Less than 500 milliliters of our original solution, So our intuition would tell us is that we're going to take Pause this video and think about how you would approach that. We want 500 milliliters of this new solution. So we want to createĪ 0.125-molar solution of sodium sulfate, and Is create a solution, another aqueous solutionĭifferent concentration, in this case, one that And let's say we also haveĪs much water as we need, and what we want to do Of sodium sulfate, and it's an aqueous solution. That's quite important, known as dilutions. Video, we're gonna talk about a concept in chemistry And a small amount of salt in the water is an unconcentrated solution with a small molarity. If you have a lot of salt in the water then it is a concentrated solution which we would express with a large molarity. So if you have a glass of salt water, you have a solution of water where the water is the solvent and the salt is the solute. Together a solute and a solvent are called a solution. A solvent being a liquid into which something is dissolved into, which is referred to as the solute. Concentration being how much of a substance is in a given volume. Molarity is a unit of concentration, with units of moles of solute/ liters of solvent. So it's more convenient to use moles of atoms instead of saying 6.02214076 x 10^(23) atoms each time we do a calculation. We use such a large number in chemistry because atoms are so small that having even a small amount of atoms like a gram could already be a mole of atoms. So a dozen eggs is 12 eggs, a dozen people is 12 people, a dozen atoms is 12 atoms. In the same way that a dozen of something is 12 particles. It is defined as an Avogadro's number of particles, or 6.02214076 x 10^(23) particles. Molarity and moles are measuring different things and hence have different units.Ī mole is the unit for the amount of substance, or how much of something there is.
0 Comments
Leave a Reply. |
Details
AuthorWrite something about yourself. No need to be fancy, just an overview. ArchivesCategories |