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Why did only some substances (sulfate and chloride) move from the bag to the beaker and...

Why did only some substances (sulfate and chloride) move from the bag to the beaker and not others (protein and starch)?
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Answer #1

Some substances (sulfate and chloride) move from the bag to the beaker and not others (protein and starch) because some molecules were too big.

Sulfate and chloride were small molecules that can pass through the selectively permeable membrane.

The protein and starch did not leave the beaker as its color was amber and the starch molecule are too large to pass through this selectively permeable membrane.

Selectively permeable membrane is that membrane that allow some molecules to pass and restrict others...

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