Question

If 20 grams of 4 different solutes were added to a certain amount of solvent, how would it be different than .2 moles of each?

Answer 1

In other words, why are a solutes measured in moles rather than grams

Answer 2

The mole is a unit of measurement used in chemistry to express amounts of a chemical substance. Using moles instead of mass or volume is a much more convenient way to express the amount of substance in a reactant or product. Think of it this way. You can measure your body weight in ounces but that can be a fairly large number so we either use pounds or kilograms to keep the numbers low and much more simplified. Therefore, 20 grams of 4 different solutes is still 20 grams of each. That means the only thing different about them are their physical and chemical properties but in the end they're equal in terms of the amount present because they're 20 grams each. The same applies to the # of mols present. If the # of mols are the same then the amount of solute present is the same. The only thing different what the solute is and its own respective chemical and physical properties. Think of it like you have a banana and an apple. 20 grams of apples vs 20 grams of bananas. They're both 20 grams regardless of how you look at it. While you could have more apples or bananas in those 20 grams, what you are looking at is the mass and they're 20 grams a piece. Same thing applies to mols as well.

Answer 3

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Answer 4

Thanks that helped. So the results wouldn't change?