Identifying ionic compunds lab
For testing, many of our schools don't have the equipment but there are other great alternatives. This is really why we need to carry out more than one test on the unknown substance because some categories of compounds share similar properties for example, ionic compounds and covalent compounds both have high melting points.
From this information students will analyze their results to determine whether the compounds or mixtures are covalent or molecular compounds.
If all the groups don't do enough quality tests for determining covalent and ionic compounds, have them fill in their data in an excel worksheet for all to view on the projector.
The periodic table can help us recognize many of the compounds that are ionic: When a metal is combined with one or more nonmetals, the compound is usually ionic.
Look at the containers of: sodium chloride, potassium iodide, sucrose, benzoic acid, camphor, sodium nitrate, tap water, distilled water, 3M Hydrochloric acid and paint thinner.
How to identify cations and anions in an unknown solution
An Ionic bond is a type of chemical bond that involves a metal and a non-metal ion. However, it is not always true for example, aluminum chloride, AlCl3, is not ionic. Next, you can try to dissolve some of the substance in water or another polar solvent. The longer the time period means the higher the melting point. Procedures Each team member: In your ChemJournal write the procedure you will need to follow to test your chemicals. Water molecules are polar which means one side of the molecule is positively charged and the other side of the molecule is negatively charged. The students will write procedures for five different tests in which they will perform in which the teacher will approve of. Melting point would not be impossible without proper equipment, use a crucible and measure the amount of time it takes to melt if it does. Although pure aluminum oxide is colorless, trace amounts of iron and titanium give blue sapphire its characteristic color. The brainstorming discussions will help me direct the class into testing good quality physical properties.NOTE: make room for an extra column at the right side for "further studies". Welcome August 16, A warm welcome to all new and returning students and families for the school year! This activity will help students make connections between the two types of compounds with the Periodic Table and will help bridge in to the nomenclature of ionic and molecular compounds.
The main part of this grade will be a rubric for their data tables and their conclusions with questions. Sharon Williams - Athletic Director Ms.
Identification and properties of an unknown ionic compound lab report
Mitch White - Focus Facilitator Ms. You can often recognize ionic compounds because of their properties. List them on the white board and be prepared to explain how your team made these decisions. If necessary, give containers of paint thinner, camphor, salt to each group to help them think of physical properties to test. The key concept for students to learn in this activity is being able to determine what physical properties exist in an ionic or a molecular compound. Please explain if abbreviations are used in the data table, e. First, a sample of the unknown substance can be placed in a test tube and put over a flame. Conductivity my students have experience with conductivity during the periodic table unit.Over of these are new Raptors, and include the return of foreign exchange students with a young man from Sweden Hurrah! Although pure aluminum oxide is colorless, trace amounts of iron and titanium give blue sapphire its characteristic color.
Thus, ionic compounds are electrically neutral overall, even though they contain positive and negative ions. Covalent bonds are the attractive forces between the positively charged nuclei of the bonded atoms and one or more pairs of electrons that are located between the atoms.