the iodine moved into the beaker the cornstarch moved into the plastic bag iodine has a smaller molecular size than cornstarch cornstarch has a smaller molecular size than the iodine the plastic bag was selectively permeable
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A cellophane bag containing a solution of iodine is placed in a beaker containing a starch solution and incubated for one hour. (inside the cellophane is iodine- in the beaker is starch) Select all of the following statements that are true after 1hr of incubation. - The iodine concentration inside the beaker would not change - The Starch concentration inside the beaker would not change - There would be a colour change inside the beaker - The iodine concentration inside the beaker would decrease - The iodine concentration inside the beaker would increase
Madhur L.
'A sample of solid iodine placed in tube and the tube sealed after all of the air removed. The mass of the tube and the solid iodine together Is 27.0 grams: The tube then heated until all of the iodine undergoes sublimation_'
Maitreya E.
Jodine Solid iodine that is left at room temperature subli- mates from a solid to a gas. But when heated quickly, a different process takes place, as described here. "About 1 g of iodine crystals is placed in a sealed glass ampoule and gently heated on a hot plate. A layer of purple gas is formed at the bottom, and the iodine liquefies. If one tilts the tube, this liquid flows along the wall as a narrow stream and solidifies very quickly". $$\begin{array}{l}{\text { Why is it necessary to use a sealed ampoule in this }} \\ {\text { investigation? }}\end{array}$$
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