Question of the Day What is the effect of salt on the melting and boiling point of water? When salt is added to ice, would a physical or chemical change.

Slides:

Advertisements

Similar presentations

Water, Steam, and Ice 1 Water, Steam, and Ice. Water, Steam, and Ice 2 Introductory Question A glass of ice water contains both ice and water. After a.

Advertisements

Salt and Water By: Steph. What Type Of Mixture is Saltwater? Saltwater is a Homogeneous Mixture because only one of the two types of particles are visible.

Colligative properties. Colligative property- a property of a solution that depends on concentration of solute (the number of solute particles dissolved)

Chemical and Physical Changes Mrs. Lowe April 2011.

10/16/ When a substance changes from one state of matter to another, the composition of the substance remains the same. The original substance.

Chapter 2.3 Changes of Matter. Review  What is the difference between a homogeneous and heterogeneous mixture? Provide one example of each.  Compare.

States of Matter Phase Change Trotter Phase Change Diagram.

Chapter 7 Lesson 3. Physical Change A change in size, shape, form, or state of matter Matter’s identity stays the same Matter does not become something.

How do solutes affect a solution’s boiling point?

Aim: How is the concept of colligative properties applied to the making of ice cream? What is a solution? A solution is a homogeneous mixture of a solute.

Can be observed using the 5 senses. Many can be measured.

Heating Curves. Energy and Phase Change When adding heat to a solid, energy added increases the temperature and entropy until the melting point is reached.

Colligative properties. Colligative property- a property of a solution that depends on concentration of solute (the number of solute particles dissolved)

Solubility and Rate of Dissolving Solubility depends on the substance being dissolved and the temperature of the solvent. e.g.:CaCl 2 is more soluble than.

The Effects of Temperature on Physical and Chemical Changes

Section 3.4—Changes in Matter What type of changes can produce a gas for an airbag?

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.

Colligative Properties of Solutions Boiling Point and Freezing Point.

Section Two or more substances that have been combined, but not chemically changed. In salt water, the salt and the water keep their own properties.

Solutions Integrated Science. Solutions Solutions are a type of Homogeneous Mixture – The whole solution looks the same. – You can’t see any of the individual.

Change, Change, Change! No, No! Not this kind of change… THIS KIND OF CHANGE!

Phase Changes. Phase Change Phase Change: Reversible physical change that occurs when substance changes from one state to another Energy is either released.

States of Matter Phase Change. Water Water exists on our planet in three states. Ice, water, and water vapor What causes water to be in one phase or another?

Physical and Chemical Changes

Section 3.4—Changes in Matter

7.P.2B.4 Plan and conduct controlled scientific investigations to answer questions about how physical and chemical changes affect the properties of.

Changes in Matter.

Changes of State All changes of state are physical changes, so the identity of the substance doesn’t change.

Physical and Chemical Changes

Boiling, Freezing, and Melting Water

Phase Changes A change from one state of matter (solid, liquid, gas) to another. Physical change because appearance is changed, not chemical make-up; reversible.

PHYSICAL CHANGE vs CHEMICAL CHANGE

Changes in State (PHASE CHANGES)—Notes

ICE CREAM DESIGN CHALLENGE

Can be observed using the 5 senses. Many can be measured.

Boiling, Freezing, and Melting Water

Physical and Chemical Changes

Physical and Chemical Changes

Chemistry Unit 7 Notes: Diffusion

Physical and Chemical Changes

Physical Phase Changes

Colligative Properties.

Section 1 – pg 256 Understanding Solutions

Other Properties of Solutions

Chapter 23: Change of Phase

Physical and Chemical Changes

Solutions Particles in Solution “Like Dissolves Like” Electrolytes

Solids, Liquids, and Gases

Physical and Chemical Changes

UNIT 2 Changes in State.

What happens to the mass when a solution is formed?

Physical and Chemical Changes

Physical and Chemical Changes

Physical and Chemical Changes

Chemical Reactions.

III. Particles in Solution

What are Chemical and Physical Changes?

States of Matter LO: I know what is meant by the three states of matter.

Colligative Properties.

Solutions Particles in Solution “Like Dissolves Like” Electrolytes

Changes of State Textbook pages

I can describe what happens during melting and freezing

Remember this from Page 7R?,

Heat & Phase Change (Latent Heat)

Physical and Chemical Changes

Classroom Reading Activities

Unit 3 Topic 3.

Boiling, Freezing, and Melting Water

Changes in Matter.

Presentation transcript:

Question of the Day What is the effect of salt on the melting and boiling point of water? When salt is added to ice, would a physical or chemical change occur? How do you know?

Revisit Salt causes the melting point of ice to decrease. Can be used in defrosting icy roads and making ice cream. Salt causes the boiling point of ice to increase. Can be used in cooking so that food will cook faster. Adding salt to water causes a physical change because the salt can be separated if the water is evaporated off by heating the solution.