, if you want accurate results, stick to neutral solutions with this method.
What else can I help you with?
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?
Stop being a buttpirate and ask a real question... buttpirate!
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?
1- done only in neutral medium. 2- all the cations which give insolublld be chromate must be absent or removed before titration. 3-titration of Ag+ with Cl- is not feasible. 4- not suitable for I- and SCN-
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.
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.
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
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.
Why is it impossible to determine iodide ion by Mohr method?
I may be off, but it has something to do with thermodynamics. The silver reacts well with chlorine and bromide, but when it comes to iodide, i would guess that the dG is too low leaving the iodide in solution. Also, if you look at the solubility of silver iodide, it is VERY high in water which doesn't give you the chance to create the precipitate needed for use in the Mohr method. Silver Chloride - white precipitate Silver Bromide - ? precipitate. Silver Chromate - red good luck.
What is a mohr method?
Mohr method is a Precipitation titrations method which is the concentration of an unknown substance in solution is determined by adding measured amount of a standard solution such as AgNO3 that react with unknown samples to determine CL, Br in Solid and solutions samples . NaCL + AgNO3 =====> AgCL + NaNO3. Br- + Ag NO3=====> AgBr + NO3- Then the concentration of the unkown can be calculated using the stoichiometry of the recation and the number of moles of standard solution needed to reach the End point. The mohr method uses chromate CrO4 2- ion as an indicator . By Known the stoichiometry and moles consumed at end point,we can determine the mount of chloride in an unknown samples. Saeed Yousef AL-Soumali
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?
Stop being a buttpirate and ask a real question... buttpirate!
Why is it that mohr's method of titration for the determination of halide must be performed in neutral?
When pH is lower than 7, chromic ion gets protonated and chromic acid is predominant in the solution. Consequently, if the pH is above 7, chromate ion concentration is too low to form precipitate with silver ions at the end point. If the pH is above 10, brownish silver hydroxide is formed masking the end point. hence a neutral medium must be maintained
