Identify different types of reactions chemistry lab

Anonymous
timer Asked: Dec 29th, 2017
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Question description

  • Identify different types of reactions
  • Predict the products of reactions
  • Balance chemical equations
  • Demonstrate safety precautions while performing experimental procedures

more info in the documents below there is also an anwser sheet!

Unit 5.12 Portfolio: Classifying Reactions Directions Safety Reminder: Wear safety glasses for all experiments. Objectives 1. Identify different types of chemical reactions as synthesis, decomposition, single replacement, or double replacement. 2. Predict the products of reactions. 3. Understand and balance chemical reactions. Overall Directions:  There are 4 different activities. For each activity choose to follow the virtual or real life directions when the option is available.  The answer sheet is separate. At the conclusion of each test, complete the table for that part BEFORE moving on to the next test. Part #1: Reaction Between Iron and Oxygen Materials: 2 small glass jars, cups, or bowls steel wool, water, vinegar, salt tweezers, scissors, stopwatch/timer, graduated cylinder (from science kit) Virtual Procedure: A. Click on this link and watch the reaction of iron rusting.  NOTE: the video shows a different experiment that is faster than the one below, but you will be able to see what happens in order to record your observations. B. Complete the table for part #1 on the answer sheet. Real Life Procedure: 1) Cut a small piece of steel wool about the size of a quarter and place in one of the glass containers. a. NOTE: avoid using steel wool coated with soap or cleaning agents of any kind. The experiment will fail with this type of steel wool. 2) Pour just enough vinegar in the container to cover the steel wool. a. The vinegar is to remove the protective coating that may be on the steel wool commonly used for scrubbing dishes. 3) Let the vinegar and steel wool sit undisturbed for 5-10 minutes. Then pour off the excess vinegar in the sink. 4) In the 2nd glass container (the one that is empty and unused) add 40mL of water. Then add ½ tablespoon of salt to the water. Carefully swirl the mixture until all the salt is dissolved. a. If the salt is not dissolving, then add a little more water until all the salt dissolves. 5) Remove the steel wool from the first container and add it to the salt water mixture. Let this container sit undisturbed for 30 minutes to 1 hour. a. Rust should start forming within 20 minutes. If nothing is happening, then try pouring off a little saltwater so the top of the steel wool is in the open air and the bottom of the steel wool is in the salt water. If nothing is happening after another 1 hour, then something else is going on with the reaction causing it to not work or go too slowly; watch the video. 6) CLEANUP: Once rust has formed (or nothing has happened after several hours), pour the liquid down the sink. The steel wool can be rinsed and used for cleaning dishes or toss the used steel wool in the recycling/trash. 7) Complete the table for part #1 on the answer sheet. Part #2: Reaction Between Hydrogen Peroxide and a Potato Materials: potato, hydrogen peroxide knife graduated cylinder (from science kit) Virtual Procedure: A. Click on this link and watch the reaction of hydrogen peroxide and the catalase in the potato. B. Complete the table for part #2 on the answer sheet. Real Life Procedure: 1) Make sure a parent or another adult is standing by watching. Carefully cut a small cube out of the potato. The cube should be small enough to fit in the 100mL graduated cylinder that came in the science kit. 2) Pour enough hydrogen peroxide into the graduated cylinder to cover the potato. Then add 5mL more of hydrogen peroxide. 3) Watch the reaction and complete the table for part #2 on the answer sheet. a. Visible signs of a reaction should happen immediately or within 5 minutes. If no visible signs occur, then watch the video because the potato or hydrogen peroxide is probably too old to react. CLEANUP: Pour the hydrogen peroxide down the sink and run the water for at least 5 seconds. Toss the used potato in the trash. Part #3: Reaction of Zinc and Hydrochloric Acid Virtual Procedure: A. Click on this link and watch the reaction of zinc and hydrochloric acid. B. Complete the table for part #3 on the answer sheet. Real Life Procedure: There is a test (identified in the original lesson directions) involving a penny made after 1982, but it will not be a complete reaction in the time frame needed to complete this portfolio because vinegar is too weak of an acid. If you want to try the experiment anyway, then refer to the direction sheet in the lesson. Part #4: Reaction Between Baking Soda and Vinegar Materials: baking soda (sodium bicarbonate), vinegar (acetic acid) graduated cylinder (from science kit) measuring spoons, measuring cups 1 drinking container large enough to hold ¾ cup of liquid Virtual Procedure: A. Click on this link and watch the reaction of sodium bicarbonate (baking soda) and acetic acid (vinegar). B. Complete the table for part #4 on the answer sheet. Real Life Procedure: 1) CAUTION: do this experiment in the sink, bathtub, or outside to catch the mess. a. The reaction happens fast so bring all materials to the sink, bathtub, or outside area BEFORE starting. 2) Place the 100mL graduated cylinder in the center of the sink or bathtub. a. If outside: make sure graduated cylinder can stand on its own and will not tip over. 3) In the drinking container, add ½ cup of vinegar and ¼ cup of warm water. 4) Add 2 tablespoons of baking soda to the 100mL graduated cylinder. 5) Carefully, but quickly, pour the vinegar/water mixture into the graduated cylinder. 4) Observe the reaction and complete the table for part #4 on the answer sheet. 6) CLEANUP: all materials can be washed down the sink or bathtub. a. If outside: then spray water over the test area with a garden hose or pour a pitcher of water over the area.
Unit 5.12 Portfolio: Classifying Reactions – Answer Sheet Part # 1 Visible Signs of a Reaction Observations Balance the equation for the reaction between steel wool and oxygen. Fe 2 + O2  Fe2O3 Balance the equation for the reaction of hydrogen peroxide in the presence of catalase.  H2O2 3 Type of Reaction H2O + O2 Balance the equation for the reaction between zinc and hydrochloric acid. Zn +  HCl ZnCl2 + H2 Hint: there are two. 4 Balance the equations below for the reaction of acetic acid and sodium bicarbonate NaHCO3 + HC2H3O2 H2CO3 NaHCO3 +  HC2H3O2   H2O NaC2H3O2 + + H2CO3 CO2 NaC2H3O2 + H2O + CO2

Tutor Answer

AnthonyJM
School: New York University

Hello,here are the answer,please tell me if you have some issue or want something else. 😁

Concepts
Types of chemical reactions: synthesis, decomposition, single replacement, or double replacement.
Balance of chemical reaction


Part
#

Observations

Visible Signs Type of
of a Reaction Reaction

1

The reaction between the iron and the
oxygen creates iron oxide. The ion Fe
was oxidized into Fe+3 while the Oxyg...

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Review

Anonymous
Totally impressed with results!! :-)

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