Critical and Non-Critical information Tuesday, 9/13 Day 2 Agenda 1. Please have these Items on your desk. Science Starters Sheet Reading Note Card Phase Change W.S. Critical and Non-Critical information 2- Fill out your Agenda. What are the top 5 critical ideas that are on your notecard? Share with your shoulder partner. Put a star by the non-critical answers that you and your shoulder partner have the same. Whole group: Highlight the answer on your notecard that you have the same as shown under the document camera.

Table of Contents Update Page 35 9/13 Mixtures & Solutions (Solute/Solvent)

MATTER Elements Compounds Homogeneous Heterogeneous Pure Substances Mixtures Elements Compounds Homogeneous Heterogeneous Particle: Atom Ex: O, H, Na, C Particle: Molecule Ex: H2O, NaCl, CO2 Parts not visible, evenly mixed Ex: Salt water, air,coffee Visibly different parts Ex: Salt + pepper, Water + sand

PURE SUBSTANCES Single kind of matter Specific composition Specific Properties Elements and Compounds Examples: CO2 Water Gold

ELEMENTS Most basic form of matter Cannot be seperated or broken down 116 elements in the Periodic Table http://www.chemicool.com Represented by symbols O, H, Fe, Au, He, Ne, C Smallest particle - atom

Carbon (Coal and diamonds) Examples Carbon (Coal and diamonds) Mercury Oxygen

Compounds 2 or more elements chemically combined in a set ratio Can only be separated by chemical methods electrolysis of water Represented by a formula Smallest particle- molecule

Examples water salt (sodium chloride) ammonia (NH4) rust (iron oxide) chalk (calcium carbonate) sugar (glucose)

MIXTURES 2 or more substances, combined, but NOT chemically Can be separated by physical means

Homogeneous mixtures Examples: Air Solutions (salt water) Alloys Evenly distributed particles Particles NOT visible The prefix: "homo"- indicates the same Have the same uniform appearance and composition throughout Examples: Air Solutions (salt water) Alloys

Heterogeneous mixtures Visibly different parts The prefix: "hetero"- indicates difference Examples: Salt and pepper Rice Soup Pizza Sulfur and iron

Mixtures and Solutions Solute and Solvent

Definitions Solute- The part of a solution present in a lesser amount and dissolved by the solvent. Solvent-The part of a solution that is present in the largest amount and dissolves a solute.

Mixtures Homogeneous mixtures Pure substances Solution Heterogeneous materials - can see two parts Homogeneous materials can see only one thing - one set of properties Mechanical Mixture Homogeneous mixtures They’re mixed together so well you only see one thing – it looks pure but it isn’t Pure substances You can only see one thing because there is only one kind of particle in it. Solution

Review Solutions Are solutions homogeneous or heterogeneous? Are solutions mixtures or pure substances? Mixtures What kind of states can a solution be? Solid, liquid, or gas What are the two “s” words that every solution must have? A solute and a solvent

In a salt water solution… Is salt the solute or the solvent? Solute Is water the solute or the solvent? Solvent What does the solute do? Gets dissolved What does the solvent do? Does the dissolving

A Salt Water Solution Solute (salt) Animation Solvent (water)

Dissolving

Solution Worksheet solute solute solute solute solute solute solute solvent solvent solvent solvent solvent solvent solvent solvent

Solution Worksheet SOLUTION solute solute solute solute solute solute 8. Minerals Water Hard Water 9. Water Sugar Maple Syrup 10. Acetic Acid Water Vinegar 11. Salt Water Ocean Water 12. Zinc Copper Brass 13. Water Air Humid Air solute solute solute solute solute solute solute solute Solution Worksheet solvent solvent solvent solvent solvent solvent solvent solvent