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Reagents Needed:
diphenyl carbazide
conc. HCl
ethanol
Method:
1. Dissolve 0.5g of diphenyl carbazide in 5mL of conc HCl.
2. Prepare a solution of 50%(v/v) ethanol by mixing 50mL 95%(v/v) ethanol and water.
3. Transfer the diphenyl carbazide solution in HCl to the 50% ethanol and mix.
Dissolve diphenylcarbazide in acetone to prepare a solution for determining chromium. Add a few drops of sulfuric acid to the solution to enhance sensitivity. Mix the solution with the sample containing chromium and observe for the development of a pink color, indicating the presence of chromium.
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How do you prepare 1 mM dpph radical solution?
To prepare a 1 mM DPPH radical solution, dissolve 3.94 mg of DPPH (2,2-diphenyl-1-picrylhydrazyl) in 1 liter of solvent (typically methanol or ethanol). This will result in a concentration of 1 mM (molecular weight of DPPH is approximately 394.3 g/mol).
How do you prepare0.1m dpph solUTION?
To prepare a 0.1M DPPH (2,2-diphenyl-1-picrylhydrazyl) solution, you would weigh 3.83 grams of DPPH powder and dissolve it in 1 liter of solvent (typically ethanol or methanol). Make sure to wear appropriate personal protective equipment and handle the chemical in a well-ventilated area.
How chromic acid is prepared from potassium dichromate and sulphuric acid?
Chromic acid can be prepared by mixing potassium dichromate with concentrated sulfuric acid. The reaction produces a solution of chromic acid which can then be used in various applications, such as cleaning and passivation of metals. Additionally, proper safety measures should be followed when working with chromic acid due to its hazardous nature.
Serum chromium?
Serum chromium refers to the amount of chromium present in the blood. Chromium is an essential mineral that plays a role in glucose metabolism. Monitoring serum chromium levels may be important for individuals with diabetes or those at risk for deficiencies.
How can prepare .01N KBr solution?
To prepare a 0.01N KBr solution, dissolve 0.74g of KBr in 1 liter of water. This will give you a solution with a molarity of 0.01N for KBr.
What mass of calcium bromide is needed to prepare 250 ml of a 2.50M?
The answer is 124,93 g (for the anhydrous CaBr2).
How do you prepare 1 mM dpph radical solution?
To prepare a 1 mM DPPH radical solution, dissolve 3.94 mg of DPPH (2,2-diphenyl-1-picrylhydrazyl) in 1 liter of solvent (typically methanol or ethanol). This will result in a concentration of 1 mM (molecular weight of DPPH is approximately 394.3 g/mol).
Can you stop doing drugs without a twelve step program?
Of course you can. The twelve step program is just a format that some people THINK they need in order to quit. All you need is willpower, determination, expectation of the worse. Know your withdrawal symptoms, take time off if necessary, prepare. Prepare, prepare, prepare. You certainly don't need a twelve-step program, though.
How do you prepare chromic acid reagent?
Chromic acid reagent is prepared by dissolving chromium trioxide in water. It should be handled with caution as it is a strong oxidizing agent and can be corrosive. It is commonly used in laboratory settings for oxidation reactions.
How did Roosevelt's background prepare him for the difficulties of the Depression years?
His early struggles with polio taught him determination to win over high obstacles. His political experience gave him insight into national problems. His character and love for America were advantages.
What is the future tense of prepare?
The simple future tense of prepare is 'will prepare'.
Why do we prepare cost sheet?
How do i prepare costsheet How do i prepare costsheet
How do you prepare0.1m dpph solUTION?
To prepare a 0.1M DPPH (2,2-diphenyl-1-picrylhydrazyl) solution, you would weigh 3.83 grams of DPPH powder and dissolve it in 1 liter of solvent (typically ethanol or methanol). Make sure to wear appropriate personal protective equipment and handle the chemical in a well-ventilated area.
How do you use word prepare?
Will you prepare dinner? Is he going to prepare for the exam?
How can you use prepare in a sentence?
I must prepare for the test by studying. You must prepare for the race. You must prepare for your presentation. I must prepare for the beginning of the school year by getting supplies.
What is the base word for preparations?
prepare
Who to prepare Trout?
Him who is hungry prepare trout.
