CHEM 1030 Midterm: Term Test 3 - Fall 2017

• School: Auburn University
• Department: Chemistry
• Course: CHEM 1030
• Professor: Ria Yngard

Document Summary

Homogeneous mixtures of two or more substances. The solute is uniformly dispersed throughout the solvent. Concentration: the amount of solute dissolved in a given quantity of solvent or solution. Mass-to-mass ratios: mg solute / kg solvent. Mass-to-volume ratios: mg solute / l solution. Parts per million (ppm): 1mg/l = 1mg/kg = 10-3g/103g = 1g/106g = 1 ppm (assuming density at 20 c is 1. 00 kg/l) Molarity: moles solute per liter of solution. Mc*vc=md*vd i. e. the number of moles before dilution are equal to the number of moles after the dilution. Electrolyte: substance that dissolves in water to yield a solution that conducts electricity (nacl). Nonelectrolyte: a molecular substance that does not dissociates into ions when it dissolves in water (ethanol). Example: chemical reaction in which a precipitate forms. Acids substance that ionizes in water to produce h+ ions (arrhenius definition). Proton (h+ ) donors (br nsted lowry definition) Bases substance that dissociates in water to produce ohions (arrhenius definition).