STOICHIOMETRY What is stoichiometry l Stoichiometry is the
![STOICHIOMETRY STOICHIOMETRY](https://slidetodoc.com/presentation_image/5f7e906dcb7074c2f18fb0b76e7a4cbf/image-1.jpg)
![What is stoichiometry? l. Stoichiometry is the quantitative study of reactants and products in What is stoichiometry? l. Stoichiometry is the quantitative study of reactants and products in](https://slidetodoc.com/presentation_image/5f7e906dcb7074c2f18fb0b76e7a4cbf/image-2.jpg)
![What You Should Expect l l Given : Amount of reactants Question: how much What You Should Expect l l Given : Amount of reactants Question: how much](https://slidetodoc.com/presentation_image/5f7e906dcb7074c2f18fb0b76e7a4cbf/image-3.jpg)
![What do you need? i. iii. iv. You will need to use molar ratios, What do you need? i. iii. iv. You will need to use molar ratios,](https://slidetodoc.com/presentation_image/5f7e906dcb7074c2f18fb0b76e7a4cbf/image-4.jpg)
![Steps Involved in Solving Mass-Mass Stoichiometry Problems l l Balance the chemical equation correctly Steps Involved in Solving Mass-Mass Stoichiometry Problems l l Balance the chemical equation correctly](https://slidetodoc.com/presentation_image/5f7e906dcb7074c2f18fb0b76e7a4cbf/image-5.jpg)
![Mole Ratios A mole ratio converts moles of one compound in a balanced chemical Mole Ratios A mole ratio converts moles of one compound in a balanced chemical](https://slidetodoc.com/presentation_image/5f7e906dcb7074c2f18fb0b76e7a4cbf/image-6.jpg)
![Example Reaction between magnesium and oxygen to form magnesium oxide. ( fireworks) 2 Mg(s) Example Reaction between magnesium and oxygen to form magnesium oxide. ( fireworks) 2 Mg(s)](https://slidetodoc.com/presentation_image/5f7e906dcb7074c2f18fb0b76e7a4cbf/image-7.jpg)
![Practice Problems 1) N 2 + 3 H 2 ---> 2 NH 3 Write Practice Problems 1) N 2 + 3 H 2 ---> 2 NH 3 Write](https://slidetodoc.com/presentation_image/5f7e906dcb7074c2f18fb0b76e7a4cbf/image-8.jpg)
![Mole-Mole Problems Using the practice question 2) above: Equation of reaction 2 C 4 Mole-Mole Problems Using the practice question 2) above: Equation of reaction 2 C 4](https://slidetodoc.com/presentation_image/5f7e906dcb7074c2f18fb0b76e7a4cbf/image-9.jpg)
![Mole-Mass Problems l Problem 1: 1. 50 mol of KCl. O 3 decomposes. How Mole-Mass Problems l Problem 1: 1. 50 mol of KCl. O 3 decomposes. How](https://slidetodoc.com/presentation_image/5f7e906dcb7074c2f18fb0b76e7a4cbf/image-10.jpg)
![Three steps…Get Your Correct Answer Use mole ratio l Get the answer in moles Three steps…Get Your Correct Answer Use mole ratio l Get the answer in moles](https://slidetodoc.com/presentation_image/5f7e906dcb7074c2f18fb0b76e7a4cbf/image-11.jpg)
![Let’s go! 2 KCl. O 3 2 : 1. 50 : X = 2. Let’s go! 2 KCl. O 3 2 : 1. 50 : X = 2.](https://slidetodoc.com/presentation_image/5f7e906dcb7074c2f18fb0b76e7a4cbf/image-12.jpg)
![Try This: We want to produce 2. 75 mol of KCl. How many grams Try This: We want to produce 2. 75 mol of KCl. How many grams](https://slidetodoc.com/presentation_image/5f7e906dcb7074c2f18fb0b76e7a4cbf/image-13.jpg)
![Mass-Mass Problems l l There are four steps involved in solving these problems: Make Mass-Mass Problems l l There are four steps involved in solving these problems: Make](https://slidetodoc.com/presentation_image/5f7e906dcb7074c2f18fb0b76e7a4cbf/image-14.jpg)
![Mass-Volume Problems Just follow mass problem to the penultimate level Mass-Volume Problems Just follow mass problem to the penultimate level](https://slidetodoc.com/presentation_image/5f7e906dcb7074c2f18fb0b76e7a4cbf/image-15.jpg)
![Like this: There are four steps involved in solving these problems: l Make sure Like this: There are four steps involved in solving these problems: l Make sure](https://slidetodoc.com/presentation_image/5f7e906dcb7074c2f18fb0b76e7a4cbf/image-16.jpg)
![Conversion of mole to volume No of moles = Volume Molar volume Can you Conversion of mole to volume No of moles = Volume Molar volume Can you](https://slidetodoc.com/presentation_image/5f7e906dcb7074c2f18fb0b76e7a4cbf/image-17.jpg)
![Molar volume The molar volume is the volume occupied by one mole of ideal Molar volume The molar volume is the volume occupied by one mole of ideal](https://slidetodoc.com/presentation_image/5f7e906dcb7074c2f18fb0b76e7a4cbf/image-18.jpg)
![Practice Problems Calculate the volume of carbon dioxide formed at STP in ‘dm 3' Practice Problems Calculate the volume of carbon dioxide formed at STP in ‘dm 3'](https://slidetodoc.com/presentation_image/5f7e906dcb7074c2f18fb0b76e7a4cbf/image-19.jpg)
![Practice Problems As per the equation, Mole ratio 1 : 1 problem 0. 03125 Practice Problems As per the equation, Mole ratio 1 : 1 problem 0. 03125](https://slidetodoc.com/presentation_image/5f7e906dcb7074c2f18fb0b76e7a4cbf/image-20.jpg)
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- Slides: 21
![STOICHIOMETRY STOICHIOMETRY](https://slidetodoc.com/presentation_image/5f7e906dcb7074c2f18fb0b76e7a4cbf/image-1.jpg)
STOICHIOMETRY
![What is stoichiometry l Stoichiometry is the quantitative study of reactants and products in What is stoichiometry? l. Stoichiometry is the quantitative study of reactants and products in](https://slidetodoc.com/presentation_image/5f7e906dcb7074c2f18fb0b76e7a4cbf/image-2.jpg)
What is stoichiometry? l. Stoichiometry is the quantitative study of reactants and products in a chemical reaction.
![What You Should Expect l l Given Amount of reactants Question how much What You Should Expect l l Given : Amount of reactants Question: how much](https://slidetodoc.com/presentation_image/5f7e906dcb7074c2f18fb0b76e7a4cbf/image-3.jpg)
What You Should Expect l l Given : Amount of reactants Question: how much of products can be formed. l Example l l 2 A + 2 B 3 C Given 20. 0 grams of A and sufficient B, how many grams of C can be produced?
![What do you need i iii iv You will need to use molar ratios What do you need? i. iii. iv. You will need to use molar ratios,](https://slidetodoc.com/presentation_image/5f7e906dcb7074c2f18fb0b76e7a4cbf/image-4.jpg)
What do you need? i. iii. iv. You will need to use molar ratios, molar masses, balancing and interpreting equations, and conversions between grams and moles. Note: This type of problem is often called "mass-mass. "
![Steps Involved in Solving MassMass Stoichiometry Problems l l Balance the chemical equation correctly Steps Involved in Solving Mass-Mass Stoichiometry Problems l l Balance the chemical equation correctly](https://slidetodoc.com/presentation_image/5f7e906dcb7074c2f18fb0b76e7a4cbf/image-5.jpg)
Steps Involved in Solving Mass-Mass Stoichiometry Problems l l Balance the chemical equation correctly Using the molar mass of the given substance, convert the mass given to moles. Construct a molar proportion (two molar ratios set equal to each other) Using the molar mass of the unknown substance, convert the moles just calculated to mass.
![Mole Ratios A mole ratio converts moles of one compound in a balanced chemical Mole Ratios A mole ratio converts moles of one compound in a balanced chemical](https://slidetodoc.com/presentation_image/5f7e906dcb7074c2f18fb0b76e7a4cbf/image-6.jpg)
Mole Ratios A mole ratio converts moles of one compound in a balanced chemical equation into moles of another compound.
![Example Reaction between magnesium and oxygen to form magnesium oxide fireworks 2 Mgs Example Reaction between magnesium and oxygen to form magnesium oxide. ( fireworks) 2 Mg(s)](https://slidetodoc.com/presentation_image/5f7e906dcb7074c2f18fb0b76e7a4cbf/image-7.jpg)
Example Reaction between magnesium and oxygen to form magnesium oxide. ( fireworks) 2 Mg(s) + O 2(g) Mole Ratios: 2 : 1 2 Mg. O(s) : 2
![Practice Problems 1 N 2 3 H 2 2 NH 3 Write Practice Problems 1) N 2 + 3 H 2 ---> 2 NH 3 Write](https://slidetodoc.com/presentation_image/5f7e906dcb7074c2f18fb0b76e7a4cbf/image-8.jpg)
Practice Problems 1) N 2 + 3 H 2 ---> 2 NH 3 Write the mole ratios for N 2 to H 2 and NH 3 to H 2. 2) A can of butane lighter fluid contains 1. 20 moles of butane (C 4 H 10). Calculate the number of moles of carbon dioxide given off when this butane is burned.
![MoleMole Problems Using the practice question 2 above Equation of reaction 2 C 4 Mole-Mole Problems Using the practice question 2) above: Equation of reaction 2 C 4](https://slidetodoc.com/presentation_image/5f7e906dcb7074c2f18fb0b76e7a4cbf/image-9.jpg)
Mole-Mole Problems Using the practice question 2) above: Equation of reaction 2 C 4 H 10 + 13 O 2 8 CO 2 + 10 H 2 O Mole ratio C 4 H 10 CO 2 1 : 4 [ bases] 1. 2 : X [ problem] By cross-multiplication, X = 4. 8 mols of CO 2 given off
![MoleMass Problems l Problem 1 1 50 mol of KCl O 3 decomposes How Mole-Mass Problems l Problem 1: 1. 50 mol of KCl. O 3 decomposes. How](https://slidetodoc.com/presentation_image/5f7e906dcb7074c2f18fb0b76e7a4cbf/image-10.jpg)
Mole-Mass Problems l Problem 1: 1. 50 mol of KCl. O 3 decomposes. How many grams of O 2 will be produced? [k = 39, Cl = 35. 5, O = 16] 2 KCl. O 3 2 KCl + 3 O 2
![Three stepsGet Your Correct Answer Use mole ratio l Get the answer in moles Three steps…Get Your Correct Answer Use mole ratio l Get the answer in moles](https://slidetodoc.com/presentation_image/5f7e906dcb7074c2f18fb0b76e7a4cbf/image-11.jpg)
Three steps…Get Your Correct Answer Use mole ratio l Get the answer in moles and then l Convert to Mass. [Simple Arithmetic] l Hello! If you are given a mass in the problem, you will need to convert this to moles first. Ok?
![Lets go 2 KCl O 3 2 1 50 X 2 Let’s go! 2 KCl. O 3 2 : 1. 50 : X = 2.](https://slidetodoc.com/presentation_image/5f7e906dcb7074c2f18fb0b76e7a4cbf/image-12.jpg)
Let’s go! 2 KCl. O 3 2 : 1. 50 : X = 2. 25 mol Convert to mass 2 KCl + 3 O 2 3 X 2. 25 mol x 32. 0 g/mol = 72. 0 grams Cool!
![Try This We want to produce 2 75 mol of KCl How many grams Try This: We want to produce 2. 75 mol of KCl. How many grams](https://slidetodoc.com/presentation_image/5f7e906dcb7074c2f18fb0b76e7a4cbf/image-13.jpg)
Try This: We want to produce 2. 75 mol of KCl. How many grams of KCl. O 3 would be required? Soln l KCl. O 3 : KCl 2 : 2 X : 2. 75 X = 2. 75 mol In mass: 2. 75 mol X 122. 55 g/mol = 337 grams zooo zimple!
![MassMass Problems l l There are four steps involved in solving these problems Make Mass-Mass Problems l l There are four steps involved in solving these problems: Make](https://slidetodoc.com/presentation_image/5f7e906dcb7074c2f18fb0b76e7a4cbf/image-14.jpg)
Mass-Mass Problems l l There are four steps involved in solving these problems: Make sure you are working with a properly balanced equation. Convert grams of the substance given in the problem to moles. Construct two ratios - one from the problem and one from the equation and set them equal. Solve for "x, " which is usually found in the ratio from the problem. Convert moles of the substance just solved for into grams.
![MassVolume Problems Just follow mass problem to the penultimate level Mass-Volume Problems Just follow mass problem to the penultimate level](https://slidetodoc.com/presentation_image/5f7e906dcb7074c2f18fb0b76e7a4cbf/image-15.jpg)
Mass-Volume Problems Just follow mass problem to the penultimate level
![Like this There are four steps involved in solving these problems l Make sure Like this: There are four steps involved in solving these problems: l Make sure](https://slidetodoc.com/presentation_image/5f7e906dcb7074c2f18fb0b76e7a4cbf/image-16.jpg)
Like this: There are four steps involved in solving these problems: l Make sure you are working with a properly balanced equation. l Convert grams of the substance given in the problem to moles. l Construct two ratios - one from the problem and one from the equation and set them equal. Solve for "x, " which is usually found in the ratio from the problem. l Convert moles of the substance just solved for into Volume.
![Conversion of mole to volume No of moles Volume Molar volume Can you Conversion of mole to volume No of moles = Volume Molar volume Can you](https://slidetodoc.com/presentation_image/5f7e906dcb7074c2f18fb0b76e7a4cbf/image-17.jpg)
Conversion of mole to volume No of moles = Volume Molar volume Can you remember a similar equation?
![Molar volume The molar volume is the volume occupied by one mole of ideal Molar volume The molar volume is the volume occupied by one mole of ideal](https://slidetodoc.com/presentation_image/5f7e906dcb7074c2f18fb0b76e7a4cbf/image-18.jpg)
Molar volume The molar volume is the volume occupied by one mole of ideal gas at STP. Its value is: 22. 4 dm 3
![Practice Problems Calculate the volume of carbon dioxide formed at STP in dm 3 Practice Problems Calculate the volume of carbon dioxide formed at STP in ‘dm 3'](https://slidetodoc.com/presentation_image/5f7e906dcb7074c2f18fb0b76e7a4cbf/image-19.jpg)
Practice Problems Calculate the volume of carbon dioxide formed at STP in ‘dm 3' by the complete thermal decomposition of 3. 125 g of pure calcium carbonate (Relative atomic mass of Ca=40, C=12, O=16) Solution: Convert the mass to mole: Molar mass of Ca. CO 3 = 40 + 12 + (16 x 3) = 100 gmol-1 Mole = mass/molar mass 3. 125/100 = 0. 03125 mol
![Practice Problems As per the equation Mole ratio 1 1 problem 0 03125 Practice Problems As per the equation, Mole ratio 1 : 1 problem 0. 03125](https://slidetodoc.com/presentation_image/5f7e906dcb7074c2f18fb0b76e7a4cbf/image-20.jpg)
Practice Problems As per the equation, Mole ratio 1 : 1 problem 0. 03125 mol X X = 0. 03125 mol of CO 2 Convert mole to volume [slide 17] 3 x 22. 4)dm Volume = (0. 03125 = 0. 7 dm 3
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