Mole Fraction.

Slides:

Advertisements

Similar presentations

Physical Properties of Solutions Chapter 13. 8/21/86 CO 2 Cloud Released 1700 Casualties Lake Nyos, West Africa Earthquake? Landslide? Wind/Rain?

Advertisements

Changes in Solubility I.Pressure A. Changes in pressure do not affect solubility of liquid or solid solutes in liquid solvents. 1. But, increases in pressure.

Concentration. Concentration Particles per volume Can be in grams per litre but chemists usually express concentration in moles per litre This are related.

Solution Concentration. Calculations of Solution Concentration: Mass Percent Mass percent Mass percent is the ratio of mass units of solute to mass units.

Calculating Moles and Number of Atoms

Molarity and Molality.

Dilutions and Percent Solutions

Molarity. Molarity Molarity (M) or molar concentration is a measure of the concentration of a solute in a solution. Unit for molar concentration is mol/L.

Chapt. 12 Solutions Sec. 1 Concentration. Units of Concentration I solvent + solute.

Molarity Revised 9/07/2006. Molarity the number of moles of solute dissolved in one liter of solution. The units, therefore are moles per liter, specifically.

Solution Concentration Notes

Avogadro’s number is written as conversion factors x particles and 1 mole 1 mole 6.02 x particles The number of molecules in 0.50 mole.

Aim: How can we use moles to express the concentrations of solutions? Do Now: 1.Take out a calculator and reference tables. 2.How many moles are in L.

Parts per Million The measurement used to determine the amount of a solute that has been dissolved in a solution.

DETERMING CONCENTRATIONS OF SOLUTIONS. MOLAR Molar is mol solube/1 L solution Making molar solution 1)Add ½ of the total solvent 2)Add required amount.

Solutions Molality. Molality (m) A concentration that expresses the moles of solute in 1 kg of solvent Molality (m) = moles of solute 1 kg solvent.

1 Molarity. 2 Review of Converstions Fractions that = 1 Different units and numbers that equal each other Example: 1 in. = 2.54 cm Factors: 1 in. OR 2.54.

Molarity. Calculations Using The Molarity Equation 1 st.) Calculate the molarity if you are given the components of the solution. 2 nd.) Calculate the.

Moles and Molecules. Formula Mass Sum of the average atomic masses of all the atoms represented in a formula Measured in amu What is the formula mass.

Chapter 20 Concentration. Molarity (M) Moles of solute per liter of solution. Molarity = moles of solute liters of solution.

Concentrations of Solutions. What are the components of a Solution? Solute and Solvent.

Percent by mass, mole fraction, molarity, and molality

% by Mass Another way to measure the concentration of a solution % by mass = mass solute x 100 mass solution Solution = solute + solvent.

Section 6.2—Concentration

Chapter 20 Concentration. Molarity (M) Moles of solute per liter of solution. Molarity = moles of solute liters of solution.

Jeopardy Start Final Jeopardy Question Percent Solutions MolarityDilutions Mixed Practice

Percent by Mass Describes solutions in which a solid is dissolved in liquid Percent by Mass = mass of solute/mass of solution x 100 Mass of solution is.

Solution Concentration

Solution Concentration. Concentration Describes the amount of solute dissolved in a specific amount of solvent.

Concentration Units The concentration of a solution is the amount of solute present in a given quantity of solvent or solution. Percent by Mass x 100%

MOLE CONVERSION WORKSHEET

Ch. 13/14: Solutions Describing a Solution’s Composition.

Percentage Composition

1. General Terms a. concentratedLots of solute dissolved in the solvent b. diluteLittle solute in the solvent 2. Specific terms a. Percent by mass Describes.

 Objective: › Today I will be able to:  Calculate the molarity, molality, mole fraction and dilution for a solution  Analyze the effect of changing.

Molarity What is it and how is it calculated?. Molarity What is it? A measurement of a solution’s concentration How much solute is dissolved in a solvent.

Solutions and Concentrations Notes Page 5. SOLUTIONS A homogenous mixture of two or more substances.

Concentrations Homework Show me that you’ve finished! Let’s check your answers.

Solutions Part II: Concentration Units. Percent solutions.

Concentration of Solutions What is Concentration? What is Concentration? The amount of solute dissolved in a specified amount of solution The amount of.

Determining Empirical Formula from Combustion Analysis 1.

1 Concentration Day 2: Chapter 14. CONCENTRATION The amount of solute present in a set amount of solvent or total solution. The amount of solute present.

Solution Chemistry Notes Solution Chemistry Notes.

WARM UP ACT Prep Passage V 5 minutes Start when the bell rings.

15.2 Concentration Units How to calculate the amount of solute in a solution.

Solutions. Types of Solutions Solid in liquid Liquid in Liquid Gas in Liquid Gas in Solid Liquid in Solid Solid in Solid Gas in Gas Liquid in Gas Solid.

Solution Concentration

Molar Mass HW 5-2.

What is the molar mass of calcium phosphate?

Molality (m) A concentration that expresses the

Molarity Thornburg 2014.

Solution Concentration

Aim # 18: What are some other methods of expressing the concentration of a solution? H.W. # 18 Study pp (sec ) STUDY class notes Complete.

Solution Concentration- Units of Measurement

How to calculate the amount of solute in a solution

How to calculate the amount of solute in a solution

Moles and Mass -The molar mass of a compound (aka molecular mass or molecular weight) is the sum of the atomic masses of each atom in the compound -Molar.

BELLWORK 4/5/2018.

Moles to Grams Calculations

Molar Mass HW 5-2.

Molar Conversions Review

Molarity & Dilution.

Concentration -concentration can be thought of in terms of “how much stuff is in other stuff” -concentration is measured in several different ways: grams.

Concentration of Solute

Chapter 12.3 concentration –

Which one of these is more concentrated?

BELLWORK 4/6/2017.

Molarity Calculate the concentration of a solute in terms of grams per liter, molarity, and percent composition.

Concentration of Solutions :

Combustion analysis Combustion analysis is a method used in both organic chemistry and analytical chemistry to determine the elemental composition (more.

Presentation transcript:

Mole Fraction

Mole Fraction (X) is the number of moles of that component divided by the total number of moles of solute and solvent. X = Moles of component Total moles of solution

Mole Fraction (X) XSolute = Moles of solute Total moles of solution XSolvent = Moles of solvent Where: Xsolute + XSolvent = 1

1. An industrial gas contains 64. 0g of SO2 in every 750. 0g of CO2 1. An industrial gas contains 64.0g of SO2 in every 750.0g of CO2. What is the mole fraction of SO2? Given: Mass of Solute – 64.0 g Mass of Solvent – 750.0 g Formula: X = Moles of component Total moles of solution Answer: Moles solute = Mass of Solute Molar Mass of Solute = 64.0 g 32+ (16)2g/mole = 1 mole Answer: Moles solvent = Mass of Solvent Molar Mass of Solvent = 750.0 g 12+ (16)2g/mole = 17.05 mole

Given: Moles of Solute – 1 mole Moles of Solvent – 17 Given: Moles of Solute – 1 mole Moles of Solvent – 17.05 moles Formula: Mole Fraction = Moles of component Total moles of solution Answer: XSO2 = Moles of SO2 Total moles of Solution = 1 mole 1 + 17.05 mole = 0.05540

2. 100 mole of NaCl is dissolved into 100. 0 grams of pure H2O 2. 0.100 mole of NaCl is dissolved into 100.0 grams of pure H2O. What is the mole fraction of NaCl? Given: Mole of Solute – 0.100 mole Mass of Solvent – 100.0 g Formula: X = Moles of component Total moles of solution Answer: Moles solvent = Mass of Solvent Molar Mass of Solvent = 100.0 g 2 + 16 g/mole = 5.56 mole Answer: XNaCl = Moles of NaCl Total moles of Solution = 0.100 mole 5.56 + 0.100 mole = 0.018

SEATWORK 1. A 12.60 g isopropyl alcohol (C3H7OH) is dissolved in a 80 g of water. Calculate mole fraction of isopropyl alcohol in the solution.

Given: Mass of Solute – 12. 60 g Mass of Solvent – 80 Given: Mass of Solute – 12.60 g Mass of Solvent – 80.0 g Formula: X = Moles of component Total moles of solution Answer: Moles solute = Mass of Solute Molar Mass of Solute = 12.60 g (12)3 + (1)8 + 16 g/mole = 0.21 mole Answer: Moles solvent = Mass of Solvent Molar Mass of Solvent = 80.0 g 2 + 16 g/mole = 4.44 mole

Given: Moles of Solute – 0. 21 mole Moles of Solvent – 4 Given: Moles of Solute – 0.21 mole Moles of Solvent – 4.44 moles Formula: X = Moles of component Total moles of solution Answer: XSolute = Moles of C3H7OH Total moles of Solution = 0.21 mole 0.21 + 4.44 mole = 0.045