CHM 111 Lecture Notes - Lecture 11: Ionic Compound, Electrolyte, Molar Concentration

• School: University of Miami
• Department: Chemistry
• Course: CHM 111
• Professor: Falcao Vanessa

Document Summary

Coefficients in a chemical reactions specify relative amount of moles of each substance involved. Mole - to - mole conversions -- making molecules. Stoichiometric ratio: 2 moles c8h18 : 16 moles co2. 22 moles c8h18 (16 mol co2 2 mol c8h18 ) = 176 mol co2. Solutions are mixtures, so the composition can vary from one sample to another. Most commonly, it is a solid (least amount - solute) in a liquid (most amount - solvent) Saltwater sample from different seas or lakes have different amounts of salt. To describe solutions accurately, you need to describe how much of each component is present. Dilute solutions have small amounts of solute compare to solvent -- more particles. Concentrated solutions have large amounts of solute compared to solvent -- less particles. A common way to express solution concentration is molarity (m). Volume is the volume of solute and solvent.