Solution Concentrations

Slides:

Advertisements

Similar presentations

Concentration.  Distinguish between dilute and concentrated.  Calculate molarity.  Describe how to prepare solutions of given concentrations.  Calculate.

Advertisements

1 Chapter 10 Acids and Bases 10.10Dilutions. 2 Dilution Diluting a solution Is the addition of water. Decreases concentration. ConcentratedDilutedSolution.

STANDARD GRADE CHEMISTRY CALCULATIONS Calculations involving the mole. 1 mole of a solid substance is the formula mass of the substance in grams. This.

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

Molarity and Dilutions

Solution Concentration Concentration – how much solute dissolved in amount of solvent Concentration – how much solute dissolved in amount of solvent what.

Unit 4 Solubility Dilutions MOLARITY Concentration

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

Molarity and Molality.

Examples-Molarity and Dilutions. Example What is the molarity of a solution that contains 4.5 moles of sucrose in L of water?

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.

Solution Concentration Notes

Molality Section 15.2.

Solution Concentration Section 14.2 Concentration - amount of solute dissolved in a specific amount of solvent concentrated - a lot of solute dilute.

Preparing a Molar Solution

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.

Molarity ICS III Week 7.

C.6-C.7 In which you will learn about: Different concentration units

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.

Molarity = Molarity ( M ) moles solute liters of solution

Notes 15.2 Describing Solution Composition. Mass Percent Mass percent= mass of solute X 100 mass of solution = grams of solute X 100 grams of solute +

Solutions Concentrations of Solutions. Solutions  Objectives  Given the mass of solute and volume of solvent, calculate the concentration of solution.

a measure of the amount of solute that is dissolved in a given quantity of solvent unit of measurement is Molarity (M) which is moles/liter can be dilute.

Concentration Units: Terms like “dilute” and “concentrated” are not specific. Percent by Mass: Mass % = mass of solute x 100 Total mass of solution Recall:

Section 15.2 Describing Solution Composition 1. To understand mass percent and how to calculate it Objective.

Chemistry: An Introduction to General, Organic, and Biological Chemistry, Eleventh Edition Copyright © 2012 by Pearson Education, Inc. Chapter 7 Solutions.

MOLARITY A measurement of the concentration of a solution. Molarity (M) is equal to the moles of solute (n) per liter of solution M =__n__ = mol volL.

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

CONCENTRATION OF SOLUTIONS. Solute + The amount of solution can be expressed by: - mass m (g, kg) or - volume V (cm 3, mL, dm 3, L, m 3 ) m = V x  -

Ch Concentration of a Solution The concentration of a solution is a measure of the amount of solute in a given amount of solvent or solution. Chemists.

Preview Objectives Concentration Molarity Molality Chapter 12 Section 3 Concentration of Solutions.

Solution Composition & Concentration Mass Percent & Molarity!

Molarity  Unit of Concentration  There are many units of concentration  Molarity is most useful to the chemist M = moles of solute Liters of solution.

Concentration Molarity. Nature of Solutions  Because solutions are mixtures, the composition can vary among samples  Consider barely sweet tea versus.

Solution Concentration

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

Molar Mass & Molarity. Molar Mass Mass in grams of one mole of an element or compound. Numerically equal to the atomic weight of the element or the sum.

Question 1 What is the volume (in mL) of 18.0 M H 2 SO 4 is needed to contain 2.45g H 2 SO 4 ?

Molarity • Molarity is a measure of molar concentration

Concentration The concentration of a solution is a measure of the amount of solute in a given amount of solvent or solution. Concentration is a ratio:

Chemists describe solutions in terms of concentration. We define the concentration of a solution as the amount of solute in a given volume of solution.

Moles and Solutions - Concentrations

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

02 – CONCENTRATION - MOLARITY CHEMISTRY 30 – UNIT 2 – SOLUBILITY – CH. 16 IN TEXT.

Molarity Molarity is defined as the amount of moles of a compound dissolved in an amount of solvent (usually water). It can be solved with the equation:

1. How can we work out the formula mass of a chemical? 2.What is a mole? 3.What is the formula mass of Mg(NO 3 ) 2 4.Calculate the number of moles of 5.6g.

Molarity Chapter 15.2.

S-C-9-3_Concentrations Presentation

Solution Concentration

Molar Concentration 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.

Molarity (M): State the ratio between the number of moles of solute & the volume of solution (in liters). Molarity (M) =

mass of solute + solvent

Solutions: Concentrations

Molarity & Dilution.

Solution Concentration

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 Solutions

Which one of these is more concentrated?

Units of Concentration

Unit A: Chemistry Topic: Calculating Concentrations

Solution Concentration

Molarity REview.

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

Aim: How do you express concentration of a solution

Concentration of Solutions :

Molarity (M): State the ratio between the number of moles of solute & the volume of solution (in liters). Molarity (M) =

Presentation transcript:

Solution Concentrations http://www.sciencegeek.net/Chemistry/taters/Unit6SolutionConcentration.htm Solution Concentrations Answer the following questions. Use the formula n =cV. Check your answers by using the web site shown above. All the following questions are found on this site What is the concentration of a solution in grams/Litre when 80 grams of sodium chloride, NaCl, is dissolved in 2 litres of solution? A solution of sodium hydroxide, NaOH, contains 12 grams of solute in 4 liters of solution. What is the concentration of the solution in grams/Liter? Please note litres (Aus) = liters(US)

Molarity describes the concentration of a solution in moles of solute divided by liters of solution. Masses of solute must first be converted to moles using the molar mass of the solute. This is the most widely used unit for concentration when preparing solutions in chemistry and biology. The units of molarity, mol/L, are usually represented by a scripted capital “M”. Percent composition is the ratio parts of solute to one hundred parts of solution and is expressed as a percent. Determine the mass of solute and solution and then divide the mass of the solute by the total mass of the solution. This number is then multiplied by 100 and expressed as a percent. In dilute water solutions, we can assume that 1 mL of water-based solution has a mass of 1 gram, so 1 liter of solution has a mass of 1000 grams.

3. A solution of sugar contains 35 grams of sucrose, C12H22O11 in 100 mL of solution. What is the concentration of the solution in grams/Liter? 4. What is the concentration of a solution in grams/Liter when 17 grams of potassium chloride, KCl, is dissolved in 500 mL of solution? 5. What is the molarity (moles per liter) of a solution in which 80 grams of sodium hydroxide, NaOH, is dissolved in 1 liter of solution? 6. Calculate the molarity of a solution of potassium fluoride, KF, in which 58 grams of the compound are dissolved in 4 liters of solution. 7. What is the molarity of a solution in which 51 grams of aluminum oxide, Al2O3, is dissolved in 500 mL of solution?

How well did you do? Check your answers here 8. A solution with a volume of 0.25 liters contains 10 grams of hydrogen fluoride, HF. What is the molarity of the solution? 9. What is the percent composition of a solution in which 80 grams of sodium hydroxide, NaOH, is dissolved in 1 liter of solution? 10. A solution of sugar contains 35 grams of sucrose, C12H22O11 in 100 mL of solution. What is the percent composition of the solution? 11. What is the percent composition of a solution in which 50 grams of aluminum oxide, Al2O3, is dissolved in 500 mL of solution? 12. What is the percent composition of a solution in which 480 grams of sodium chloride, NaCl, is dissolved in 4 liters of solution. How well did you do? Check your answers here http://www.sciencegeek.net/Chemistry/taters/Unit6SolutionConcentration.htm

http://www.docbrown.info/page04/4_73calcs11msc.htm http://www.docbrown.info/page12/gifs/volumetricapparatus1.gif

WORK THROUGH THE QUESTIONS ON THE WEBSITE. THEY LOOK LIKE THIS Try the online quiz....... UK GCSE level 4 type http://www.docbrown.info/page04/4_73calcs/MSCmcTEST.htm