Water Properties Adnoc School PDF

Learning Objectives: I can Describe water as a polar molecule. Properties of Water 10/22/2024 Big idea Describe how pool water in the UAE is accommodated for thousands of tourists Big Idea Describe the solutions added in water a...

Learning Objectives: I can Describe water as a polar molecule. Properties of Water 10/22/2024 Big idea Describe how pool water in the UAE is accommodated for thousands of tourists Big Idea Describe the solutions added in water and their content. Explain how this reduces the risk of disease and bacteria. Learning Objectives: I can Describe water as a polar molecule. Starter Activity: “Class Discussion” 1) The earth is called “the blue planet” 2) “Where There is Water, There is Life” UAE LINK Learning Objectives: I can Describe water as a polar molecule. Success Criteria: ▪ Explain the polarity of water. ▪ Identify hydrogen bonds in water molecules. ▪ Compare cohesion, adhesion, and heat capacity  Learning Objectives: I can Describe water as a polar molecule. The Water Molecule P:47 SC 1 (-) (+) (+)  Learning Objectives: I can Describe water as a polar molecule The Water Molecule SC 1 Hydrogen has 1 proton; how many electrons (-) does it have? 1 Oxygen has 8 protons; how many electrons does it have? 8 What charge do protons have? + What charge do electrons have? - Do protons attract or repel electrons? (+) (+) Attract (unlike charges attract; like charges repel) If oxygen has 8 protons and hydrogen only has 1, to which nucleus are the electrons more attracted? The 8 protons of oxygen have a stronger pull on the electrons.  Learning Objectives: I can Describe water as a polar molecule Hydrogen Bonding SC 2 The attraction between a hydrogen atom with a partial positive charge and another atom with a partial negative charge is known as a hydrogen bond Hydrogen bond Learning Objectives: I can Describe water as a polar molecule Activity time SC 2 Hydrogen bond  Learning Objectives: I can Describe water as a polar molecule Quick Assessment This is a diagram of a molecule of water. ( ) ( ) ( ) 1) Write + and - symbols to the positively charged and negatively charged ends of the molecule. 2) Given the distribution of charges shown in this water molecule, why is it called "polar"? 3)Draw other 4 molecules around it and label  Learning Objectives: I can Describe water as a polar molecule AFL This is a diagram of a molecule of water. (+) (+) (-) 1) Write + and - symbols to the positively charged and negatively charged ends of the molecule. 2) Given the distribution of charges shown in this water molecule, why is it called "polar"? The charges are unevenly distributed in the molecule  Sept.3 Starter Activity: Source AP Classroom ▪ 1. Starter Activity: Source AP Classroom ▪ 2. Starter Activity: Source AP Classroom ▪ 3. Starter Activity: Source AP Classroom ▪ 3.  Learning Objectives: I can Describe water as a polar molecule Special properties of water ▪ Cohesion ▪ Adhesion ▪ Heat Capacity ▪ Surface tension ▪ Introductory activity:  Learning Objectives: I can Describe water as a polar molecule Special properties of water ▪ Starter Activity: Learning Objectives: I can Describe water as a polar molecule Cohesion SC3 Cohesion: attraction between molecules of the same substance The strong attraction between water molecules results in what is called “surface tension” and that because of surface tension, the surface of water can support very lightweight objects including the spider shown in the above picture  Learning Objectives: I can Describe water as a polar molecule Adhesion SC 3 Why do you think water molecules rise higher in narrower tubes? Peer activity ( 2minutes) Meniscus  Learning Objectives: I can Describe water as a polar molecule Adhesion SC 3 Why do you think water molecules rise higher in narrower tubes? Water molecules will rise higher in a narrow tube because a larger portion of the surface of the water is adhering to the glass. The adhesion between the water and the glass is stronger than the cohesion between the water molecules and pulls the water upward against gravity. Meniscus Comparison: Cohesion vs Adhesion SC 3 Literacy workshop: Textbook AFL: What property of water is at work on each hotspot in the below figures.Explain Adhesion Cohesion  Learning Objectives: I can Describe water as a polar molecule Heat Capacity SC3 UAE LINK  Learning Objectives: I can Describe water as a polar molecule Quick Assessment SC3 Identify which property of water cohesion, adhesion, or heat capacity applies to each observation below. 1- Large, circular lily pads are able to float on the water's surface. 2- The temperature of the water is about 5°C, while the temperature of the air is about 21°C. 3- Water rises in plant stem through xylem vessels. Quick Assessment SC3 Identify which property of water cohesion, adhesion, or heat capacity applies to each observation below. 1- Large, circular lily pads are able to float on the water's surface. Cohesion 2- The temperature of the water is about 5°C, while the temperature of the air is about 21°C. Heat Capacity 3- Water rises in plant stem through xylem vessels Adhesion Learning Objectives: I can Describe water as a polar molecule Exit Ticket SC3  Learning Objectives: I can Describe water as a polar molecule Early finishers: SC3 1) Describe the property of water that is indicated by the data. How is this property explained by the structure of water molecules and the bonds between them? 2) If you were to go to a sandy beach on a sunny summer day, which would feel warmer—the sand or the water? Explain why, using your knowledge of the properties of water. Learning Objectives: I can Describe water as a polar molecule Early finishers: SC3 Go to AP textbook Lesson: Chemistry of life Task: Solve questions on water properties  5 minutes: Starter Activity: Lesson recap Individual Activity Starter Activity: Lesson recap Starter Activity: Lesson recap  SC4 Properties of Water  Learning Objectives: I can Describe water as a polar molecule SC4 Starter Activity: “Class Discussion” How do plants move water against gravity? Cohesion and adhesion Learning Objectives ▪ Explain that water has high capacity. ▪ Compare the components of a mixture. ▪ Explain what happens to sodium and chloride ions in a solution.  Learning Objectives: I can Describe water as a polar molecule Homework – Correction SC4 1) Describe the property of water that is indicated by the data. How is this property explained by the structure of water molecules and the bonds between them? The graph shows that water has a higher heat capacity. This is due to the extra energy needed to break the hydrogen bonds between the molecule 2) If you were to go to a sandy beach on a sunny summer day, which would feel warmer—the sand or the water? Explain why, using your knowledge of the properties of water. Water has a higher heat capacity than sand, so it requires more energy before its temperature rises. Literacy Workshop – Solutions P:49 SC4 is a material composed of two or more elements or compounds that are physically mixed together but not chemically combined. the substance that is dissolved. the substance in which the solute dissolves. Is a type of mixture in which all components are evenly distributed.  Learning Objectives: I can Describe water as a polar molecule Visual learners: Solutions SC4 Based on the video provide one example of a solute, solvent, and a solution Example of a solute: Coffee, sugar.. Example of a solvent: Water Example of a solution: Coffee + Sugar + Water Learning Objectives: I can Describe water as a polar molecule Assessment: A Salt Solution SC4 Notice that the Cl- binds with the hydrogens (+) of water, while the Na + binds with the oxygen (-) of water. Solutions SC4 Water’s polarity gives it the ability to dissolve both ionic compounds and other polar molecules. Table salt (NaCl) seem Why does the salt seem to disappear? to disappear when they Its ions break apart and move throughout the dissolve in water. water, so they no longer form visible, solid crystals. Notice that the Cl- binds with the hydrogens of water, while the Na+ binds with the oxygen. Learning Objectives: I can Describe water as a polar molecule Exit Ticket SC4  Learning Objectives: I can Describe water as a polar molecule Lesson 3 Properties of Water  Learning Objectives: I can Describe water as a buffer Starter Activity: “Class Discussion” When you dissolve a solid It might look like it disappears. Explain. According to mass, solutes are Still present Learning Objectives: I can describe water as a buffer. Success Criteria: ▪ Define suspensions. ▪ Compare acids and bases. ▪ Explain the importance of buffers. Learning Objectives: I can Describe water as a buffer SC1 Suspensions P:49 Pick out from the text the definition of suspensions Suspension: mixtures of water and nondissolved material  Learning Objectives: I can Describe water as a buffer Acids, Bases, and pH SC 2 pH is a measure of hydrogen ion concentration Low pH = acidic; higher concentration of H+ High pH = basic; lower concentration of H+ 1) Identify the pH that is neutral. Pure water, because some water Molecules split from H+ and OH- 2) How do the hydrogen ion concentrations of stomach acid and bleach compare with Human blood that of pure water? Pure water H+ ion concentration is higher for stomach acid and lower for bleach. Stomach acid Learning Objectives: I can Describe water as a buffer Buffers SC 3 Base Neutral Acid acidic pH Unbuffered base + acid = _________ basic pH Buffered base + acid = ________  Learning Objectives: I can Describe water as a buffer Homework – Science Skill Activity on Savvas SC 3 Learning Objectives: I can Describe water as a buffer Answer Key SC 3 Learning Objectives: I can Describe water as a buffer Exit Ticket SC 3 Learning Objectives: I can Describe water as a buffer SC 3 Learning Objectives: I can Describe water as a buffer SC 3 Learning Objectives: I can Describe water as a buffer SC 3 Learning Objectives: I can Describe water as a buffer SC 3 Learning Objectives: I can Describe water as a buffer SC 3 AFL Exit Ticket  Learning Objectives: I can Describe water as a buffer Lesson Review Check: SC 3 1.What does it mean when a molecule is said to be “polar”? 2. Why is water such a good solvent? 3. What is a buffer? Why is it useful to cells? 4. Identify some beverages that are mixtures. Classify them as solutions, suspensions, or neither. Explain your classifications. 5. Describe two observations of water that provide evidence that water molecules are attracted to one another. Lesson Check list