Lab Skills Focus: Filtration magnesium + sodium sulfate carbonate carbonate sulfate Chemical Equation MgSO 4 + Na 2 CO 3 MgCO 3 (s) + Na 2 SO 4 Word.

Slides:



Advertisements
Similar presentations
Conservation of Mass Lab (R) Conservation of Mass Lab (R)
Advertisements

Recognizing Chemical Reactions
6.02 ChemLive Exothermic and Exothermic Reactions
Chemical Reactions And Equations
Mole relationships in chemical equations
Exothermic- Endothermic Labs Make-up. Exothermic Lab Exothermic means energy is being released from the reaction into the surrounding air Heat turns from.
Chapter 9 Chemical Reactions. 9.1: Reactions & Equations Objectives Recognize evidence of chemical change Represent chemical reactions with equations.
MiniLab: Limiting reagents versus Excess reagents
Seconds Remaining: Many chemical reactions occur around the home. – Describe one chemical.
Chemical Reactions & Chemical Equations
Step 1: Energy must be SUPPLIED to break chemical bonds: Step 2: Energy is RELEASED when new chemical bonds are made:
Endothermic/Exothermic Processes & Reactions
Endothermic/Exothermic Processes Fall 2013 Vanderbilt Student Volunteers for Science Training Presentation.
Introduction to Chemical Reactions
Endothermic / Exothermic Lab
Lab Activity #4: Quantitative Analysis Chemical Background – Vinegar is a solution of water that contains acetic acid (CH 3 COOH). Baking soda is pure.
When a substance undergoes a chemical change, it takes part in a chemical reaction. Recognizing Chemical Reactions Chemical Reactions and Equations: Basic.
Table of Contents Chapter Preview 6.1 Observing Chemical Change
Chapter 6 Chemical Reactions and Equations
Chemical Reactions.  Atoms interact in chemical reactions: Chemical reaction: produces new substances by changing the way in which atoms are arranged.
Chemical Reactions. Produce new substances by changing the way in which atoms are arranged. Produce new substances by changing the way in which atoms.
BY: BUBBALO21 Chemical reactions Rx.  The process In which one or more substances is changed into another.
Section 4.1 CHEMICAL REACTIONS. A chemical reaction occurs when 2 or more substances combine to form a new substance. Reactants – materials that are combined.
2 pt 3 pt 4 pt 5pt 1 pt 2 pt 3 pt 4 pt 5 pt 1 pt 2pt 3 pt 4pt 5 pt 1pt 2pt 3 pt 4 pt 5 pt 1 pt 2 pt 3 pt 4pt 5 pt 1pt Section 1 Section 2 Section 1 Section.
Chemical Reactions. A _________ ___________ is the process in which one or more substances change to make one or more new _________. The properties of.
Chemical Reactions Cornell Notes page 139.
Chemical Reactions: is the process by which one or more substances change to produce one or more different substances.
Chemistry Created by Educational Technology Network
Chp 8 pg 240. A. Describing Chemical Reactions 1. Intro: a. Chem reaction – one or more substances is changed into one or more different substances b.
Which of These do not belong Burning match Rusting bike Curing cement Mixing baking soda and vinegar.
 The part of atoms that are affected in chemical reactions are electrons.  What’s happening?! Atoms of a same or different element are rearranging themselves.
Chemical reaction. Chemistry How do we know a chemical reaction has taken place?
Chapter 6 Chemical Reactions Chemical Reactions. Chemical Reactions In a chemical reaction, one or more reactants is converted to one or more products.
Table of Contents Observing Chemical Change Describing Chemical Reactions Controlling Chemical Reactions Chemical Reactions.
Chapters 7 and 8. What is a chemical reaction  A chemical reaction (a.k.a, chemical change) is a process in which one or more substances change into.
Starter: Test Review 12/3/2015 Practice/Application /Connection/Exit : Test Review. Glue here before test 12/3/2015 Test Review EQ: How can comparing.
Yield Noadswood Science, Yield Monday, January 25, 2016  To be able to calculate the yield from chemical reactions.
Activity #34- Signs of a Chemical Reaction. Chemical Reactions Produce new substances by changing the way in which atoms are arranged. Produce new substances.
+ Chemistry Year Conservation of Mass in Experiments.
Chapter 5 Chemical Quantities and Reactions Chapter 5 Chemical Quantities and Reactions 5.7 Mole Relationships in Chemical Equations 1.
Chapter 6 Chemical Reactions.
(c) S. Coates  Everything around us is made of atoms. These atoms are constantly interacting with each other.  We call those interactions chemical.
Today’s Learning Objectives  Review Physical Properties and Physical change  Chemical Change = Chemical Reaction  Energy in a reaction  Conservations.
Agenda:  Warm-up: Word Equations  Chemical reactions and energy  Endothermic or exothermic  How energy is represented in chemical reactions  Practice:
Thermochemistry. Energy Energy – the ability to do _________ or produce _________ Exists in 2 forms:  Kinetic energy – energy of _________  Potential.
Chemical Equations Is a chemical reaction that is written using chemical formulas Can also be written in words Vinegar + Baking Sodium + Water + Carbon.
Chemical Reactions. Know the difference: physical or chemical? Physical Changes form, shape, phase but not what it is Cutting, grinding, molding, breaking.
Physical and Chemical Changes. Let’s Review: In A Physical Change.... A substance is changed physically, but not chemically. It is still the same substance.
Topic 7.  Chemical Reactions Two or more substances undergo a reorganization of atoms to form other substances.  Reactants The substances that go.
Chemical Reactions Ch 2.1 Observing Chemical Change Ch 2.2 Describing Chemical Reactions Table of Contents – Book L.
Activity 20: Modeling Polymers Warm up: Write the reactants and products of the chemical equation below. Is the equation balanced?
Endothermic and exothermic reactions
Chemical Change Change in the identity of the substance.
Chemical Reactions Chapter 10.
Introduction to Chemical Reactions
Chapter 6 - KEY CONCEPTS (Page 1)
Chemical Reactions.
Targets for this Unit the properties of the products of a chemical reaction are different from the properties of the reactants. that in a chemical reaction.
Activity #28- Signs of a Chemical Reaction
Changes in Matter 2.3 PHYSICAL CHANGE
Reactions and Equations
Chemistry: Day 3 Iron Oxide Lab.
Chemical Reactions Table of Contents Observing Chemical Change
Chemical Reactions Table of Contents Observing Chemical Change
Physical Properties of Matter
Evidence of Physical verses Chemical Change
INTRODUCTION Thermochemistry: the branch of chemistry that focuses on the heat released or absorbed in a chemical reaction. Many chemical reactions involves.
Demo – Elephant Toothpaste
Law of Conservation of Mass
Thermochemistry.
Presentation transcript:

Lab Skills Focus: Filtration

magnesium + sodium sulfate carbonate carbonate sulfate Chemical Equation MgSO 4 + Na 2 CO 3 MgCO 3 (s) + Na 2 SO 4 Word Equation Clear liquid

When solutions of two soluble salts are mixed, a solid may form. This solid is called a precipitate. and the reaction is called a precipitation reaction. Precipitation reactions are used to make insoluble salts. In this example the soluble salts are magnesium sulfate and sodium carbonate, and the insoluble salt formed is magnesium carbonate.

Law of Conservation of Mass

Instructions 1. Measure 5 g of baking soda and put into a flask. 2. Measure 20 mL of vinegar and carefully pour it into a balloon. 3. Carefully attach the balloon to the top of the flask without spilling the vinegar into the flask. 4. Place the flask with balloon on a weighing scale and record the mass of the system. 5. Tip the vinegar from the balloon into the flask and record your observations. 6. Measure the mass of the system after the reaction. 7. Pop the balloon and measure the mass again.

Summary 1.Explain whether your results support the Law of Conservation of Mass.

There are times when mass might appear to change during a chemical reaction. If you experience this during an experiment, be sure to remember the Law of Conservation of Mass. The change in mass must be accounted for in a way other than destroying or creating atoms.

Endothermic and Exothermic Reactions (Heat Change)

Exothermic and Endothermic Reactions An energy change accompanies the forming or breaking of a bond between atoms in a molecule. O Energy is released (produces heat) when a bond forms Exothermic o Energy is absorbed from the surroundings to break the bonds in a molecule Endothermic

In your notebook: Draw a diagram of the set-up Make a data table Make a graph Calculate temperature change as a function of time

Endothermic Reaction 1.Make a blank table for recording results. 2.Pour 25 mL of acetic acid into a 400 mL beaker. 3.Record the temperature of acetic acid as the starting temperature. 4.Keep the thermometer in the acetic acid and add 5 g of baking soda into the beaker. 5.Watch the thermometer carefully and record the time for each degree Celsius drop. 5.Graph the rate of temperature change. 6.Calculate the rate of temperature change. Explore Lab 1: Energy change

Maximum C – Minimum C = Rate of temperature change Total Time (sec) Calculating Rate of temperature change Temperature/T degrees CTime/sec Starting temperature- ex

Endothermic Reaction Explore Lab: Energy change Summary: Explain how this lab shows a chemical reaction. How does the graph show that the reaction is endothermic? Explain.

Endothermic reaction results: Starts at around 25 degrees C and ends at around 21 degrees C Happens within about 2 minutes Endothermic Reaction

Exothermic Reaction: Oxidation of steel wool 1.Put 8 grams of wool into a 400 mL beaker. 2.Add enough acetic acid to completely cover the wool. 3. Swirl for 2 minutes to remove the protective coating. 4. Pour the acetic acid into a waste beaker. 5. Quickly cover the beaker with Parafilm. 6. Insert a thermometer through the film and into the steel wool. 7. Record the time for each degree Celsius rise and follow the temperature/time profile through a 5 degree change. Explore Lab 2: Energy change

Exothermic reactions The reaction produces heat. In this reaction vinegar is used to remove the protective coating from steel wool, allowing it to rust. When the iron combines with oxygen, heat is released.

Exothermic Reaction: Oxidation of steel wool Summary: Explain how this lab shows a chemical reaction. On the same graph (endothermic), show a graph of temperature change as a function of time. How does the graph show that the reaction is exothermic? Explain.

Exothermic Reaction: Oxidation of steel wool 4Fe + 3O 2 2Fe 2 O 3 4 Fe + 6 O = 4 Fe + 6 O 4 Fe + ___ O 2 2 Fe 2 O 3 Applying the Law of Conservation of Mass: How many atoms of Oxygen is needed to react with 4 atoms of Iron to form 2 units of Iron oxide?