When orange iodine is exposed to starch it turns blue-black. in an experiment, you placed a cornstarch solution in a small plastic bag. next, you placed the the bag in a beaker of water containing 10 drops of iodine. if the solution in the plastic bag turned blue-black (check all that apply)?

The plastic bag was permeable to iodine.

The iodine moved into the plastic bag.

The plastic bag was selectively permeable.

Explanation:

Hello,

In this case, the available options are:

The plastic bag was permeable to cornstarch.

The plastic bag was permeable to iodine.

The iodine moved into the plastic bag.

The cornstarch moved into the beaker.

The plastic bag was selectively permeable.

Now, this a case in which the osmosis process is carried out, it is understood as "the spontaneous net movement of solvent molecules through a selectively permeable membrane into a region of higher solute concentration, in the direction that tends to equalize the solute concentrations on the two sides". In such a way, we verify that among the options, the following apply:

The plastic bag was permeable to iodine as it allowed its movement.

The iodine moved into the plastic bag as the solution in the plastic bag turned blue-black.

The plastic bag was selectively permeable as it allowed the movement of iodine.

Best regards.

clouds form

solid ice forms on leaves.

water droplets form on grass.

alkaline metals are lithium, sodium, rubidium, potassium, cesium and francium.

alkali metals have electronegativity from 0.7 to 1, lowest in periodic table of elements, which means that alkali metals (i group in periodic table) has positive oxidation number in compounds.

electronegativity is a chemical property that describes the tendency of an atom to attract a shared pair of electrons towards itself.

alkaline metals (far left in main group) have lowest ionizations energy and easy remove valence electrons,

for example, potassium is the alkali metal and has a single valence electron in the outer electron shell.

electron configuration of potassium is: ₁₉k 1s²2s²2p⁶3s²3p⁶4s¹.

they can not exist alone in nature, because they are very reactive.