Using common substances makes the lesson more engaging and keeps cost low since the materials come from the cupboard or the dollar store. As students read I stop them to add in tidbits related to what we already learned in the lab, to point out the information that can be gathered from the model, and to have them highlight important information.
The other source of error could have been contamination or not holding the electrodes up completely. I then highlight the fact that we will be looking at some common solutions found in the human body and understand if they are considered electrolytes or non-electrolytes. Rather I give them points for having their data table complete and answering each of the questions.
This BBC site has information about the types of bonds. The lab is worth 19 points with the table worth 8 points 1 point for data from each stationthe questions worth 2 points each, and the conclusion worth 3 points This particular student missed one point on question 4, "Explain why electrolytes are essential to the human body," because she did not use the examples in the introduction that we had discussed.
Her source of error dealt with the conductivity tester which was very common for students.
See the reflection attached on Popcorn reading. Hands-on testing Before doing any hands-on testing, be sure to have your students put on appropriate personal protective equipment PPEincluding goggles, apron, and gloves.
Living By Chemistry is a great book that often leads students into understanding concepts using inquiry and real-world examples. Properties of Ionic and Covalent Substances Substance. I then hold up the ionic model I have in my classroom and reiterate how each cation is surrounded by anions and each anion is surrounded by cations.
This is a lab which I do not grade with a rubric. Ionic, Covalent, and Metallic, I have them perform a reading where they explore models of the three types of bonds. To record their results, students can complete a data table similar to the one below as they perform the tests.
I have students first read about the types of bonds, and then read through and answer questions about the bonds. To learn more about this great resource visit their website.
When students are done with the quiz I have them turn in. I also stress to students that they are only writing down a few of the important aspects of the solution on their papers.
I have students read using the technique of Popcorn Reading.
CFA Unit 3 Quiz. Many students need to take the evening to complete the answers so they turn in the following day. This was a common missed problem along with the differences in electronegativity values question. This allows me to give hints to students concerning the questions, as in these examples: Both of these are further addressed later in the unit.
This student missed the question related to melting points. Properties of Ionic and Covalent Bonds By Susan Lustig Carolina Teaching Partner Chemical bonding is one of the fundamentals of a chemistry course and the framework for many chemistry concepts, including solubility, melting point, and formula writing.
However, while students are able to define covalent bonding sharing of electrons and ionic bonding transfer of electrons almost by rote, they often have difficulty remembering the properties of these bonds and the explanations for them.
The properties that students will test for are solubility in water, melting point, and electrical conductivity in solid and liquid phases. To begin the lab I pass out the lab to students and have them read the introduction to themselves.
Elaborate 60 minutes In this section students perform a lab to understand how electrolytes are involved in the human body. For this lab I have students work in their table groups without assigning specfic roles, but do tell them to make sure that they are taking turns testing the substances.
This video shows how I explain the lab to students. If you want to perform a similar activity you can have students read about the types of models and then ask questions to compare them.Essay about Lab Ionic And Covalent BondsObjectivesUnderstand The Lab: Ionic and Covalent Bonds Objectives • Understand the differences between ionic and covalent bonds.
• Connect ionic and covalent bonds with physical properties of matter. Distinguishing Between Ionic and Covalent Compounds Lab Purpose: Use physical properties to distinguish between ionic and molecular compounds.
Lab Ionic and Covalent Bonds Introduc/on Have you ever accidentally used salt instead of sug-ar? Drinking tea that has been sweetened with salt or ea ng vegeta. Dec 14, · Ionic vs.
Covalent Bonding Lab Report Intro: Most atoms are never found by themselves; instead they are bonded to other atoms through an ionic or covalent bond because the atoms need to form an octet to become stable.1/5(1). 1 NAME: _____ Properties of Ionic and Covalent Substances Lab Introduction: Atoms will forms bonds with other atoms in an attempt to obtain a stable valence electron shell.
About the Ionic and Covalent Bonds Virtual Lab Simulation Have you ever wondered how atoms are held together? In this simulation, you will learn the basics about atomic bonding in ionic and covalent compounds, and how to distinguish those compounds experimentally.4/4().Download