Stoichiometry Pronounced: Stoy-kee-AHM-uh-tree. What is stoichiometry? Its math that helps us to see the relationship between what is used and formed.

Slides:

Advertisements

Similar presentations

Stoichiometry Jeopardy

Advertisements

Stoichiometry Ratios The stoichiometric coefficients in a balanced chemical reaction can be used to determine the mole relationships between any combination.

The following problems refer to FeSO4.

Reaction Stoichiometry Chapter 9. Reaction Stoichiometry Reaction stoichiometry – calculations of amounts of reactants and products of a chemical reaction.

Stoichiometry Chapter 12.

HONORS CHEMISTRY Feb 27, Brain Teaser Cu + 2 AgNO 3  2 Ag + Cu(NO 3 ) 2 – How many moles of silver are produced when 25 grams of silver nitrate.

Stoichiometry Chapter 12.

#29 When 84.8 g of iron (III) oxide reacts with excess of carbon

Stoichiometry Review Guide

Stoichiometry Chemistry Ms. Piela.

Section “Limiting” Reagent

New Section in Table of Contents

WHAT DO THE COEFFICIENTS IN A REACTION TELL US??!?!

Limiting Reactants & Percent Yield

Starter S moles NaC 2 H 3 O 2 are used in a reaction. How many grams is that?

Stoichiometry – “Fun With Ratios”

Unit 3: Chemical Equations and Stoichiometry

Bellwork November 5th Dig around in your brain and fill in the following… 1 mole = ___________________ atoms 1 mole = ___________________ liters 1 mole.

BRN  Complete the table using the balanced chemical reaction: ______CH 4 + ______O 2  _____CO 2 + _____H 2 O  Complete the table using the balanced.

Unit 6 Stochiometry. Information Given by Chemical Equations Example: CO (g) + 2H 2(g)  CH 3 OH (l) The numbers we put in front of each element is called.

Stoichiometry The Math of Chemical Reactions Unit 9.

The Math of Equations Stoichiometry

Stoichiopardy Holy Moley Do the 2 or 3 step Random Limit my Percent Q $100 Q $200 Q $300 Q $400 Q $500 Q $100 Q $200 Q $300 Q $400 Q $500 Final Chempardy.

Stoichiometry Jeopardy Percen t Yield Limiting Reactan ts “Stoiche d” About Chemist ry Q $100 Q $200 Q $300 Q $400 Q $ Q $100 Q $200 Q $300 Q $400.

Chemical Calculations

What quantities are conserved in chemical reactions? grams and atoms.

Stoichiometry Calculating Masses of Reactants and Products.

Things you must KNOW and what to expect  Things you must KNOW  You must KNOW your polyatomics  You must KNOW how to write a balanced formula  You have.

Stoichiometry – “Fun With Ratios” Main Idea: The coefficients from the balanced equation tell the ratios between reactants and products. This ratio applies.

Stoichiometry Notes (Chapter 9). I. Problems Involving Compounds a. Compounds are measured in molecules (or formula units) and single elements are measured.

Mass to Mass Stoichiometry Honors Chemistry Unit 5.

Stoichiometry mass and amount relationships between reactants and products in a chemical reaction.

Chapter #9 Stoichiometry. Chapter 9.1 Composition stoichiometry deals with the mass relationships of elements in compounds. Reaction stoichiometry involves.

Stoichiometry. Information Given by the Chemical Equation  The coefficients in the balanced chemical equation show the molecules and mole ratio of the.

Starter S moles of Iron (III) Hydroxide are used in a reaction. How many grams is that?

Quantities in Chemical Reactions. the amount of every substance used and made in a chemical reaction is related to the amounts of all the other substances.

Stoichiometry Chapter 12

Stoichiometry! The heart of chemistry. The Mole The mole is the SI unit chemists use to represent an amount of substance. 1 mole of any substance = 6.02.

Calculate the mass of Cu produced? Mass of beaker and Cu – mass of beaker.

Unit 8 Review Stoichiometry Complete on Markerboard or in your notes.

The Math of Chemical Reactions

CHAPTER 9 Design: Winter Colors: Elemental STOICHIOMETRY.

What is stoichiometry? A problem solving method used to calculate the amount of product made or amount of reactant needed in a chemical reaction What is.

Stoichiometry Warmup I have 1 mole of CO 2 gas at STP. How many grams of CO 2 do I have? How many Liters of CO 2 do I have? How many molecules of CO 2.

Limiting Reagents and Percent Yield Limiting Reagent If you are given one dozen loaves of bread, a gallon of mustard and three pieces of salami, how.

STOICHIOMETRY PRACTICE. BELLWORK #3 3/2/2011 Define the following terms: a) limiting reactant b) excess reactants c) Percent yield d) Theoretical yield.

Stoichiometry Notes (Chapter 12). Review of Molar Mass Recall that the molar mass of a compound is the mass, in grams, of one mole of that compound.

Students type their answers here

Chapter 9 Stoichiometry. Stoichiometry Composition Stoichiometry: deals with the mass relationships of elements in compounds. Reaction Stoichiometry:

Ch. 9-3 Limiting Reactants & Percent Yield. POINT > Define limiting reactant POINT > Identify which reactant is limiting in a reaction POINT > Define.

Unit 8 Review Stoichiometry. 1. Describe how a chemist uses stoichiometry? To determine the amount of reactants needed or products formed based on the.

Reaction Stoichiometry the numerical relationships between chemical amounts in a reaction is called stoichiometry the coefficients in a balanced chemical.

Let’s look at the butane reaction once more: 2C 4 H O 2 → 8CO H 2 O What do the coefficients represent? Stoichiometry is the use of these.

Let’s talk… mole to mole

Stoichiometry Introduction.

Stoichiometry The calculation of quantities in chemical equations.

Ch. 9 Notes -- Stoichiometry

Chapter 9 Stoichiometry

Stoichiometry Just Do It.

Stoichiometry Miss Knick HAHS Chem 1B.

Chapter 12 Review.

Chapter 12 Review.

HONORS CHEMISTRY Feb 27, 2012.

Unit 4: Chemical Equations and Stoichiometry

Unit 4: Chemical Equations and Stoichiometry

4/27/16 Today I will define stoichiometry and calculate mole-mole stoichiometry problems Warm Up Write a balanced equation for the reaction of magnesium.

Presentation transcript:

Stoichiometry Pronounced: Stoy-kee-AHM-uh-tree

What is stoichiometry? Its math that helps us to see the relationship between what is used and formed in a chemical reaction.

How do I do stoichiometry? Its just dimensional analysis.

What is the main key ingredient to stoichiometry? Mole ratios –Mole ratios are the way of getting from one part of the reaction to another

How do I get a mole ratio? Use the balanced equation. Oxygen reacts with hydrogen to make water.

Demo Copper reacts with Silver (I) Nitrate … Assume you have Cu +2 1.Predict your products. 2.Balance the rxn 3.Determine all the mole ratios that are possible

What will I be converting between in stoichiometry problems? Moles to moles Moles to grams Grams to moles Grams to grams

Mass of Given Moles of Given Molar Mass Mole Ratio Moles of Unknown Molar Mass Mass of Unknown

MOLES TO MOLES

NH 4 NO 3  N 2 O + H 2 O How many moles of H 2 O are produced if 3.65 moles of NH 4 NO 3 are decomposed?

Back to the Demo… If I began with moles of Cu, how many moles of Ag will form?

Again the Demo… If you have the same amount of Cu, how many moles of Copper (II) Nitrate will be made?

Determine how many moles of sodium chloride produced when 4.25 mol of chlorine gas reacts with sodium.

MOLES AND MASS

NaOH + H 2 SO 4  H 2 O + Na 2 SO 4 How many moles of sodium sulfate will be formed if you start with 222 grams of sodium hydroxide?

How many grams of H 2 and N 2 can be formed by the decomposition of mol of ammonia, NH 3 ?

MASS TO MASS

Pb(SO 4 ) 2 + LiNO 3  Pb(NO 3 ) 4 + Li 2 SO 4 How many grams of lithium nitrate will be needed to make 5.2 grams of lithium sulfate?

Bromine reacts with sodium chloride to form chlorine and sodium bromide. If you begin with 73.2 g of sodium chloride, how many grams of chlorine will be produced

If you begin with 4.125g of iron(III)nitrate and react it with sodium hydroxide, how many grams of iron (III) hydroxide will you make in the end?

C 6 H 10 + O 2  CO 2 + H 2 O If I do this reaction with 45 grams of oxygen, how many grams of carbon dioxide will be formed?

Problem! You have 27 cars with out tires, and 55 tires. How many complete cars can you make?

What is a limiting reactant? It is finding out which reactant will be used up first in a problem

What does in excess mean? It means you have so much you will not run out when the reaction is completed..

What do you have to do for limiting reactant problems? Do 2 stoich problems

How do I set them up? Start with each of the reactants and take them to grams.

A 2.00 g sample of ammonia is mixed with 4.00 g of oxygen. Which is the limiting reactant? Which is in excess? NH 3(g) + O 2 (g)  NO (g) + H 2 O (g)

Which is the limiting reactant? The one that makes the LEAST amount of product.

How do you answer the 2 types of questions? If it asks what is the LR, your answer is one of your reactants. If it asks how much is made, your answer is the lower of the 2 amounts produced.

Is this why a reaction stops? Yes, one of the reactants is used up.

What mass of water can be produced by 4g of H 2 reacting with 16g of O 2 ?

1)Write the balanced equation for the reaction of lead (II) nitrate with sodium iodide to form sodium nitrate and lead (II) iodide. 2)If I start with 25.0 grams of lead (II) nitrate and 15.0 grams of sodium iodide, how many grams of sodium nitrate can be formed? 3)What is the limiting reactant in the reaction described in problem 2?

What is percent yield? It is comparing how much yield you ACTUALLY get versus what you SHOULD get in the lab.

Is this different than Percent Error? YES! Percent error tells error in the lab, not the percent recovered.

What is the equation? Actualx100 Theoretical Actual is what you ACTUALLY got in the lab Theoretical is what you SHOULD have gotten in the lab

How do I find the theoretical? With a stoichiometry problem.

Zinc reacts with iodine to form zinc (II) iodide Calculate the theoretical yield if you start with 125.2g of zinc and 150.0g of iodine. Determine the percent yield if 215.6g of product is recovered.

CaCO 3  CaO + CO 2 Quicklime, CaO, can be prepared by roasting limestone, CaCO 3, according to the chemical equation below. When 2.00 x 10 3 g of CaCO 3 are heated, the actual yield of CaO is 1.50 x 10 3 g. What is the percent yield?