Science9-Q2-Module-7-reduced-file-1.pdf, Slides of Chemistry

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Republic of the Philippines Department of Education Regional Office IX, Zamboanga Peninsula Science Grade 9 Zest for Progress Zeal of Partnership 9 Quarter 2 - Module 7 Mole Concept Name of Learner: ___________________________ Grade & Section: ___________________________ Name of School: ___________________________ Name of Learner: ___________________________ Grade & Section: ___________________________ Name of School: ___________________________ Name of Learner: ___________________________ Grade & Section: ___________________________ Name of School: ___________________________ Name of Learner: ___________________________ Grade & Section: ___________________________ Name of School: ___________________________ Name of Learner: ___________________________ Grade & Section: ___________________________ Name of School: ___________________________ 1 Score: _______ /18 This module will lead you in the world of Chemists who measures out a chemical substance by weighing them since particles of substances are too small to count individually to form the desired quantity of a new product. Excited to know how scientist count the number of particles present in a certain substance? This module will help you understand how to quantity in the microscopic level. However, if you have any queries about the activities, you can contact your science teacher or you may ask Mr. google to guide you. Here are the activities for you: Activity 1: What’s in the Number? Activity 2: Avogadro’s Life Activity 3: Avogadro’s Number Activity 4: Molar Mass Activity 5: Mass of Mole in a Substance Activity 6: Mole Map Activity 7: Happy Mole’s Day Activity 8: A Chemist’s Mole As you go through this module, you will be able to use the mole concept to express the mass of substances(S9MT-Iii-19) In real life situations, pieces of matter are quantified by finding the mass or by counting. Market vendors for example, would rather sell mongo seeds by getting the mass and salted eggs by counting. The choice of quantifying goods is determined by convenience. It is easier to get the mass of rice grains rather than count the grains. It is more convenient to count the number of eggs rather than get their mass. To measure these quantities, mass units such as kilogram or gram, or counting units such as dozen or case are being used. As you go through this module, you will surely learn to love what and where we can use the mole concept. Module 7 Mole Concept What I Need to Know What’s In Activity # 1: What’s in the number? Directions: Using the periodic table of elements on page 14, answer the given activity below. Name: _____________ Atomic No.:_______ Atom Mass: ________ Valence Electron: ______ Name: _____________ Atomic No.:_______ Atom Mass: ________ Valence Electron: ______ 4 9 4 What is It You have just experienced how chemists determine the number of particles by getting the mass. It is impossible to count the number of atoms present in a gold bar or the number of molecules present in a glass of water but by knowing their masses, computations can be done which will eventually their masses, computations can be done which will eventually give the number of particles with the use of a number called Avogadro’s number. Avogadro’s number is the number of particles in one mole of a substance. It is a very large number equal to 6.02 x 1023 particles. So, a mole(mol) of a substance is 6.02x1023 representative particles of that substance. The representative particles can be atoms, molecules or formula units. So, one mole of carbon-12 contains 6.02x1023 atoms for elements molecules for covalent compounds, or formula units for ionic compounds. So, one mole of carbon contains 6.02x1023 atoms, one mole of water contains 6.02x1023 water molecules and a mole of sodium chloride (table salt) contains 6.02x1023 formula units of sodium chloride. For you to figure out how large Avogadro’s number is, try to imagine this, “ if you put together 6.02x1023 basketballs, it will be as big as the Earth or if you have 6.02x1023 rice grains, it would cover the land masses of the Earth to a depth of 75 meters.” Now that you have realized how big Avogadro’s number is, let us try to visualize the number of particles in a given sample. Example: How many molecules are there in 4.0 moles of CO2? To answer this question, you have to consider this: 1 mole= 6.02x1023 particles Thus, using dimensional analysis approach, you will be able to convert the number of moles to its equivalent amount in the number of particles. 4.0 moles CO2 X 6.02 x 1023 molecules CO2 = 2.41 x 1024 molecules CO2 1 mole CO2 Moles and Molar Mass The mole is the “counting unit” used by chemists to indicate the number of atoms, ions, molecules or formula units present in a particular chemical sample. The mole is similar to other counting units that you’ve used before….. Pair(2), dozen(12), and gross(144). One mole of a compound contains Avogadro’s number(6.02x1023) of molecules (molecular compound) or formula units (ionic compound). The molar mass of a compound tells you the mass of 1 mole of that substance. In other words, it tells you the number of grams per mole of a compound. The units for molar mass are, therefore, gram/mole. To find the molar mass 1. Use the chemical formula to determine the number of each type of atom present in the compound 2. Multiply the atomic weight (from the periodic table) of each element by the number of atoms of that element present in the compound. 3. Add it all together and put units of gram/mole after the number. Example 1: Find the molar mass of sodium carbonate, Na2CO3. Na 2 x 23.0 = 46.0 C 1 x 12.0 = 12.0 O 3 x 16.0 = 48.0 Molar mass = 106.0 g/mole 5 Score: _______ /25 Example 2: What is the molar mass of calcium nitrate, Ca(NO3)2? Ca 1 x 40.1 = 40.1 N 2 x 14.0 = 28.0 O 6 x 16.0 = 96.0 Molar Mass = 164.1 g/mole To make sure that you clearly understand the concepts about mole. Here is an experiment for you. What’s More Activity # 5: The Mass of One Mole in a Substance MATERIALS: 6 pcs 100 ml beaker or small jars of the same size Platform Balance or Weighing Scale (Timbangan) Periodic Table of Elements PROCEDURE: 1. For Table 4-A, consult the periodic table of elements for the atomic mass, which has the same numerical value with its molar mass. For Table 4-B, compute the molar mass of the compound using this formula: (Number of atom A X atomic mass of A) + (Number of atom B X atomic mass of B) Example: MgCl2 (1 x 24.21g) + (2 x 35.45g) = 95.11g Table 4-A: Molar Mass of Some Common Elements Element Symbol Mass (g) Molar Mass (g/mol) Sulfur (Asupre) Lead (Tingga) Copper (Tanso) Table 4-B: Molar Mass of Some Common Compounds Compound Chemical Formula Mass (g) Molar Mass (g/mol) Water H2O Table Salt NaCl Table Sugar C12H22O11 2. Get the mass of an amount equal to one mole of the substances in tables 4-A and 4-B. Put the sample substances in containers of the same size. Observe closely the amount equal to one mole. Guide Questions: 1. Do you think that one mole of the different substances have the same amount? 2. What do you observe about the mass of the substances in Tables 4-A and 4-B? 3. Would 1.5 moles of H2O have the same number of particles as 1.50 moles of any substances you weighed? 4. What can you infer from this activity? Did you enjoy doing the task? The next activity that you are going to answer is the summary of what mole concepts is all about. You are almost there! 6 Is made up of Whose mass Is expressed in Whose amount may be expresses in terms of Which may be Equal to MATTER Score: _______ /10 Score: _______ /12 Activity # 6: Mole Map DIRECTIONS: Complete the following concept map with the appropriate terms using the following words: Ions, Avogadro’s number, Mole, Atoms, Molecules, Particles, Mass, Compound, g/mole (molar mass), Elements Activity# 7: Happy Mole’s Day!!! Many other substances adopt their own unique properties due to arrangement of electrons. The propane gas that we use to fuel a gas grill is a gas at room temperature because the molecules are weakly attracted to each other. Unlike water, they don’t really want to be next to each other at all. Consequently, the space between them results in a gaseous state. Another important gas is oxygen. We need oxygen to live out our lives. Close your eyes and take a deep breath. As you do that, the molecules are whizzing through your nose, into your lungs where about 0.001 moles of oxygen are absorbed into your blood. Those molecules are responsible for helping each cell in your body produce energy so that your eyes can see the words on this page and your brain can think about what they mean, all while keeping your heart beating. So, if you ever feel like you’re too insignificant to make a difference, just remember that even the smallest of things matter in the grand scheme of things. Question: No matter how big or small you are in this vast world, how can you be an impact to society in a way that will be pleasing to the lord? What I Have Learned What I Can Do Periodic Table of the Elements 755,845 {— stomic number 762.5 1.83 26) a . | electronegativity i$ Iron | ceacmorsesttns [Ar] 3d* ds? 10 mim 28 Ni = tar 3 a i as a mia 7S q Pt Poni: da a ol en 11 Ze 113 117 Ds \Rg|En Nh Fl Mc. |lv lTs.. |Og_ ff Ma zg ao e 3 z iE Bein? tu [i akksli metals [7] alkaline earth metals [lanthanides [Ltransition metals [LJ unknown properties [Tpostaransition metals [7] metalloids [[] reactive nonmetals [7] noble gases (actinides 10 Reference Book Chemistry; Science and technology Textbook for Third Year Reprint Edition, 2006, 2009, Revised Edition, 2004, First Edition, 1991 Links: Introductory Chemistry: Retrieved August 12, 2020 from https://www.courses.lumenlearning.com/suny-mcc- introductorychemistry/chapter/formula-mass-and-mole-concept-from/ Mole Conversion: Retrieved: August 12, 2020 from https://courses.lumenlearning.com/introchem/chapter/mass-to-mole- conversions/ Mole Concepts: Retrieved August 20,2020 from https://byjus.com/chemistry/mole-concept-basics/ Picture Amadeo Avogadro: Retrieved from August 25,2020 from https://www.famousscientists.org/amedeo-avogadro/ Periodic Table of Elements: Retrieved from August 13,2020 https://commons.wikimedia.org/wiki/File:Periodic_table_large.svg Development Team Mi Ultimo Adios Writer: Dondon Vicente V. Minor Editors: Margie Lou C. Jacob Laarni A. Adonis Kathleen Joy B. Padilla Joly C. Baradero Reviewer: Sandy R. Albarico Illustrator: Layout Artist: Management Team: Majarani M. Jacinto, CESO VI SDS-ZDS Visminda Q. Valde, Ed.D ASDS Raymond M. Salvador, Ed.D ASDS Juliet A. Magallanes, Ed.D CID Chief Florencio Caballero EPS -LRMDS Sandy R. Albarico EPS -Science Adios, Patria adorada, region del sol querida, Perla del Mar de Oriente, nuestro perdido Eden! A darte voy alegre la triste mustia vida, Y fuera más brillante más fresca, más florida, Tambien por tí la diera, la diera por tu bien. En campos de batalla, luchando con delirio Otros te dan sus vidas sin dudas, sin pesar; El sitio nada importa, ciprés, laurel ó lirio, Cadalso ó campo abierto, combate ó cruel martirio, Lo mismo es si lo piden la patria y el hogar. Yo muero cuando veo que el cielo se colora Y al fin anuncia el día trás lóbrego capuz; Si grana necesitas para teñir tu aurora, Vierte la sangre mía, derrámala en buen hora Y dórela un reflejo de su naciente luz. Mis sueños cuando apenas muchacho adolescente, Mis sueños cuando joven ya lleno de vigor, Fueron el verte un día, joya del mar de oriente Secos los negros ojos, alta la tersa frente, Sin ceño, sin arrugas, sin manchas de rubor. Ensueño de mi vida, mi ardiente vivo anhelo, Salud te grita el alma que pronto va á partir! Salud! ah que es hermoso caer por darte vuelo, Morir por darte vida, morir bajo tu cielo, Y en tu encantada tierra la eternidad dormir. Si sobre mi sepulcro vieres brotar un dia Entre la espesa yerba sencilla, humilde flor, Acércala a tus labios y besa al alma mía, Y sienta yo en mi frente bajo la tumba fría De tu ternura el soplo, de tu hálito el calor. Deja á la luna verme con luz tranquila y suave; Deja que el alba envíe su resplandor fugaz, Deja gemir al viento con su murmullo grave, Y si desciende y posa sobre mi cruz un ave Deja que el ave entone su cantico de paz. Deja que el sol ardiendo las lluvias evapore Y al cielo tornen puras con mi clamor en pos, Deja que un sér amigo mi fin temprano llore Y en las serenas tardes cuando por mi alguien ore Ora tambien, Oh Patria, por mi descanso á Dios! Ora por todos cuantos murieron sin ventura, Por cuantos padecieron tormentos sin igual, Por nuestras pobres madres que gimen su amargura; Por huérfanos y viudas, por presos en tortura Y ora por tí que veas tu redencion final. Y cuando en noche oscura se envuelva el cementerio Y solos sólo muertos queden velando allí, No turbes su reposo, no turbes el misterio Tal vez acordes oigas de citara ó salterio, Soy yo, querida Patria, yo que te canto á ti. Y cuando ya mi tumba de todos olvidada No tenga cruz ni piedra que marquen su lugar, Deja que la are el hombre, la esparza con la azada, Y mis cenizas antes que vuelvan á la nada, El polvo de tu alfombra que vayan á formar. Entonces nada importa me pongas en olvido, Tu atmósfera, tu espacio, tus valles cruzaré, Vibrante y limpia nota seré para tu oido, Aroma, luz, colores, rumor, canto, gemido Constante repitiendo la esencia de mi fé. Mi Patria idolatrada, dolor de mis dolores, Querida Filipinas, oye el postrer adios. Ahi te dejo todo, mis padres, mis amores. Voy donde no hay esclavos, verdugos ni opresores, Donde la fé no mata, donde el que reyna es Dios. Adios, padres y hermanos, trozos del alma mía, Amigos de la infancia en el perdido hogar, Dad gracias que descanso del fatigoso día; Adios, dulce extrangera, mi amiga, mi alegria, Adios, queridos séres morir es descansar. 11 Answer Key-Gr9Q2W7 Science What I know: 1. A 6. D 11. B 2. D 7. D 12. A 3. C 8. A 13. B 4. A 9. B 14. C 5. B 10. C 15. D What’s In 1. Name: Beryllium Atomic No.: 4 Atomic mass: 9 Valence Electron: 2 2. Name: Sulfur Atomic No.: 16 Atomic mass: 32 Valence Electron: 6 3. Name: Cesium Atomic No.: 55 Atomic mass: 133 Valence Electron: 1 4. Name: Fluorine Atomic No.: 9 Atomic mass: 19 Valence Electron: 7 5. Name: Rubidium Atomic No.: 37 Atomic mass: 85 Valence Electron: 1 6. Name: Polonium Atomic No.: 84 Atomic mass: 209 Valence Electron: 6 What’s New 1. Equal volumes of gases contain same number of particles 2. While explaining Brownian motion 3. 6.02x10 23 particles per mole 1. 1.204x10 24 mol neon 2. 3.01x10 23 mol Cl 3. 1.505x10 23 mol O2 4. 0.5 mol 5. 3 mol Molar mass: 2. 106 3. 17 4. 40 5. 110 6. 180 What’s More 4-A Symbol Mass Molar Mass S 32 32 Pb 207 207 Cu 64 64 4-B Mass Molar Mass 17 18 58 58 342 342 1. No 2. Differ from one another 3. Yes 4. One mole of different substances has the same number of particles but different masses What I have Learned 1. Particles 2. Atoms 3. ions 4. Molecules 5. Mole 6. g/mole 7. Avogadro’s Number Assessment: 1. D 6.A 11. B 2. C 7. C 12. A 3. A 8. D 13. B 4. B 9. A 14. C 5. D 10. B 15. D Additional Activities: 1. 197 7. 197 2. 180.18 8. 234.24 3. 78.08 9. 2 4. Molecule 10. 1.505x10 24 5. Molecule 11. 6.02x10 23 6. 110.03 12. 1.806x10 24 M P O G A S L R A A T O M S R I O M O L E C U L E A L E S E S I O N S