Practice Set- Balancing Reactions Section I - Place the appropriate coefficient on the line in front of each species to balance each equation and then under each equation identify the reaction type. 1. ____ Cu +_______Cl2 ® _________ CuCl 2. _____ H2O ® ______ H2 + _______ O2 3.______ KBr + _______ AgNO3 ® ______ KNO3 + _______ AgBr 4. ______ CH4 + _______O2 ® ________ CO2 + ________ H2O 5._______ Zn + _______ HCl ® ________ H2 + _______ ZnCl2 6. _____Fe + ______ H2O ® _______ Fe3O4 + _______
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Data Collection: Mass of FA1 | Mass of empty weighing bottle and FA1 (±0.001) /g | 5.821 | Mass of empty weighing bottle (±0.001) /g | 4.321 | Mass of FA1 (±0.002) /g | 1.500 | Volume of FA3 prepared = 250.00 ± 0.12 cm3 Volume of FA3 used for titration = 20.00 ± 0.06 cm3 Titration of FA3 against FA2 | | Run 1 | Run 2 | Run 3 | Final volume of FA2 (± 0.05) /cm3 | 25.30 | 25.40 | 25.45 | Initial volume of FA2 (± 0.05) /cm3 | 0.00 | 0.00 | 0.00 | Volume of FA2 used (± 0.10) /cm3
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MATTER AND CHANGE Name _____________________________________ PRACTICE PROBLEMS Period _________________ Date ______________ SECTION 2.1 MATTER 1. Which of the following is not a physical change? a. dissolving sugar in water b. burning gasoline in an engine c. evaporating sea water to obtain salt d. slicing a piece of bread 2. Which of the following is not a property of a gas? a. has a definite shape b. has no definite volume c. assumes the shape of
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Chapter 6 practice MULTIPLE CHOICE 1. The formula for acetic acid‚ CH3CO2H‚ is an example of a(n) a.|condensed formula.| b.|mathematical formula.| c.|structural formula.| d.|molecular formula.| ANS: A OBJ: Goal #3.1: Interpret‚ predict‚ and write formulas for ionic and molecular compounds 3. Which of the following statements are correct? 1.|Metals generally lose electrons to become cations.| 2.|Nonmetals generally gain electrons to become anions.| 3.|Group 2A metals
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Photosynthesis Green plants absorb light energy using chlorophyll in their leaves. They use it to react carbon dioxide with water to make a sugar called glucose. The glucose is used in respiration‚ or converted into starch and stored. Oxygen is produced as a by-product. The equation for photosynthesis: Carbon Dioxide + Water (+ Light Energy) → Glucose + Oxygen Symbol equation: 6CO2 + 6H2O ------> C6H12O6 + 6O2 (http://www.bbc.co.uk/schools/gcsebitesize/science/add_aqa_pre_2011/plants/plants1
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Pre Lab Experiment 8 DETERMINATION OF % COMPOSITION OF PENNIES USING REDOX AND DOUBLE DISPLACEMENT (PRECIPITATION) REACTIONS Objectives: 1. Learn how to determinate the percent composition 2. Learn how to get the percent using oxidation reduction and double reactions 3. To become more familiar with the use titration techniques 4. To learn how to get the salt out of an quimical Background: To develop and utilize procedures to determine the percent composition‚ of ZnCI2. As well titrating
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Chapter 12 section 1 review 1) what characteristics of gases makes them different from liquids or solids? Gases have particles that are have a greater distance apart from each other than the particles between a solids and a liquid 2) why are gasses considered fluids? Gasses are fluids because they are able to flow 3) what’s happens to gas particles when a gas is compressed? When a gas is compressed it will move gas particles closer and make the volume smaller. 4) what is the
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METALS Lose electrons and form positive cations. NON-METALS gain electrons and form negative anions. IONS Are charges particles. EXMAPLES Atomic Notation and Bohr Diagrams Lewis Dot Diagram Examples Lewis Dot Diagrams of an Negative ION (NON-METAL) Negative ions have 8 valence electrons! Lewis Dot Diagram of an Ionic Compound Lewis Dot Diagrams of an Positive ION (METAL) Positive Ions have no valence electrons! The Octet Rule REMEMBER! All elements want
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Oxidation-Reduction Activity Series Peter Jeschofnig‚ Ph.D. Version 42-0186-00-01 Lab RepoRt assistant This document is not meant to be a substitute for a formal laboratory report. The Lab Report Assistant is simply a summary of the experiment’s questions‚ diagrams if needed‚ and data tables that
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October 13‚ 2012 Needle through a Balloon Pre-Lab Preparations: Purpose: The purpose of this experiment is to see if the balloon pops when pierced with a wooden skewer or a sharp pin. Hypothesis: If we lubricate the skewer with petroleum jelly‚ then it should go through the balloon without popping. Hypothesis for the 2nd part of the Lab: If we cover the side of the balloon with cellophane tape‚ then it will not pop when pierced with the pin. Materials: • Balloons • Long wooden
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