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How do you prepare ascorbic acid solution?
To prepare an ascorbic acid solution, dissolve the appropriate amount of ascorbic acid powder in distilled water. Stir the solution until the powder is completely dissolved. Ensure the solution is properly mixed and then store it in a clean container.
Why should ascorbic acid solution not to be exposed to the air?
Ascorbic acid is sensitive to air and can undergo oxidation when exposed, leading to a loss of its antioxidant properties and potential breakdown of the compound. This oxidation reaction can reduce the effectiveness of the ascorbic acid solution.
Will ascorbic acid lower the pH?
Yes, ascorbic acid (vitamin C) is an acidic compound and can lower the pH of a solution when added.
Is vitamine c an acid or base?
ascorbic acid
What is the effect of adding the sulfuric acid before KI in iodometric titration?
Adding sulfuric acid before KI in an iodometric titration helps to acidify the solution and prevent the premature oxidation of iodide ions to iodine. This ensures that the iodide ions react with the analyte (substance being tested) instead of being oxidized by any oxidizing agents present in the solution. Acidifying the solution also helps to stabilize the iodine formed during titration.
How do you prepare ascorbic acid solution?
To prepare an ascorbic acid solution, dissolve the appropriate amount of ascorbic acid powder in distilled water. Stir the solution until the powder is completely dissolved. Ensure the solution is properly mixed and then store it in a clean container.
How do you prepare ascorbic solution?
To prepare an ascorbic acid solution, first, determine the desired concentration and volume. Weigh the appropriate amount of ascorbic acid (vitamin C) using a balance, typically around 1 gram for a 100 mL solution at a concentration of 1% (w/v). Dissolve the ascorbic acid in distilled water by stirring until fully dissolved, then transfer the solution to a volumetric flask or graduated cylinder, adding water to reach the desired final volume. Store the solution in a dark container at low temperatures to minimize degradation.
Why should ascorbic acid solution not to be exposed to the air?
Ascorbic acid is sensitive to air and can undergo oxidation when exposed, leading to a loss of its antioxidant properties and potential breakdown of the compound. This oxidation reaction can reduce the effectiveness of the ascorbic acid solution.
Will ascorbic acid lower the pH?
Yes, ascorbic acid (vitamin C) is an acidic compound and can lower the pH of a solution when added.
What are the colour changes when titating the lemon juice with the iodine solution and starch?
When titrating lemon juice with iodine solution in the presence of starch, the color changes from yellow to blue-black. Initially, the iodine solution is brown, which indicates the presence of free iodine. As the titration progresses and all the available ascorbic acid in the lemon juice reacts with the iodine, excess iodine will react with the starch, resulting in the blue-black color. This color change signifies the endpoint of the titration.
What is another name for vitamin C?
Ascorbic Acid is the chemical name for Vitamin C.
Is vitamine c an acid or base?
ascorbic acid
What is the effect of adding the sulfuric acid before KI in iodometric titration?
Adding sulfuric acid before KI in an iodometric titration helps to acidify the solution and prevent the premature oxidation of iodide ions to iodine. This ensures that the iodide ions react with the analyte (substance being tested) instead of being oxidized by any oxidizing agents present in the solution. Acidifying the solution also helps to stabilize the iodine formed during titration.
What is the acid value of iodine solution?
The acid value of iodine solution represents the amount of free iodine present in the solution, which is a measure of its ability to oxidize or react with other substances. It is typically expressed in terms of grams of iodine per 100 milliliters of solution.
What is the scientific name for ascorbic acid?
The scientific name for ascorbic acid is L-ascorbic acid.
How does iodine react with acid?
Iodine does not directly react with acids. However, when iodine is added to an acid solution, it can form hypoiodous acid (HOI) which is a weak acid. This reaction can be used in analytical chemistry to detect the presence of iodine.
How could determine the concentration of ascorbic acid in an unknown sample?
The concentration of ascorbic acid in an unknown sample can be obtain by conducting a few steps by using the DCPIP test. Firstly, we must obtain the volume (dm ) of the sample solution which are required to turn the DCPIP solution (blue) colour into colourless. After obtaining the volume we use an electronic balance to obtain the mass of the sample solution in gram (g). Then we use the concentration formula of [mass (g) of solute per volume (dm ) of solution] to find out the concentration. Hence. The concentration obtained was the concentration of ascorbic acid.
