Introduction to Molarity

Slides:

Advertisements

Similar presentations

SOLUTIONS Concentration Measurement: Molarity

Advertisements

Molarity 2. Molarity (M) this is the most common expression of concentration M = molarity = moles of solute = mol liters of solution L Units are.

Laboratory Solutions. Solute The substance that is being dissolved NaCl.

Molarity and Molality.

Chemistry 11 Introduction to Molarity Lesson 1. Prescription drugs in the correct concentration make you better. In higher concentration they can kill.

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.

II III I II. Concentration Solutions. A. Concentration  The amount of solute in a solution.  Describing Concentration % by mass - medicated creams %

Laboratory Solutions In the laboratory, we will be using different concentration of chemical solutions. Each protocol will require different solutions.

Unit 11: Acids, Bases, and Solutions Molarity. After today you will be able to… Define molarity in terms of its mathematical formula Calculate moles,

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

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.

Concentration Concentration is the amount of solute dissolved in an amount of solution. Molar concentration is called Molarity, or M. M = moles.

Chemistry 11 Introduction to Molarity Lesson 1. Chemists need to make solutions that have precise concentrations.

Molarity & Solutions. Prescription drugs in the correct concentration make you better. In higher concentration they can kill you.

Introduction to Molarity

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.

C. Johannesson Concentration Ch. 12- Solutions. Concentration A measure of the amount of solute dissolved in a certain amount of solvent. Concentrated.

% 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  -

Solution Composition & Concentration Mass Percent & Molarity!

II III I II. Concentration Solutions. A. Concentration  The amount of solute in a solution.  Describing Concentration % by mass - medicated creams %

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

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

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.

Solutions Molarity = concentration term used to describe an amount of solute dissolved in a given amount of solvent. Concentrated solution = contains large.

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.

Concentration Calculations Molarity. Objectives To calculate the molecular weight and moles of a substance To calculate the Molarity of a substance using.

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.

CONCENTRATION AND DILUTIONS. Concentrations of Solutions ■a dilute solution contains only a small amount of solute ■concentrated solution contains a large.

Two methods for Preparation of a desired volume of a Molar Solution  1) Preparation from a solid solute.  2) Preparation by Dilution of a Concentrated.

Unit: Acids, Bases, and Solutions

Introduction to Molarity

Introduction to Molarity

S-C-9-3_Concentrations Presentation

Solutions & Chemical Equilibrium

Unit 13: Solutions & Equilibrium

Solutions Review What is the molarity of a solution made by dissolving 0.35 mol in 145 milliliters of solution?

Section 2 - Concentrations of Solutions

Solutions Concentration.

Solutions II. Concentration.

Do Now: Define the term concentration as it relates to a solute in a solution. C. Johannesson.

Unit 13: Solutions & Equilibrium

Section 2: Concentration

Molarity & Dilution.

Molarity and Dilution Solution Chemistry.

Solution Concentration

Molarity (cont.).

Concentration of Solute

A dilute solution is one that contains a small amount of solute.

Molarity Chemistry.

Chapter 12.3 concentration –

Which one of these is more concentrated?

Introduction to Molarity

Diluting Solutions Lesson 6.

Introduction to Molarity

Introduction to Molarity

Introduction to Molarity

Solution Concentration

Introduction to Molarity

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

Today: Quiz next time we meet! HW – Read pages

A ______________ solution contains a ____________ amount of solute.

Table of Contents Chapter 15: Solutions.

Presentation transcript:

Introduction to Molarity

Prescription drugs in the correct concentration make you better. In higher concentration they can kill you.

Chemists need to make solutions that have precise concentrations

Pesticides must be in proper concentrations. Food additives must be in correct concentrations. A driver is legally impaired at 0.08 mg/mL blood alcohol content. Chemists control the concentration of chemicals using the concepts we will develop in this unit.

The concentration of a solution tells you how much solute that is dissolved in a given amount of solvent (water). The molarity is the concentration of a solution. Molarity = Moles Liter 1. 2.255 moles of NaCl is dissolved in 4.0 L of water, calculate the molarity. Molarity =

The concentration of a solution tells you how much solute that is dissolved in a given amount of solute (water). The molarity is the concentration of a solution. Molarity = Moles Liter 1. 2.255 moles of NaCl is dissolved in 4.0 L of water, calculate the molarity. Molarity = 2.255 moles 4.0 L

The concentration of a solution tells you how much solute that is dissolved in a given amount of solute (water). The molarity is the concentration of a solution. Molarity = Moles Liter 1. 2.255 moles of NaCl is dissolved in 4.0 L of water, calculate the molarity. Molarity = 2.255 moles 4.0 L = 0.56 moles/liter = 0.56 M (Molar) where M means moles per 1 liter

2. 5. 00 g KOH is dissolved in 250. mL of water, calculate the 2. 5.00 g KOH is dissolved in 250. mL of water, calculate the molarity. Molarity =

2. 5. 00 g KOH is dissolved in 250. mL of water, calculate the 2. 5.00 g KOH is dissolved in 250. mL of water, calculate the molarity. Molarity = 5.00 g

2. 5. 00 g KOH is dissolved in 250. mL of water, calculate the 2. 5.00 g KOH is dissolved in 250. mL of water, calculate the molarity. Molarity = 5.00 g x 1 mole 56.11 g

2. 5. 00 g KOH is dissolved in 250. mL of water, calculate the 2. 5.00 g KOH is dissolved in 250. mL of water, calculate the molarity. Molarity = 5.00 g x 1 mole 56.11 g 0.250 L

2. 5. 00 g KOH is dissolved in 250. mL of water, calculate the 2. 5.00 g KOH is dissolved in 250. mL of water, calculate the molarity. Molarity = 5.00 g x 1 mole 56.11 g --------------------------- 0.250 L = 0.356 M

3. How many moles are there in 205. mL of a 0.172 M solution?

3. How many moles are there in 205. mL of a 0.172 M solution?

3. How many moles are there in 205. mL of a 0.172 M solution? 0.205 L x 0.172 moles 1 L

3. How many moles are there in 205. mL of a 0.172 M solution? 0.205 L x 0.172 moles = 0.0353 moles 1 L

4. How many grams NaCl are there in 250.0 mL of 0.500 M solution?

4. How many grams NaCl are there in 250.0 mL of 0.500 M solution?

4. How many grams NaCl are there in 250.0 mL of 0.500 M solution? 0.250 L x 0.500 moles 1 L

4. How many grams NaCl are there in 250.0 mL of 0.500 M solution? 0.250 L x 0.500 moles x 58.5 g 1 L 1 mole

4. How many grams NaCl are there in 250.0 mL of 0.500 M solution? 0.250 L x 0.500 moles x 58.5 g = 7.31 g 1 L 1 mole

5. How many grams of NaCl must be used to prepare a 100. 0 mL. of 0 5. How many grams of NaCl must be used to prepare a 100.0 mL of 0.250 M solution.

5. How many grams of NaCl must be used to prepare a 100. 0 mL. of 0 5. How many grams of NaCl must be used to prepare a 100.0 mL of 0.250 M solution. 0.1000 L

5. How many grams of NaCl must be used to prepare a 100. 0 mL. of 0 5. How many grams of NaCl must be used to prepare a 100.0 mL of 0.250 M solution. 0.1000 L x 0.250 moles 1 L

5. How many grams of NaCl must be used to prepare a 100. 0 mL. of 0 5. How many grams of NaCl must be used to prepare a 100.0 mL of 0.250 M solution. 0.1000 L x 0.250 moles x 58.5 g 1 L 1 mole

5. How many grams of NaCl must be used to prepare a 100. 0 mL. of 0 5. How many grams of NaCl must be used to prepare a 100.0 mL of 0.250 M solution. 0.1000 L x 0.250 moles x 58.5 g = 1.46 g 1 L 1 mole

6. How many milliliters of a 0. 200 M solution of CoCl2 will 6. How many milliliters of a 0.200 M solution of CoCl2 will contain 25.0 g?

6. How many millilitres of a 0. 200 M solution of CoCl2 will 6. How many millilitres of a 0.200 M solution of CoCl2 will contain 25.0 g? 25.0 g

6. How many millilitres of a 0. 200 M solution of CoCl2 will 6. How many millilitres of a 0.200 M solution of CoCl2 will contain 25.0 g? 25.0 g x 1 mole 129.9 g

6. How many milliliters of a 0. 200 M solution of CoCl2 will 6. How many milliliters of a 0.200 M solution of CoCl2 will contain 25.0 g? 25.0 g x 1 mole x 1 L 129.9 g 0.200 mol

6. How many milliliters of a 0. 200 M solution of CoCl2 will 6. How many milliliters of a 0.200 M solution of CoCl2 will contain 25.0 g? 25.0 g x 1 mole x 1 L x 1000 mL 129.9 g 0.200 mol 1 L

6. How many milliliters of a 0. 200 M solution of CoCl2 will 6. How many milliliters of a 0.200 M solution of CoCl2 will contain 25.0 g? 25.0 g x 1 mole x 1 L x 1000 mL = 962 mL 129.9 g 0.200 mol 1 L

7. Describe how you would prepare 100. 0 mL of a 0. 200 M 7. Describe how you would prepare 100.0 mL of a 0.200 M solution of CoCl2. 0.1000 L x 0.200 moles x 129.9 g = 2.60 g 1 L 1 mole Weigh 2.60 g of CoCl2 Dissolve in water Transfer to a 100 mL volumetric flask and fill to the line