Lab Guide for Lab # 1 (Semester 2, Quarter 3) Topic: Chemical Weathering Process Suggested Title of the Lab: The Case of the Disappearing Statue Overview: To demonstrate the effects of solutions with low pH levels to structures Background Information: Chalk is a type of limestone made of the shells of microscopic organisms. In this lab, we will use chalk to simulate the factors that affect chemical weathering. The three factors we will investigate will be acidity, surface area and temperature. Scientific Problem: 1. What will be the effect of the acid to your statue? 2. What are the possible by – products after the acid reacts with the chalk? Materials: List down all the materials that you have used in this lab. Procedure: 1. Obtain your materials from your teacher by group 2. Use the toothpicks to carve a figure on your chalk. Be creative! You can make a statue of yourself, Optimus Prime, Statue of Liberty – it’s up to you! 3. One you are done, lay your statue in the provided plate. 4. Observe the texture of your statue. Write down your observation in the table below. 5. With the help of a medicine dropper, add 5 – 10 drops of vinegar all over your chalk statue. 6. Observe what happens and write down what you see in the observation table below. 7. Add 5 – 10 more drops then observe, Data Table: Direction: Write down your observation/s of your statue’s physical features such as color, texture, etc. before and after you dropped vinegar to your “statues”: Before After Observation and Results: 1. Describe what happened to your “statue” after the first 10 drops of vinegar. _________________________________________________________________________________________________________________
_________________________________________________________________________________________________________________ 2. Explain what happened in the statue below: (Note: These are same statues, picture taken 10 years apart). Also, explain what type of weathering happened here.