Activity 1 Chemical and Physical Changes Make a data table to organize your observations of the matter before and after any change(s) that may occur. Wash your hands thoroughly with warm water and soap or detergent before leaving the laboratory. They placed each substance into a beaker of acid and recorded their observations. Identifying Exothermic & Endothermic Reactions. Evidence of a Chemical Change 1. Fill a 100-mL beaker about one-fourth full of tap water. Complete Data Tables 2 and 3, identifying each change you observed as chemical or physical. Get a piece of copper wire from your teacher. Observations Before: Observations After: Evidence of Chemical Reaction (Circle all that apply) 1-energy. What are the indications of a chemical change, a chemical reaction? When energy is absorbed in an endothermic reaction, the temperature decreases. Label each substance on seven pieces of paper. Exercise 2 I. Get a piece of magnesium from your . /21 /21 : Conclusion: Please reproduce all sections (prelab, procedure, observations, data tables, calculations and critical thinking questions) of this lab in your comp book. LAB REPORT 4 Observations of Chemical and Physical Change PART 1 - OBSERVATIONS OF CHEMICAL CHANGE No credit will be given for this lab report if the Data section is not completely filled out and if the required photographs are not received. Anion Confirmation Tests. Observations DATA TABLE 1 Material Observations Test tube 1: magnesium chloride . Record observations on the data table. Data, Results: Provides results & detailed observations (and diagrams where appropriate) that are presented in correctly labelled tables with descriptive, numbered titles. The product chemical is different from what you started with, the chemical formula does change. 2. Record your observations of both the solid and the . Day Three Data Table. Which reactions produced a precipitate? Light the wood split using a match until it takes fire and allow it to burn itself out on the ceramic tile. G1 The reaction . Explain your answer. Data Table 1. Purpose: To learn how qualitative and quantitative observations of a chemical reaction are used to formulate a hypothesis. Unexpected color change 2. (Be sure to make observations regarding both the solution and the zinc.) III. To remove the tarnish from the ring, students placed it in a pan lined with aluminum foil and added hot water. A gas or a solid may be formed where the products are in a different . Describe the change in color for each of these reactions. Write a balanced chemical equation for five of those reactions. 5 Word(s) 2Ag+2No +2Na+S = Ag S+2Na+2No 2Ag+S = Ag S. 3. Well Chemical #1 (4 drops) Chemical #2 (4 drops) Observations: Chemical Change (Y/N) A1 NaHCO 3 Sodium Bicarbonate HCl Hydrochloric Acid When the HCL was added, it bubbled for about 2 seconds then stopped. Without stirring, add 1 level teaspoonful of the solid to the water. Record your observations of the crystals and the inside of the test tube while heating it. Predicted Type(s) of Reaction : Single-displacement reaction Observations of Products : Copper is in solid state and zinc sulfate in aqueous state. Chemistry questions and answers. For this reason, physical changes can be reversed. Label each substance on seven pieces . I believe that this is the result of a chemical change. Heat an ice cube in a beaker. Monitor temperature change. At least one photograph must show the student's face. Heat an ice cube in a beaker. Set one tube aside as a color standard against which to judge color changes in the other tubes. When energy is released in an exothermic reaction, the temperature of the reaction mixture increases. Answer : Reaction 1 : Add Zinc to Copper Sulfate. Chemical Reactions. Purpose: The purpose of this experiment is to observe chemical changes in common consumer products to determine if the chemicals are basic, acidic, or remain neutral when mixed with other chemicals. Note: Always make as many observations as possible . Record your initial observations. Describe the similarities and/or differences between heating and burning the magnesium metal. Cu and HCl 3. Examine the wire and note any change in its appearance caused by heating. These changes can be divided into 2 classes: physical changes and chemical changes. 1. In a physical change, one or more physical properties of a substance are altered. See average annual change for different time periods at the bottom of this table. Use your data table above to identify the physical and chemical changes observed in the demonstrations as follows: Complete Data Chart above filling in Scientific Methods for each demonstration. A1 Bubbles immediately formed and started popping (not rapidly). Leave the substance in the container. The chemical mixtures are noted below in the Data Tables. Allow to react for several minutes and observe the resulting chemical reaction. Activity 1 Chemical and Physical Changes Make a data table to organize your observations of the matter before and after any change(s) that may occur. C.1.3 Recognize indicators of chemical changes such as temperature change, the production of a gas, the production of a precipitate, or a color change. 2)Use your results and observations in Data Tables 1, 2, and 3, to create a flow chart for the identification of an unknown (both an unknown anion and cation), using the AgNO3 and HCl confirmation tests and the cation flame tests. Background 1. 3-1 Chemical and Physical Change - Lab (Doc) 3-1 Chemical and Physical Change - Lab Answers (PDF) 3-1 Chemical and Physical Change - Lab Answers (Doc) Background Theory: Physical changes usually involve a compounds state of matter where heat energy is added or removed. Put your cans in the hood to recycle or in a recycling bin. Observations of Chemical and Physical Changes Hands-On Labs, Inc. 1. Be detailed in your observations. 2-color change. Data Table 1: Chemical Change Observations. When the chemicals in the soda mix with the air while being poured into the glass, a gas is released. Chemical Reactions. Allow to react for several minutes and observe the resulting chemical reaction. B A new substance is being formed. Chemical Reactions. Use the drop-down menu options to record any physical and/or chemical changes observed. These include: 1. b. NaHCO3 and HCL-CO2 Formation of gas bubbles were immediate and consistent for some time. Boil a small amount of water. (Be sure to make observations regarding both the solution and the zinc.) Add one drop each of 1 M Fe(NO 3) 3 and 1 M KNCS to 25 mL of distilled water. (physical and chemical data) George H. Thomson,AIChE Design Institute for Physical Property Data. (Tables 2-6, 2-30, 2-164, 2-193, 2-196, 2-198, 2-221) D.G. Date Table 1: Anion Confirmation Tests. Leave the substance in the container. 2 3 B I U 3 2 3 -2 2. Procedure Copy Tables 2-1 and 2-2 into your laboratory notebook. Do not touch the substance. Social Psychology Observation Paper. Table 1: Chemical Reaction Recorded Data Record reaction changes; temperature changes, mass changes, phase changes, etc. Based on their observations, students are then asked to explain the evidence that a chemical reaction occurred. Part 1: The Physical Properties of Matter - Examine each substance carefully. Fill the 100-mL beaker about one-fourth full with distilled water. Physical change is a change in which the substance changes form but keeps its same chemical composition (reversible). Tables 2-1 Physical Properties of the Elements and Inorganic . Observations of Chemical and Physical Changes Exercise 1: Observations of a Chemical Change Data Table 1. Adapted with permission. Procedure: In this experiment, various chemicals were mixed together, to determine a reaction. Boil a small amount of water. Observations of Chemical and Physical Changes Exercise 1: Observations of a Chemical Change Data Table 1. Background: Chemical reactions involve the rearrangement of atoms or ions to create new substances with different properties. A chemical change is also called a chemical reaction. Test the effect of a magnet on each substance by passing the magnet undershow more content. Data Table 1: Chemical Change Observations. of copper (II) chloride to the water. 1) To observe physical and chemical properties. observations, and type of change for each task. Data As you perform the experiment, record your data and observations in these tables. Change in odor 3. I believe that this is the result of a chemical change. Record observations of this solution in your data table. 4. Add the zinc to the test tube. Zn and HCl In-lab Question 1. VISTA HEIGHTS 8TH GRADE SCIENCE. 3. 10. Data Table 4. A color change transfer. To observe the physical and chemical properties of several substances. Record examined observations of physical appearance. Record examined observations of physical appearance. your observations in the Data Table. Using crucible tongs, hold the wire in the hottest part of a burner flame for 1 to 2 minutes. Rounded sample about a cm in length. This could be seen more easily with the black paper underneath the well plate. Information, Data, and Observations Part 1. Record your observations in Data Table 4. Chemical Reactions. Exercise 2: Heating and Combustion. 2) To decide if an observed change is physical or chemical. Then allow the melted wax to cool. Thank you. Heat the whole test tube until no more changes occur. B I U. Experiment Observations Experiment #1 Magnesium reaction in krucible Type of Reaction: $ Balanced Chemical Reaction: Experiment #2 Heating copper (II) carbonate hydroxide Type of Reaction . Well Chemical #1 (4 drops) Chemical #2 (4 drops) Observations: Chemical Change (Y/N) A1 NaHCO 3 Sodium Bicarbonate HCl Hydrochloric Acid Bubbled and fizzed to the top. The balanced chemical reaction : Melt a small amount of candle wax. Part 1 Data Table: SUBSTANCE FORMULA . This essay was written by a fellow student. Grinding, melting, dissolving, and evaporating are all physical changes. Record your observations in the data table on your report sheet. 2. Record your observations in the data table. 1. Identify the following as examples as either Physical or Chemical changes . PHYSICAL AND CHEMICAL PROPERTIES DATA SHEET: Report all values with units and the proper number of significant figures. The major clues which indicate a chemical reaction are: 1. Lab # 6: Physical and Chemical Changes 7 PRESTUDY 1. Data Tables and Observations. Exercise 2: Heating and Combustion. Explain your answer. Version 42-0182-00-03 Abstract: Observations: Exercise 1: Observations of a Chemical Change Data Table 1. Well Chemical #1 (4 drops) Chemical #2 (4 drops) Observations: Chemical Change (Y/N) A1 NaHCO 3 Sodium Bicarbonate HCl Hydrochloric Acid The product was clear, the reactant caused the product to bubble slightly. Write each Light the wood split using a match until it takes fire and allow it to burn itself out on the ceramic tile. page 1 Thermochemistry: Measuring Enthalpy Change in Chemical Reactions Experiment created by the UMaine InterChemNet Team. Data Table 1 - Chemical Reactions Well Chemicals Observations Chemical Change? The Dissolved Inorganic Phosphorus (DIP) varied between 0.2 M and 1.3 M in winter (Table 1), while it varied between 0.1 M and 1.6 M in summer (Table 2).The highest concentration is . Explain your answer using the observations collected in Data Table 2 Year AL AR AZ CA CO CT DE FL GA IA ID IL IN KS KY LA MA MD ME MI MN MO MS MT NC ND NE NH NJ NM NV NY OH OK OR PA RI SC SD TN TX UT VA VT WA .