Lab 8 Sodium Carbonate or Sodium Bicarbonate? Objective To determine a compound to be either Na 2 CO 3 or NaHCO 3.

Slides:

Advertisements

Similar presentations

MM= 342 amu Calculate the number of moles..

Advertisements

CHEMISTRY February 13, 2012.

How many grams of water will 5 grams of Oxygen produce? 5 grams of Hydrogen? Tonight's Homework: Finish Lab Report pg 259 Numbers 2-10.

Stoichiometry! The math of chemistry .

Limiting Reactant.  Determine which reactant is left over in a reaction.  Identify the limiting reactant and calculate the mass of the product.  Calculate.

9.3 Notes Limiting reagents.

Unit 3: Chemical Equations and Stoichiometry

Performance Assessment Stoichiometry

Baking Soda Lab Stoichiometry Key.

Percentage yield Perform calculations to determine the percentage yield of a reaction Atom Economy Perform calculations to determine the Atom Economy of.

Calculate the Molar Mass  Magnesium chloride Ammonium sulfate  Answers: g/mol; g/mol.

Sodium Bicarbonate Decomposition Edward A. Mottel Department of Chemistry Rose-Hulman Institute of Technology.

STOICHIOMETRY Part II Mole-Mole Relationships

Concentration of Solutions

STOICHIOMETRY CALCULATIONS COACH COX. MOLE TO MOLE CONVERSIONS Converting from moles of one substance in a chemical reaction to moles of another substance.

Balanced equations. HIGHER GRADE CHEMISTRY CALCULATIONS Calculation from a balanced equation A balanced equation shows the number of moles of each reactant.

Cobalt (III) carbonate C02(CO3)3 Iron (III) phosphide FeP.

Stoichiometry: the mass relationships between reactants and products. We will use the molar masses ( amount of grams in one mole of a element or compound)

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. What is stoichiometry? Composition stoich – deals with mass relationships of elements in compounds (review Ch 3) Reaction stoich – deals.

The Mole Stoichiometry Limiting Reactant % Yield

Lab 8, MOLE RATIOS IN A CHEMICAL REACTION NaHCO 3 (S) + HCl(aq)  CO 2 (g) + H 2 O(g) + NaCl(S) MATERIALS 150 mL beaker, pipet, small beaker, balance,

STOICHIOMETRY (Using balanced chemical equations to solve mole problems)

Limiting Reagents and Percent Yield Using Stoichiometry.

By Avery Carrico and Nick Ponturo. Mole- used to convert from atomic mass units to grams Scientists use the mole as a unit of measurement Abbreviation=

The Mathematics of Chemical Reactions Chemical Stoichiometry Quantitative Relationships between the reactants and products in a chemical reaction.

11.3 Moles of Compounds Objectives:

Stoichiometry Stoichiometry Consider the chemical equation: 4NH 3 + 5O 2  6H 2 O + 4NO There are several numbers involved. What do they all mean? “stochio”

Relative Formula Mass expressed in grams

Chapter 7 Reactions. Chemical Changes Substances react and form a new substance. Reactants go in. Products come out. Reactants Products Represented by.

Stoichiometry – Chemical Quantities Notes. Stoichiometry Stoichiometry – Study of quantitative relationships that can be derived from chemical formulas.

Stoichiometry Chemical Quantities Chapter 9. What is stoichiometry? stoichiometry- method of determining the amounts of reactants needed to create a certain.

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

Define mole ratio (What is it? How is it determined?)

Chap. 9: Stoichiometry Identify the mole ratio of any two species in a chemical reaction. Calculate theoretical yields from chemical equations.

Remembering: Molarity and Stoichiometry Because we know you brain is getting full!!!

The Math of Chemical Reactions

Sodium Bicarbonate and Hydrochloric Acid Stoichiometry Lab NaHCO 3 + HCl  Core II Preview.

Follow the method Let the units guide you. When nitrogen and hydrogen react, they form ammonia gas, NH 3. If 56.0 g of nitrogen are used up in the reaction,

Mass-Mass Stoichiometry If the mass of any reactant or product is known for a chemical reaction, it is possible to calculate the mass of the other reactants.

Solution Stoichiometry In solution stoichiometry, we are given a concentration and a volume which we use to determine moles. n = C x V Then we use molar.

MRS. PLATT HAD TO GO GET A NEW CANISTER OF PROPANE. WHEN SHE GOT BACK, IT WAS USED TO FIRE UP THE GRILL DURING A BACKYARD BARBEQUE. WHAT IS THE REACTION.

Good Morning! Today is Tuesday, January 5, 2016 HW Due: Balancing Review Please put in the Inbox Do-Now: What do you think the term stoichiometry means?

Section 9.3 Limiting Reactants and Percent Yield 1.Define the terms theoretical yield and actual yield. 2.Calculate percent yield 3.Identify reasons that.

Stoichiometry. Stoichiometry is the study of the mass relationships of the reactants and the products in a chemical reaction. How much stuff it takes.

Challenge Problem When nitrogen and hydrogen react, they form ammonia gas, which has the formula NH 3. If 56.0 g of nitrogen are used up in the reaction,

Mol ratio: coefficients of a balanced equation 2 H 2 + O 2 → 2 H 2 O 2 mol H 2 for every 1 mol O 2 In chemical calculations, mol ratios convert moles of.

Balancing Chemical Equations. Chemical Equations Review  Chemical equations need to be balanced due to the Law of Conservation of Mass.  This law states.

Baking Soda Lab Stoichiometry. Purposes: 1. Experimentally determine the actual mass of salt produced. Reaction: HCl + NaHCO 3  H CO 2 + NaCl Materials:

Qualitative Analysis: Quantitative Analysis: An analysis that determines what’s in a solution, the qualities of the solution. An analysis that determines.

Bell Ringer How many moles of Nitric acid are there in 250 g?

Find the % by mass of oxygen in water

Back to Mole Town! Agenda Review Mole Town map. Intro stoichiometry.

Objective - Experiment - Decomposition of Sodium Bicarbonate

Unit 6 ~ Stoichiometery (Chapter 9)

Quantity Relationships in Chemical Reactions

INTRODUCTION TO STOICHIOMETRY

Lab: Limiting Reactants

DO NOW Turn in Stoichiometry Practice, Part One handout.

Stoichiometric Calculations

Unit 4: Chemical Equations and Stoichiometry

Visualizing Limiting Reactant

Chapter 7 Reactions.

Unit 4: Chemical Equations and Stoichiometry

NaHCO3(S) + HCl(aq)  CO2 (aq) + H2O(g) + NaCl(S)

Chapter 9- Stoichiometry:

Presentation transcript:

Lab 8 Sodium Carbonate or Sodium Bicarbonate? Objective To determine a compound to be either Na 2 CO 3 or NaHCO 3.

NaHCO 3 + HCl  CO 2 + H 2 O + NaCl Na 2 CO 3 + 2HCl  CO 2 + H 2 O + 2NaCl Background NaHCO 3 = sodium bicarbonate (baking soda) Na 2 CO 3 = sodium carbonate HCl = hydrochloric acid g/mol g/mol g/mol g/mol

Slowly add drops of HCl to the dish until all of the solid has reacted. Slowly evaporate the liquid in the dish with the watch glass on top of the dish. Avoid spattering. Let the evap. dish cool. (M1) Mass of empty evap. dish + watch glass = ____ g Experiment - (M2) Mass of dish + watch glass gram of solid = ____ g (M3) Mass of evap. dish + watch glass + product = ____ g Clean out dish and watch glass.

1. What reactant was the excess reactant in this lab? Analysis - 4. Convert the mass of the NaCl into moles of NaCl (keep at least 3 sig figs) g Na 2 CO g Na 2 CO 3 = mol Na 2 CO g NaHCO g NaHCO 3 ÷ = mol NaHCO 3 6. If the solid was Na 2 CO 3, calculate how many moles reacted. 5. If the solid was NaHCO 3, calculate how many moles reacted. You started with 1.00 gram of a solid, ÷ 2. How many grams of the solid did you begin with? 3. Calculate the mass of the NaCl that was produced.

9. Identify the unknown as NaHCO 3 or Na 2 CO 3. Explain how you know. Results - 7. If the unknown was NaHCO 3, how many moles of NaCl would have been produced? 8. If the unknown was Na 2 CO 3, how many moles of NaCl would have been produced? Using your answers from 5 & 6 and the balanced chemical equations,