Resembled hot lava for a moment as the metal sunk into itself, became . Social Psychology Observation Paper. Evidence of a chemical change may be the result of chemicals reacting with one another. Gas . When Bromothymol Blue reacts with an acid, it turned orange, and when it reacts with a base, the end result is blue. Add the zinc to the test tube. Record your initial observations. Exercise 2: Heating and Combustion. Data Table 1. To decide whether certain observed changes are physical or chemical. 3. Use the drop-down menu options to record any physical and/or chemical changes observed. Solid, silver, bumpy dullish outer shell. Here we describe new and updated best practice data standards for discrete chemical oceanographic observations, specifically those dealing with column header . Describe the observations when answering this question. Allow to react for several minutes and observe the resulting chemical reaction. The product chemical is different from what you started with, the chemical formula does change. 2. Date Table 1: Anion Confirmation Tests. Data Table 2 contains nine double displacement reactions. When the chemicals in the soda mix with the air while being poured into the glass, a gas is released. Chemical Reactions. Record your observations in the data table. (1) Classify the following as chemical (C) or physical (P) changes. For this reason, physical changes can be reversed. Change in odor 3. To observe the physical and chemical properties of several substances. Evidence of a Chemical Change 1. Obtain 1-2 pieces of zinc (Zn). Please reproduce all sections (prelab, procedure, observations, data tables, calculations and critical thinking questions) of this lab in your comp book. (Be sure to make observations regarding both the solution and the zinc.) on determining if a physical or chemical change happened at your station. B I U. Describe the similarities and/or differences between heating and burning the magnesium metal. Part 1 Data Table: SUBSTANCE FORMULA . These changes can be divided into 2 classes: physical changes and chemical changes. . E1 The reaction turned dark blue. Two clear, colorless solutions are mixed and a yellow solid forms. *Changes of state are considered to be physical changes. Explain your answer. 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. Light the wood split using a match until it takes fire and allow it to burn itself out on the ceramic tile. 2. After analyzing your data, you will determine if there is evidence for a physical or chemical change. This essay was written by a fellow student. Record your observations in the data table on your report sheet. 2) To decide if an observed change is physical or chemical. Part 1: The Physical Properties of Matter - Examine each substance carefully. Monitor temperature change. Zn and HCl In-lab Question 1. Q. If Negative: no color change---no starch in the food being tested. Version 42-0182-00-03 Abstract: Observations: Exercise 1: Observations of a Chemical Change Data Table 1. Observations of Chemical Changes. Add a few drops of this solution to each of seven wells of a spot plate. Chemists have developed a list of common signs that may indicate the occurrence of a chemical change. 1) To observe physical and chemical properties. Interpretation - judgment or opinion about what you have observed 3. A1 Bubbles immediately formed and started popping (not rapidly). Label each substance on seven pieces . Well Chemical #1 (4 drops) Chemical #2 (4 drops) Observations: Chemical Change (Y/N) A1 NaHCO 3 Sodium Bicarbonate HCl Hydrochloric Acid Clear. Examples of such physical properties are: size, shape, color, and state of matter. Cu and HCl 3. Remember that when a chemical change occurs, a new substance must be formed. Turned black then red hot, momentary popping sound, area around sample forms white powder residue. What was the identity of the anion in Unknown #104? 2. G1 The reaction . Explain your answer. Identify the following as examples as either Physical or Chemical changes . Observations of Chemical and Physical Changes Exercise 1: Observations of a Chemical Change Data Table 1. VISTA HEIGHTS 8TH GRADE SCIENCE. Background: Chemical reactions involve the rearrangement of atoms or ions to create new substances with different properties. Outline those changes in properties or changes in energy that resulted from the chemical reactions you observe. Is cutting a cake into 8 pieces a chemical or a physical change? 3-gas formed 4-precipitate/solid formed. As you perform the experiment, record your observations in Data Table 1. (feels cooler) b. Exothermic - heat is released. 1) To observe physical and chemical properties. At least one photograph must show the student's face. Is cutting a cake into 8 pieces a chemical or a physical change? Experiment Observations Experiment #1 Magnesium reaction in krucible Type of Reaction: $ Balanced Chemical Reaction: Experiment #2 Heating copper (II) carbonate hydroxide Type of Reaction . 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. You may use it as a guide or sample for writing your own paper . Write each III. 2. Chemistry questions and answers. Indices of agricultural chemical input by State, 1960-2004 . When the chemicals in the soda mix with the air while being poured into the glass, a gas is released. Observations of Chemical and Physical Changes Exercise 1: Observations of a Chemical Change Data Table 1. Record examined observations of physical appearance. Exercise 2 Obtain 1-2 pieces of zinc (Zn). Zn and HNO3 4. (feels hotter) 4. In the provided data table, you will record observations that will help you decide which type of change has occurred. 1. Put your cans in the hood to recycle or in a recycling bin. A silver ring reacts with compounds containing sulfur in the air to form silver sulfide, a black substance that makes up the tarnish on the surface of silver objects. Be detailed in your observations. Data Table 1: Chemical Change Observations. Leave the substance in the container. Light the wood split using a match until it takes fire and allow it to burn itself out on the ceramic tile. If Positive: a dark blue color appear---there is starch in the food being tested. Based on their observations, students are then asked to explain the evidence that a chemical reaction occurred. Label each substance on seven pieces of paper. Answer : Reaction 1 : Add Zinc to Copper Sulfate. Data Table 1: Chemical Change Observations. Background 1. That gas causes the bubbles and fizzing. These include: 1. The major clues which indicate a chemical reaction are: 1. Unexpected color change 2. 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. Data, Results: Provides results & detailed observations (and diagrams where appropriate) that are presented in correctly labelled tables with descriptive, numbered titles. Rounded sample about a cm in length. What are the indications of a chemical change, a chemical reaction? I believe that this is the result of a chemical change. The evidence comes from observing the properties of the new substances. 4. I believe that this is the result of a chemical change. Fill a 100-mL beaker about one-fourth full of tap water. 2. Allow to react for several minutes and observe the resulting chemical reaction. of copper (II) chloride to the water. Test the effect of a magnet on each substance by passing the magnet undershow more content. A chemical change is a change in the composition of the original substance. Adapted with permission. 7. Did either heating or burning produce a chemical change? the original substance. Anion Confirmation Tests. 5 Word(s) 2Ag+2No +2Na+S = Ag S+2Na+2No 2Ag+S = Ag S. 3. Predicted Type(s) of Reaction : Single-displacement reaction Observations of Products : Copper is in solid state and zinc sulfate in aqueous state. Part 1 Data Table: SUBSTANCE FORMULA . 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. A precipitate (solid) forms 3. Pour about 4-5 mL of the iron-thiocyanate solution made above into three test tubes. Then allow the melted wax to cool. Obtain a sample of copper (II) chloride. They placed each substance into a beaker of acid and recorded their observations. your observations in the Data Table. Helium boils at 4.22 K. 2. Observations of Reactants : Zinc is in solid state and copper sulfate in aqueous state. Unexpected temperature change a. Endothermic - heat is absorbed. Heat an ice cube in a beaker. Part 1: The Physical Properties of Matter - Examine each substance carefully. Chemistry questions and answers. I. Data Table 1: Chemical Change Observations Chemical #1 Appearance Weil Chemical #1 (4 drops) A1 NaHCO, Sodium Bicarbonate Chemical #24 drops) Chemical #2 Appearance Observations Chemical Change (Y/N) HCI Hydrochloric Acid A2 IKI Indicator Starch A3 KI Potassium lodide A4 NaOH Sodium Hydroxide HCI Hydrochloric . Record observations of this solution in your data table. Add one drop each of 1 M Fe(NO 3) 3 and 1 M KNCS to 25 mL of distilled water. Baking soda was added to the hot water and stirred. Using crucible tongs, hold the wire in the hottest part of a burner flame for 1 to 2 minutes. 7. Heat Capacity of the Calorimeter Table 1. Record observations in Data Table 1. Day Three Data Table. When energy is absorbed in an endothermic reaction, the temperature decreases. 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. B. Record your observations in Data Table 4. 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. Operations to Introduce an External Stress- Record all observations in your data table. Grinding, melting, dissolving, and evaporating are all physical changes. Write a balanced chemical equation for five of those reactions. Tables 2-1 Physical Properties of the Elements and Inorganic . Chemical Reactions. b. B A new substance is being formed. Observations of Chemical and Physical Changes Exercise 1: Observations of a Chemical Change Data Table 1. (Tables 2-6, 2-30, 2-164, 2-193, 2-196, 2-198, 2-221) D.G. Record your observations of both the solid and the . Wash your hands thoroughly with warm water and soap or detergent before leaving the laboratory. While certain chemicals may react the same way with on mixture, testing a chemical with multiple mixtures will most likely allow the chemical to be identified. A chemical change is also called a chemical reaction. Data Table 4. Chemical changes: These do change the composition of the substance. A chemical change or reaction occurs when new kinds of matter are formed. When the chemicals in the soda mix with the air while being poured into the glass, a gas is released. 1. After the test tube has cooled, add 2 drops of water to the crystals and observe any changes that occur. Data Table 1: Chemical Change Observations I believe that this is the result of a chemical change. Set one tube aside as a color standard against which to judge color changes in the other tubes. Record your observations in the data table. Boil a small amount of water. (physical and chemical data) George H. Thomson,AIChE Design Institute for Physical Property Data. Station 1: Examine a wood splint and note its physical properties in the table below. Question: Experiment 1 Exercise 1 Data Table 1 Data Table 1: Observations of Chemical Reactions with Aluminium Foil AgNO3 CuSO4 CaCl2 Pb (NO3)2 Start Time colorless blue white colorless grayish white grayish white grayish white grayish white Initial Appearance of Chemical Initial Appearance of Foil Observations after 5 Minutes Observations . Friend, National Institutes of Standards and Technology, Boulder, CO. (Tables 2-333, Identifying Exothermic & Endothermic Reactions. 2. Cu and HNO3 2. Chemical Reactions. You will complete Section I as you carry out the experiment. Do not touch the substance. 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. Record your observations in the data table. Print this form and bring it with you to lab. This could be seen more easily with the black paper underneath the well plate. 1. PHYSICAL AND CHEMICAL PROPERTIES DATA SHEET: Report all values with units and the proper number of significant figures. Expobservations recorded in Data Table 1 to reach this conclusion how you used the. Do not touch the substance. Boil a small amount of water. Bubbles of gas appear 2. Experiment #3: Observing a Chemical Reaction II. Follow your teacher's instructions for disposing of the used chemicals. 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 . Prelab Questions. 1. -Part A: Record all observations of Part A in Data Table 1 1. Question/ Well Number Chemicals Reactions/Observation. (2) Write the following underlined reaction in terms of a balanced equation. Melt a small amount of candle wax. A / A1. OBJECTIVES 1. Observation - statement of fact, based on what you detect by your senses 2. V. Conclusion (Discuss the lab's purpose and what you observed and learned about chemical changes) Questions: Station 1: Examine a wood splint and note its physical properties in the table below. Differentiate between a physical and a chemical change. One well will serve as a color standard against which to judge color changes in the . Complete Data Tables 2 and 3, identifying each change you observed as chemical or physical. Identify the following as examples as either Physical or Chemical changes . Which reactions produced a color change? Did either heating or burning produce a chemical change? That gas causes the bubbles and fizzing. Exercise 2: Heating and Combustion. Observations of Chemical and Physical Changes Hands-On Labs, Inc. Data Note: Always make as many observations as possible . observations, and type of change for each task. Well Chemical #1 (4 drops) Chemical #2 (4 drops) Observations: Chemical Change (Y/N) A1 NaHCO3 Sodium Bicarbonate HCl Hydrochloric Acid A2 NaOCl Sodium . 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. Procedure: In this experiment, various chemicals were mixed together, to determine a reaction. A gas or a solid may be formed where the products are in a different . Effect of Temperature on the Equilibrium - Also record your observations in the data table. Get a piece of copper wire from your teacher. Gently warm the second tube in a hot water bath on a hot plate. By contrast, chemical . A. 3. 10. 2-color change. Explain your answer using the observations collected in Data Table 2 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. transfer. To classify the types of chemical reactions based on observations . C.1.12 Demonstrate the principle of . Record your initial observations. Observations DATA TABLE 1 Material Observations Test tube 1: magnesium chloride . Mix well. (Be sure to make observations regarding both the solution and the zinc.) Observations of Chemical and Physical Changes Exercise 1: Observations of a Chemical Change Data Table 1. Then allow the melted wax to cool. /21 /21 : Conclusion: A new substance is being formed. Food testing lab. Heat an ice cube in a beaker. Data Tables and Observations. Add 1 mL (20 drops) of iodine solution into the test tube containing the food being tested with a pipet and observe. 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. . Without stirring, add 1 level teaspoonful of the solid to the water. Specify whether each of the following changes is physical or chemical by placing a P Heat the whole test tube until no more changes occur. /21 /21 : Follow up Questions: Correctly identifies and explains the theory relating to the experiment and supports this with accurate observations & data. When energy is released in an exothermic reaction, the temperature of the reaction mixture increases. No NaOCl + KI Observation 1: It turned brown, but . Table 15. Liquid water and ice (frozen water) are both the same substance, water. Describe the change in color for each of these reactions. Purpose: To learn how qualitative and quantitative observations of a chemical reaction are used to formulate a hypothesis. 1. Fill the 100-mL beaker about one-fourth full with distilled water. Obtain and describe a sample of copper(II) chloride dihydrate, CuCl 22H 2O. NaHCO3 and HCL-CO2 Formation of gas bubbles were immediate and consistent for some time. Observations Before: Observations After: Evidence of Chemical Reaction (Circle all that apply) 1-energy. Examine each substance with a magnifying glass. on determining if a physical or chemical change happened at your station. Define the following terms . Record observations of this solution in your data table. Record examined observations of physical appearance. Using a pipet two drops each chemical was deposited into the 24-well plate. No color change, clear. See average annual change for different time periods at the bottom of this table. Get a piece of magnesium from your . The magnet separates the iron filings . Data Collection: Visit each station and fill in the data table for each task. Students then perform 10 more chemical reactions with unknown powders (labeled A - F) and liquids (labeled 1 - 6). Make a detailed observation of the remaining substance in the test tube. They must collect data and then develop a testable question based upon all of the data collected. Pre lab Exercise: 1. Describe the dry crystals in detail and record. Students were given 4 different solid substances during an investigation on physical and chemical changes. 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. The balanced chemical reaction : 2. 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 . A color change . 7. Physical change is a change in which the substance changes form but keeps its same chemical composition (reversible). Examine the wire and note any change in its appearance caused by heating. Record observations on the data table. As you perform the experiment, record your data and observations in these tables. Observe both the crystals and the water and record. Place an evaporating dish near the base of the burner. page 1 Thermochemistry: Measuring Enthalpy Change in Chemical Reactions Experiment created by the UMaine InterChemNet Team. To remove the tarnish from the ring, students placed it in a pan lined with aluminum foil and added hot water. 1. Explain your answer using the observations collected in Data Table 2 Without stirring, add the crystals. Data Table 1 - Chemical Reactions Well Chemicals Observations Chemical Change? Information, Data, and Observations Part 1. Leave the substance in the container. A The sugar is becoming coal. Observations of Chemical Changes. There are two methods for distinguishing between exothermic and endothermic reactions. Data Table 2: Heating and Combustion Chemical Initial Observations Heating Observations Mg Zn Solid, shiny silver, flat sample less than half a cm. 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. Thank you. Lord of the Flies: Fear of the Unknown. a. Chemical Reactions. Record your observations in the data table. Procedure Copy Tables 2-1 and 2-2 into your laboratory notebook. Which reactions produced a precipitate? Melt a small amount of candle wax. Is cutting a cake into 8 pieces a chemical or a physical change? Record your observations of the crystals and the inside of the test tube while heating it. I. Lab # 6: Physical and Chemical Changes 7 PRESTUDY 1. Part A: Making Observations in the Laboratory Observations - describe what happened Did a chemical reaction occur? Write the chemical equation for the ionic reaction between Na S and AgNO. System Observations Sucrose, C12H22O11-heated NaHCO3-reacted with 6M HCl Fe and S mixture-heated-initial mass-final mass ANALYSIS AND CONCLUSIONS: The following is a list of changes you observed in Parts B and C. Indicate whether each change was a physical change or a chemical change and give evidence for your answer. Add the zinc to the test tube. 2. Describe the similarities and/or differences between heating and burning the magnesium metal. 1. Chemical Reactions. Note the appearance of the wire. *If you fold a piece of paper it is a physical change. 2) To decide if an observed change is physical or chemical. 2 3 B I U 3 2 3 -2 2. The composition of the matter changes and the new kinds of matter have different properties from the old matter. C The acid is turning into a base. The chemical mixtures are noted below in the Data Tables. 2. Be detailed in your observations. Include one photograph from the chemical reaction tests in Data Table 1, one photograph of the food/starch test, and one photograph of the household chemical test. NaHCO3 + HCl Nothing occurred it remained the same. Effective data management plays a key role in oceanographic research as cruise-based data, collected from different laboratories and expeditions, are commonly compiled to investigate regional to global oceanographic processes. 300 seconds. Put two pieces of magnesium ribbon on the paper labeled "Magnesium". Note: Indices are relative to Alabama in 1996 = 1. That gas causes the bubbles and fizzing. Table 1: Chemical Reaction Recorded Data Record reaction changes; temperature changes, mass changes, phase changes, etc. In a physical change, one or more physical properties of a substance are altered.