CHEM-C 101 Lecture Notes - Lecture 30: Electronegativity, Molar Concentration
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Document Summary
Solutions: are homogenous mixture of two or more substances, solvent, material present in largest amount, solute, all other materials present, types of solutions, gas/gas, liquid/solid, liquid/liquid, solid/solid. If the change of energy in a solution is greater than 0, then the substance will probably not dissolve. If the change of energy in a solution is less than 0, then the substance will dissolve. Entropy: a measure of energy randomization or energy dispersal in a system, less random arrangements are said to have lower entropy, more random arrangements are said to have higher entropy. Solubility: amount of solute that can be dissolved per amount of solvent, affected by, temperature. Identity of solute molecule: pressure (in gases, solubility increases with decreasing temperature, solubility increases with higher pressures. Molarity: number of moles solute per liter of solution, can be used as a conversion factor between moles and volume in liters, molarity=(cid:2923)(cid:2925)(cid:2922)(cid:2915)(cid:2929) (cid:2925)(cid:2916) (cid:2929)(cid:2925)(cid:2922)(cid:2931)(cid:2930)(cid:2915)
