PPT-Molarity and

Colligative Properties Chemistry GT 5815 Drill Use the table from pg 9 to give the amount of substances that will dissolve in 100 g of H 2 O NH 3 at 10C and 80C Why does solubility of NH. n V C = concentration (moles/L= molarity) V = volume of solution in L 1. In 10.0 mL of a certain solution, there are 0.050 g of KF. Find the molarity of the solution (moles/L) 0.050 g KF(mole/ 2. Chapter 7.3. Objectives. Explain the meaning of solubility and compare the solubility of various substances.. Describe dilute, concentrated, saturated, unsaturated, and super-saturated solutions.. Relate changes in temperature and pressure to changes in solubility of solid and gaseous solutes.. Units of Concentration . Molality (. m. ) . aka “. molal. concentration”. . Solvent= does not include solute. Molarity (. M. ) . aka “molar concentration”. Most common concentration unit in Chemistry. Mechanisms. C483 Spring 2013. Questions. 1. . Replacement of the amino acid ________ at or near an active site of an enzyme is more likely to change enzyme activity than the replacement of ________ at or near the active site.. Ch. . 10– . The Mole. Molarity. Concentration of a solution.. total combined volume. substance being dissolved. Molarity. 2. M HCl. What does this mean?. Molarity. . Calculations. molar mass. (. g/mol. How do we indicate how much of the electrolytes are in the drink?. Concentrated versus Dilute. solute. solvent. Lower concentration. Not as many solute (what’s being dissolved) particles. Higher concentration. a pH value tells us how much H. +. is in a solution. It can be defined by: pH = - log[H. +. ] (log is to base 10). . . (Also note, square brackets are used to denote concentration values); For example: pH = -log[10. Molarity and Dilution. CONCENTRATION. Concentration. - a . measure of the . amount . of solute that is dissolved in a given . amount . of solvent. . QUALITATIVE: . (tells about . the . quality, . not a #). Ex. 1. What is the molarity of a solution that was prepared by dissolving 11.5g of solid sodium hydroxide in 1.50L of water?. Ex. 2. Calculate the molarity of a solution prepared by dissolving 1.56g of gaseous HCl in enough water to make 26.8 mL of solution.. Standard Deviation. Standard Deviation – measure . how spread out the data is from the mean. Lower standard deviation:. Data is . closer to the mean. Greater likelihood that the independent variable is causing the changes in the dependent variable. Water as a . Polar Solvent. Water is a polar molecule. since it has uneven electron distribution . and a bent molecular shape.. Due to its polar nature, water interacts strongly with its solutes and often plays an active role in aqueous reactions.. Solutions are classified as mixtures.. The a. mounts of substances mixed (solute and solvent) can vary in different solutions.. Concentration. is a way of communicating how much solute is dissolved into a given amount of solution.. M. ). number . of . moles of solute . (n) per . liter (L). of . solution. Molarity (. M. ) = . Moles of Solute. . Liters of Solution. Note: Moles = . Mass of Solute. Molar Mass of Solute. N. 2. (g) + . 3H. 2. . (g) –> 2NH. 3. (g). If a flask contains the mixture of reactants represented to the right, which image below best represents the mixture in the flask after the reactants have reacted completely?.