9W 4.1(b) Classifying Matter 2024 PDF

4.1 (b) Classification of Matter LEARNING GOALS: ❑ TO LEARN ABOUT THE CLASSIFICATION OF MATTER AS A PURE SUBSTANCE OR AS A MIXTURE. ❑ ALSO TO LEARN HOW MIXTURES CAN BE FURTHER CLASSIFIED AS A MECHANICAL MIXTURE, A SUSPENSION, AND A SOLUTION.  What was learned yesterda...

4.1 (b) Classification of Matter LEARNING GOALS: ❑ TO LEARN ABOUT THE CLASSIFICATION OF MATTER AS A PURE SUBSTANCE OR AS A MIXTURE. ❑ ALSO TO LEARN HOW MIXTURES CAN BE FURTHER CLASSIFIED AS A MECHANICAL MIXTURE, A SUSPENSION, AND A SOLUTION.  What was learned yesterday? ⚫ What matter is ⚫ How it behaves when exposed to heat ⚫ Changes of state ⚫ Stipulations of the particle theory ⚫ Not covered yet… Ignore this… ⚫ What are the parts of a hypothesis? Explain each one. ⚫ What is a control?  I. Matter Matter is everything around us has mass and volume  II. Classifying Matter Matter is classified according to its physical properties Ex. An object’s state of matter, its colour, size, shape smell… An object’s physical properties are determined by its particle arrangement i. Mixtures  i. Mixtures Have two or more different types of particles Three kinds of mixtures: 1. mechanical mixtures 2. solutions 3. suspensions  A. Mechanical Mixtures More than one layer/phase visible (heterogeneous) Parts don’t change Examples: salads, nut mixes and spice mixes  B. Solutions Can only see one layer/phase (homogeneous) usually translucent (watch for alloys!) Examples: sugar dissolved in tea or coffee When you stir the sugar into the tea it appears to disappear  C. Suspension cloudy mixture, opaque usually (heterogeneous) particles of one substance are held within another. Tomato juice is an example of a suspension.  ii. Pure Substances one type of particle Each has a unique set of properties, such as melting point, boiling point, colour, and hardness. There are two types of pure substances: 1. elements 2. compounds  A. Elements most pure kind of substances; cannot split them into anything simpler Found on the periodic table; one kind of atom Examples: Oxygen (O2), Iron (Fe), Copper (Cu), Carbon (C) The Periodic Table  B. Compounds Are made by combining two or more different elements together one kind of molecule —travels as a package Molecules are made up of atoms/elements Example: sodium chloride molecule (NaCl, or salt) is made up of the of the elements/atoms of sodium and chlorine  Examples of Compounds Name: Water Formula: H2O Which elements is water made from? 2 hydrogen 1 oxygen How do we know its a compound? made up from 2 or more boxes on the periodic table! It has at least 2 capital letters in its formula!  Sal t Hot 10K Gold Ketchup Salt (NaCl) Dog Tank of oxygen Cup of tea, black Lotion Gas (O2) The Periodic Table  Soi Pizza Coke (opened) Sugar (C6H12O6) l Pops Cup of coffee, black Distilled Water The Periodic Table  Homework: ⚫ P. 143 # 1-4 ⚫ P. 147 #1-12 + review learning goals (filter Qs!) ⚫ Tips: ⚪ Remember, three minutes, three hours, three days? Do not pack up just yet! Start looking over your notes! ⚪ *Re-synthesising the mind map at the beginning of this note Put in quick definitions, examples and diagrams of the different types of matter—use this as your exam study sheet! Can you redraw it by memory???