QPOE Model

This journal is for lab notes ONLY and remains in the classroom! You need an ink pen! And a lab journal. This journal is for lab notes ONLY and remains in the classroom!

Properties of Metals Lab Title – center of page On each new page related to this lab write PML

Question: What are the general physical and chemical properties of metals?

Knowledge Probe: Research the following terms/questions. Restate the question being asked in your answer and provide the answer using complete sentences in your journal. Each entry must include a citation of where the information was located – be sure it is a trust worthy and reliable site. Define physical properties and include examples. Define chemical properties and include examples. Describe the observations/changes that will signify that a chemical change has occurred. Define luster. Define malleable and ductile. Be sure to discuss how these terms are similar and different. Define brittle. Define conductive. Describe the two things that can be conducted. What does oxidation do to the surface of a metal? How can the oxidation be removed? Got here 2nd hour

Prediction/Hypothesis If a number of metal samples are tested, then the properties of metals can be generalized from the actions of the samples analyzed. Got here 1st hour

Investigation Plan Observe the appearance each sample. Color, texture, luster, malleability, ductility, brittleness Run a magnet under each sample. Test the conductivity of each sample. Place a small amount of each sample into a cell well, add water to each. Remove the samples from water and dry. Test each sample with hydrochloric acid. Use envelop sample Use jar sample

Observations Table 1: Observations of physical and chemical properties of seven random metals. Metal Appearance Magnetism Conductivity Water Acid Color: Texture: Luster: Malleability: Ductility: Brittleness: Immediate effect and also appearance after 5 minutes.

Data Analysis Summarize the results of each property, include a percentage, show your work for this. Describe the common color. Describe the general texture. Describe the general luster Describe the general malleability. Describe the general ductility. Describe the general brittleness Describe the general magnetism. Describe the general effect of water. Describe the general effect of acid. Obtain data from other lab stations. Discuss the similarities and difference between your data and theirs. Research the physical properties of metals. Find two reliable sources, cite them. Discuss the similarities and differences between your data and what you found online.

Explanation Explain your findings in a well written paragraph, past tense and third person. First sentence should be your claim: The physical and chemical properties of metals include… Next sentence(s) should provide your evidence. As shown in Table 1, then summarize those observations. The next few sentences are your reasoning for why/how you developed your claim. Since 100% of the metals were lustrous, it was presumed to be a physical property of all metals. Since none of the metals reacted with water, it was concluded the metals do not chemically react with water. Include information from your secondary sources. How does their data support or contradict your results.

Evaluation Answer the following questions in complete sentences restating the question being asked. This may be written in a paragraph Describe the sources of error. Describe what you would do differently next time. Provide advise for future experimenters. Based on the confidence chart in the lab, explain the level of confidence you have in your findings. Tell me what surprised you. Based on the new knowledge you have obtained, what would you like to investigation in the lab now?

Application What is the effect of sampling size on results?