0
What else can I help you with?
What is the role of concentrated H2SO4 in Hopkins-cole test?
Concentrated H2SO4 is used in the Hopkins-Cole test to dehydrate the carbohydrates present in the sample, converting them into furfural derivatives. These derivatives then react with aniline to produce a colored product, allowing for the detection of the presence of pentoses and hexoses in the sample.
Will disaccharides and polysaccharides give positive result for molisch test?
Yes they will. Disaccharides will give a positive result much quicker than polysaccharides, and it also depends on the conditions because they need to be dehydrated by an agent such as concentrated H2SO4 and it so happens that it is much easier to do so on a disaccharide than it is on the polysaccharide
What you add firstly in carbohydrate solution either H2SO4 or 1-naphthol?
1-naphthol is added first to a carbohydrate solution to detect the presence of carbohydrates. Then, sulfuric acid (H2SO4) can be added to the solution to further test for specific carbohydrates based on color changes or precipitation.
What happens when dil h2so4 is added to a small amount of sodium carbonate taken in a test tube?
When dilute sulfuric acid (H2SO4) is added to sodium carbonate (Na2CO3) in a test tube, a chemical reaction occurs where carbon dioxide gas (CO2) is produced. This gas can be observed as bubbles forming in the test tube. Additionally, sodium sulfate (Na2SO4) and water (H2O) are also formed as products of the reaction.
How to prepare nitrate test solution using diphenylamine in sulphuric acid?
To prepare a nitrate test solution using diphenylamine in sulfuric acid, you can mix diphenylamine with concentrated sulfuric acid in a specific ratio. Typically, a 0.1% diphenylamine solution in concentrated sulfuric acid is used for nitrate testing. Follow safety precautions when working with concentrated sulfuric acid as it is corrosive.
What is the role of concentrated H2SO4 in Hopkins-cole test?
Concentrated H2SO4 is used in the Hopkins-Cole test to dehydrate the carbohydrates present in the sample, converting them into furfural derivatives. These derivatives then react with aniline to produce a colored product, allowing for the detection of the presence of pentoses and hexoses in the sample.
Will disaccharides and polysaccharides give positive result for molisch test?
Yes they will. Disaccharides will give a positive result much quicker than polysaccharides, and it also depends on the conditions because they need to be dehydrated by an agent such as concentrated H2SO4 and it so happens that it is much easier to do so on a disaccharide than it is on the polysaccharide
Why did jimmy do well on the math test after drinking orange juice?
The answer is "He was concentrated"
Why do you think Judaism is not concentrated in one part of the world?
well it is either not concentrated in argentina austalia poland canada?? it was a question on a AP test
Chemical test to differentiate nitrate nitriteusing soda extract?
First prepare the soda extract/sodium extract-Take 0.5g of the salt mixture that you want to analyze for nitrate ions in a porcelain dish. To this add 1.5 g of pure(anhydrous) Na2CO3 (Sodium Carbonate) and 10 mL of distilled water.Heat the mixture. When it begins boiling, the basic radicals in the salt will get converted to the respective carbonates and dissolve. Filter the mixture and throw the residue. The filtrate is called SODA EXTRACT.Now you shall perform the Brown Ring Test for presence of nitrate ions using this soda extract.Neutralize the soda extract with DILUTE H2SO4( this neutralizing acid is used only for detecting nitrate ions.....other acids are used for different ions ) , add FeSO4 to the test tube and shake well.Carefully add CONCENTRATED H2SO4 from the side of the test tube wall. A brown ring of FeSO4No is formed at the junction of the two liquids. (Concentrated sulphuric acid will not sink down, it will be like a layer of oil above the FESO4 +dilute h2so4+soda extract mixture with the brown ring between it.)
What is a brown ring test for analysis of nitrate anion using formula?
A nitrate test is a chemical test used to determine the presence of nitrate ion in solution. A common nitrate test, known as the brown ring test[1] can be performed by adding iron(II) sulfate to the solution, then slowly adding concentrated sulfuric acid (NOT nitric acid, for obvious reasons) and watching for a brown ring on the test tube, which will indicate the presence of the nitrate ion.[2] Note that the presence of nitrite ions will interfere with this test.[3]The test follows several phases; these have been written as balanced chemical equations: 1: 2 Zn(NO3)2 + 2 H2SO4 → 2 ZnSO4 + 4 HNO3 4 FeSO4 + 2 H2SO4 → 2 Fe2(SO4)3 + H2 These two reactions happen simultaneously. 2: 4 HNO3 → 2 H2O + 3O2 + 2 NO The Nitric Acid decomposes in the intense heat produced by the high concentrate Sulphuric Acid used. 3: 2 Fe2(SO4)3 + 2 H2 + 4 NO → 4 Fe.NO.SO4 + 2 H2SO4 The Fe.NO.SO4 forms a brown ring in the middle of the solution produced by the reaction, making it easy to identify the presence of nitrates in the water.
What you add firstly in carbohydrate solution either H2SO4 or 1-naphthol?
1-naphthol is added first to a carbohydrate solution to detect the presence of carbohydrates. Then, sulfuric acid (H2SO4) can be added to the solution to further test for specific carbohydrates based on color changes or precipitation.
Can concentrated nitric acid be used in flame test instead of concentrated hydrochloric acid?
Cleaning of the test wire (platinum or nickel-chromium alloy) may by realized with nitric acid or hydrochloric acid.Rinsing is made with demineralized water.
What happens when dil h2so4 is added to a small amount of sodium carbonate taken in a test tube?
When dilute sulfuric acid (H2SO4) is added to sodium carbonate (Na2CO3) in a test tube, a chemical reaction occurs where carbon dioxide gas (CO2) is produced. This gas can be observed as bubbles forming in the test tube. Additionally, sodium sulfate (Na2SO4) and water (H2O) are also formed as products of the reaction.
You want a classic Test Case Template?
role construck repetory test
What is Salkowski's test?
Salkowsk's test is a test for cholesterol;when concentrated sulfuric acid is added to a chloroform solution of cholesterol, the chloroform layer shows a red to blue color and the acid layer shows a green fluorescence.
What supplies the body with concentrated energy?
FATS. (I just did a test on this I know its right)
