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What is the purpose of adding NaOH to the mixture before taking the polarimeter reading?
Adding NaOH to the mixture before taking the polarimeter reading is to ensure that the compound is in its deprotonated form, which helps in obtaining accurate measurements of specific rotations. NaOH helps to neutralize any acidic impurities that could affect the optical activity of the compound, leading to more reliable results.
What effect does adding a small amount of NaOH to a buffer have on the pH?
Adding a small amount of NaOH to a buffer solution will increase the pH of the solution. This is because NaOH is a strong base that will react with the weak acid in the buffer, causing the pH to rise.
Why is NaOH added to water and not the other way?
NaOH is added to water because it is highly exothermic, meaning it releases a significant amount of heat when it dissolves. Adding NaOH to water allows for better control of the heat generated and prevents splattering or boiling of the solution. Additionally, mixing NaOH with water allows the ions to disperse more evenly, resulting in a more homogeneous solution.
How do you standardise 0.02 N NaOH?
To standardize 0.02 N NaOH, you would titrate it against a known concentration of an acid, such as a primary standard like potassium hydrogen phthalate. By carefully adding the NaOH to the acid until the endpoint is reached, you can determine the exact concentration of the NaOH solution.
How can prepare 10ppm NaOH solution?
To prepare a 10 ppm (parts per million) NaOH solution, you would need to dissolve 10 mg of NaOH in 1 liter of water. This concentration is achieved by adding a very small amount of NaOH to ensure the solution contains 10 parts of NaOH for every 1 million parts of water. Be sure to wear appropriate safety gear and handle NaOH with caution.
Why the NaOH solution is heated before adding BaCl2 in the two solutions method for determination of purity of NaOH sample?
Why the NaOH is heated before adding in BaCl2 for determination of purity of NaOH sample?
How much NaOH do you use to lower pH?
You dont - adding NaOH increases pH.
What is the purpose of adding NaOH to the mixture before taking the polarimeter reading?
Adding NaOH to the mixture before taking the polarimeter reading is to ensure that the compound is in its deprotonated form, which helps in obtaining accurate measurements of specific rotations. NaOH helps to neutralize any acidic impurities that could affect the optical activity of the compound, leading to more reliable results.
What effect does adding a small amount of NaOH to a buffer have on the pH?
Adding a small amount of NaOH to a buffer solution will increase the pH of the solution. This is because NaOH is a strong base that will react with the weak acid in the buffer, causing the pH to rise.
What happens to sodium hydroxide when heated?
At very high temperature NaOH is decomposed and Na2O fumes are emited.The reaction is:2 NaOH = Na2O = H2O
Why is NaOH added to water and not the other way?
NaOH is added to water because it is highly exothermic, meaning it releases a significant amount of heat when it dissolves. Adding NaOH to water allows for better control of the heat generated and prevents splattering or boiling of the solution. Additionally, mixing NaOH with water allows the ions to disperse more evenly, resulting in a more homogeneous solution.
Purpose of adding NaOH to the mixture before taking the polarimeter reading?
Adding NaOH to the mixture before taking the polarimeter reading helps to neutralize any acidic impurities present in the sample, which could affect the accuracy of the polarimeter reading. This step ensures that the sample solution is free from any acidic interference, allowing for a more reliable optical rotation measurement.
How do you standardise 0.02 N NaOH?
To standardize 0.02 N NaOH, you would titrate it against a known concentration of an acid, such as a primary standard like potassium hydrogen phthalate. By carefully adding the NaOH to the acid until the endpoint is reached, you can determine the exact concentration of the NaOH solution.
What is the complete ionic equation for NaOH(aq) plus HCl(aq) H2O() plus NaCl(aq)?
The chemical equation is:Na + OH- + H+ + Cl- = Na+ + Cl- + H2O(l)
How can prepare 10ppm NaOH solution?
To prepare a 10 ppm (parts per million) NaOH solution, you would need to dissolve 10 mg of NaOH in 1 liter of water. This concentration is achieved by adding a very small amount of NaOH to ensure the solution contains 10 parts of NaOH for every 1 million parts of water. Be sure to wear appropriate safety gear and handle NaOH with caution.
Why is it necessary to standardize the NaOH solution before titration?
Standardizing the NaOH solution before titration is important to accurately determine its actual concentration. This ensures the accuracy and reliability of the titration results by eliminating any discrepancies that may arise from variations in the concentration of the NaOH solution.
Why is the NaOH extract heated before acidification?
Heating the NaOH extract before acidification helps to break down any remaining organic compounds that may be present in the solution. This step promotes the complete extraction of the target compound into the aqueous phase and ensures better separation during acidification.
