What are the structural differences between starch and cellulose that explain their different interactions with iodine?

A State the colour change in iodine if a food contains starch. 3 Pour ... solution for the presence of starch, sugar, and protein. (6 marks). Topic 8.4 ... For each sample, a small piece is crushed with water and heated to boil in a test tube. After cooling, iodine solution is added and any color change is recorded ... No color change (Iodine Solution remains brown) Iodine/Potassium Iodide solution changed from brown to blue- black. Interpretation. Starch is not present Iodine solution can be used to test plant leaf tissue for the presence of starch. A scientific prediction is a testable statement about a possible outcome, ... Detects free Iodine, Chlorine, and Peroxides in a solution; One pocket sized vial of 100 Strips; Lower levels react with the strip at 5 to 10 ppm. No color ... Lugol's iodine: a solution of potassium iodide that turns blue in the presence of starch. ... the beaker contents would turn blue in color and the dialysis bag ... Dec 16, 2022 ... Indeed, I2 has been shown to efficiently bind to amylose in a dry/solid state, but much less so in solution (unless special conditions, e.g., ... testing for starch using iodine solution. Iodine is a chemical that is commonly used to identify the presence of starch in a substance. 2. Performing the ... ... colour upon addition of 10% ferric chloride solution. PURITY TESTS ... iodine with 0.1 N sodium thiosulfate adding starch TS as the endpoint is approached. Apr 3, 2025 ... In aqueous solution even minute amounts of iodine in the presence of starch produce a blue-black color.