Lab 1 on Ph Levels free essay sample

Section 1: You will be testing 4 known solutions for pH levels using a standard wide-range indicator. Based off of the results obtained in the lab room, fill in the following table: 1. How many drops of wide range indicator will you use for each test, based on industry standards such as the LaMotte field test? 10 drops of indicator solution. |Solution Number |pH from Lab |Acid or Base? Solution Name (from Lab results) | |Solution 1 |6 | |Water | |Solution 2 |2 | |Lemon Juice | |Solution 3 |12 | |Bleach | |Solution 4 |5 | |Coffee | Section 2: Now that you understand how to read pH measurements, go out into the field to gather pH samples from 3 different lakes to take back to the lab for testing, and answer the following question: 2. What was the pH level measured at Lake 1? 6 3. What was the pH level measured at Lake 2? 4 4. What was the pH level measured at Lake 3? 5 5. Which two lakes have the highest levels of acidity in their water? Lake 2 and lake 3. We will write a custom essay sample on Lab 1 on Ph Levels or any similar topic specifically for you Do Not WasteYour Time HIRE WRITER Only 13.90 / page 6. Based off of the information gathered at each lake, explain why your results may have turned out this way. Perhaps the pollution from lake one went down stream to the other two lakes, leaving lake 1 to seem more of a base solution. Part II: For the following questions, provide your response in short-answer format (2–3 sentences each). Use this Phase’s activities and resources to assist you in answering. 7. What is pH? 8. What is a base? A base is a solution that has a reading of higher than 7 on the pH scale. Examples include hard water, human blood, and soap. 9. What is an acid? An acid is a solution that has a reading of lower than 7 on the pH scale. Examples include soft water, Hydrochloric acid, and soda. 10. What does it mean if a solution has more hydrogen ions (H+)? Then the solution is acidic. 11. What does it mean if a solution has more hydroxide ions (OH-)? Then the solution is a base. 12. What does it mean if a solution is neutral? The hydrogen ions and the hydroxide ions are balanced. 13. Explain the pH scale and how it is used to indicate acidic, alkaline, and neutral solutions. The pH scale is labeled from 0 to 14. Less than 7 is deemed to be the most acidic, 7 deemed neutral, and more than 7 deemed a base. 14. What does it mean in terms of strength when the pH of an acid changes from 5 to 4? The solution has become 10 times more acidic.