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Hot Ice What’s the Problem with the Solution? The Scientists of Medaille Present
Hot Ice What’s the Problem with the Solution? The Mad Scientists of Medaille Present
Words to Know Freeze Melt Solvent Solute Saturated Supercooled Exothermic Nucleation
Freeze To turn from a liquid into a solid. Water freezes into ice at 0 o C or 32 o F
Melt To turn from a solid into a liquid. Lead melts at 700 o C Ice melts at 0 o C
Solutions SATURATED SOLUTION no more solute dissolves UNSATURATED SOLUTION more solute dissolves SUPERSATURATED SOLUTION becomes unstable, crystals form
Supercooled Liquid A liquid is supercooled if it is below its freezing point without becoming solid.
Exothermic An exothermic reaction releases heat. It puts out heat
An endothermic reaction is one that gets cold. It takes in heat Salt and ice
Nucleation The beginning of a phase transition. 3 phases of matter: Solid, Liquid and Gas.
Today`s Experiment Making Hot Ice
How? Make solution using a special solvent and solute. Supercool solution Provide a nucleation point.
What Should Happen Observe phase change It will freeze. Exothermic: gets hot.
Sodium Acetate: NaCH 3 COO Used in textile and rubber production Vinegar flavoring agent Solute
Tasteless and odorless Many industrial uses Common food additive Serious property damage Injury & death Dihydrogen monoxide Solvent
Lab Safety Eye protection No loose clothes Wash your hands Don’t touch your eyes No horse play.
Procedure 1 l solvent to near boiling. Add 800 g of solute. Stir until dissolved. Add solute until saturated
Procedure Continued Add solute →no more will dissolve Add solvent → all is dissolved.
Procedure Continued Pour into clean container Stand until cool Pour into small containers for experimentation.
Remember This Guy? The same thing is going on with the water as with the sodium acetate!
The ice in the glass is providing a nucleation point for the water
Supercooled to below freezing (30 o F, or -2 o C) Nucleation point Phase change Exothermic (32 o F, or 0 o C)
It’s just harder to do this with water because supercooled water is not as stable as the sodium acetate solution
Your Topic Goes Here Your subtopic goes here
Your Topic Goes Here Your subtopic goes here
I’m a real caffeine molecule Elements Page
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.
3.3 Phase Changes 1. What are six common phase changes? 2. What happens to a substance’s temperature and a system’s energy during a phase change? 3. How.
Saturated and Unsaturated Solutions. Dissolving How does something dissolve to make a solution? Dissolving Animation Activity: Measure out 20mL of water.
Solutions and Solubility Solution- a homogeneous (blended) mixture of 2 or more substances. Solute- dissolved species in a solution. The smaller component.
Changes of State Chapter 3 Section 3. Energy & Change of State The change of a substance from one physical form to another is a change of state or phase.
Food Chemistry. Distinguish between pure substances and mixtures. Compare homogeneous and heterogeneous mixtures. Define solutions. Distinguish.
What are some Properties of Solutions? What are the way dissolving may be increased Distinguish between saturated and unsaturated How do solutes have.
A Physical Property. A Definition of solubility: A measure of how much solute can dissolve in a solvent at a given temperature. What is a solvent? A substance.
Saturation & Solubility Is there a limit to how much sugar you can dissolve in a cup of tea?
When you are making ice cream, the temperature around the ice cream mixture needs to be lower than 32 F if you want the mixture to freeze. Salt mixed with.
Energy Changes & Phase Changes Heating & Cooling Curves.
Properties of Matter BC Science Probe 7 Section 4.1 Pages
Growing Crystals Background and Sulfur Lab. Crystal -Review Definition: group of atoms that form a particular repeating pattern Definition: group of atoms.
Section 3.3 Phase Changes. Phase Change- is the reversible physical change that occurs when a substance changes from one state of matter to another. There.
Water is made up of molecules. Water changes state (gas, liquid, solid) when it’s molecules are heated or cooled.
How much can dissolve?. If you continue adding sugar to lemonade, eventually the point is reached when no more sugar dissolves and the excess granules.
CHAPTER 8 Solutions, Acids, and Bases. 8.1 Formation of Solutions.
Bellringer: Write question and answer in complete sentences What happens to a saturated solution if it is heated?
Chapter 12. Do Now Use our mixture of salt, pepper, and iron, and marbles to come up with a definition for mixtures.
MATTER Read each slide. Look closely at each picture. Answer each question.
CHANGING STATES OF MATTER Ms. Kathy Ramírez. EVAPORATE THE CHANGE FROM A LIQUID TO A GAS.
Heat: Phase Change. 'change of phase' 'change of state'. The term 'change of phase' means the same thing as the term 'change of state'. o These changes.
Pre-Lab 4.1. Purpose To determine if you can dissolve all of a solid into a liquid.
Section 3.3 – Phases Changes. Key Concepts (you should be able to answer these questions) What are six common phase changes? What happens to a substance’s.
Water and Solutions Concentration Solutes, Solvents, and Water concentration: the amount of each solute compared to the total solution. Concentration.
Solvent Part of the solution that is present in largest amount and dissolves a solute What liquid is called the “ universal solvent ” ? WATER Solvent -
SOLUTIONS. What is a solution? A mixture that has the same composition throughout Also known as a homogenous mixture Made of solutes and solvent.
MATTER SOL 5.4. If you put water (a liquid) into an ice cube tray and put it in the freezer, what state would it become eventually?
Solubility Ch. 22 (With emphasis on section 2). What is a solution? ► A mixture that has the same composition, color, density, and even taste throughout.
Changes of State. Is the change of a substance from one physical form to the other All changes of states are physical changes, this means that the identity.
Properties of Matter. Important Vocabulary -Physical Property -Solubility -Melting Point -Boiling Point -Solvent -Solute -Saturated -Unsaturated -Supersaturated.
ISAT Preparation Chemistry Mixtures, Physical, and Chemical Changes.
Lesson 2: The affect of Temperature on Change in State of Matter.
Solutions C-16 Properties of solutions Solutions … Mixture (but special) Solute + solvent Homogeneous (molecular level) Do not disperse light.
Chapter 8 Solutions, Acids, and Bases. 8.1 Formation of Solutions DISSOLVING Recall that a solution is a _____________ ________of two or more substances.
Heating & Cooling Curves Do Now: Name the phase change S L L G G L L S S G G S Melting (fusion) Boiling (vaporization) condensation Freezing.
We can all tell what is hot and what is cold. We use our sense of touch to tell us if things are hot or cold. We can feel what is hot and what is cold.
Lab # 8. Key Terms Homogeneous Vs. Heterogeneous Saturated Vs. Unsaturated Solute Vs. Solvent Moles Vs Molarity Percent Weight and Percent Volume.
EXPLAINING A HEATING CURVE FOR ICE, WATER & STEAM H H O.
Bellringer What would happen to the particles of a substance if it were cooled to absolute zero? In other words, how would they behave? 2.Do.
Solutions Are homogeneous mixtures Are homogeneous mixtures A physical combination of two or more substances, that appear to be only one A physical combination.
Ice Cream Lab Pictures and Notes. What happened Adding the sugar, milk and vanilla together created a physical mixture Ice Cream was made because enough.
NOTES: 17.1 – Thermochemistry – The Flow of Energy.
Solutions and Dissolving Rates When you see the word solution what do you think of? Page 35.
Phase Changes. Review: 5 Phases of Matter Solid Liquid Gas Plasma Bose-Einstein Condensate.
Crystallization is a separation technique that is used to separate a solid (SOLUTE) that has dissolved in a liquid (SOLVENT) and made a solution (homogenous.
The Nature of Energy u Energy is the ability to do work or produce heat. u It exists in two basic forms, potential energy and kinetic energy.
Section 1: Solutions and Molarity Solutions Solutions are homogeneous mixtures The substance you have more of is the solvent (the substance that you.
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