Lab Report 1 Chemical Aspects: Acids, Bases and pH

User Generated

BiiiB

Science

Description

EVERYTHING IN THE FILE

Unformatted Attachment Preview

BIO 130 Professor Edwards Lab 1 Chemical Aspects: Acids, Bases and pH Assignment: Acids are molecules that release hydrogen ions (H+) when dissolved in water and increase the concentration of H+ in a solution. Bases are molecules that remove H+ from a solution and, therefore, decrease the concentration of H+ in a solution. The pH scale is used to measure the concentration of H+ in a solution (see figure below). In this exercise, you will measure the pH of several different liquids. You will need to refer to information below, which has instructions for this lab and explains how to prepare your WORD document Lab Report that you will be placing in your Desire to Learn “Dropbox” for it to be graded. (Reminder Labs are due in your Dropbox by due date listed in that particular Labs Dropbox and cannot be turned in late. No excuses will be accepted for not uploading your lab by due date and if not turned in by time given a zero grade will be given for that particular lab.) This lab will be performed using bleach, which could be a hazard to your eyes, skin, respiratory system and clothes, so you must read and follow safety suggestions on the bleach label and have the appropriate rubber cleaning gloves, clothing, eye protection and shoes for its use. Use bleach in a well ventilated area as fumes can be irritating to your respiratory system. All liquids could be safely disposed of in your sewer system once lab is complete. Instructions: 1. Obtain and label 7 small cups with the solutions listed in Table 1. Fill the cup about 1/3 full of the appropriate solution. 2. Measure the pH of these solutions by dipping the colored end of the pH test strip into the solution. Remove the test strip and compare the colors on the test strip with the colors on the test strip package to determine the pH of the solution; record your results in Data Table 1. Materials: 1. pH strips (Can be purchased from campus bookstore) 2. 7 Cups 3. Rubber gloves 4. Safety glasses or goggles (Can be purchased at campus bookstore or hardware store) 5. Solutions listed below in Table 1 Methods: Prior to conducting experiment, determine the question that you are asking (why are you doing this experiment, what are you hoping to discover?) and state a hypothesis. These will be entered in “Question” and “Hypothesis” directly below prior to conducting the experiment. Question: 1 Hypothesis: Data Table 1. pH of Tested Solutions Solution Vinegar Tap Water Stream or Ocean Water Soda Bleach Rain water or water from a puddle Liquid Soap pH Your lab report must include the following sections: Introduction, Materials and Methods, Results and Discussion. Divide your report into sections and use the headers “Introduction, Materials and Methods, Results and Discussion”. Introduction: In this section, you need to provide some background information on Acids, bases and pH (i.e. what are they and why is it important to the environment– you can use your textbook as a resource, but make certain to CITE IT) and then explain to the reader why this particular study was conducted (i.e. what question did you want to answer with this study). You should provide a BRIEF (ONE SENTENCE) summary of what you did during the experiment (“we surveyed 7 solutions for pH to understand their relationship with the environment”) and then STATE YOUR HYPOTHESIS for the experiment. Materials and Methods: In this section you only need to state “A list of materials used and a sentence stating “data was collected as described in the lab handout”; one sentence only. You will not get full credit for the lab report if you describe all the methods in the lab handout in detail!!! Results: Create a table just like the one in the lab handout in Microsoft Word and enter your numbers for pH of the 7 solutions. If you have questions about how to make tables PLEASE contact your instructor. You also need to describe your results, for example “the solution with the lowest pH was X or acidic and the solution with the highest pH was Y or basic”. You don’t explain why or how here, just DESCRIBE what you found. You MUST have a description in words in addition to your table with data. Discussion: In the discussion section you explain your results and determine if your hypothesis was accepted or rejected. Do not alter your initial hypothesis even if it ends up being rejected – the point is that you asked a question, gathered data relevant to that question and then analyzed the data; your data and conclusions are valid whether or not you accept or reject your hypothesis. You also need to address the following questions in your discussion: 2 - Why is pH important to the environment (what could cause pH to be high or low)? What is the biological importance of what you observed? Would you expect acids or bases to be more of an issue to the environment (typically which of the two do we as humans release into the environment or contribute to (hint acid rain)? - What other factors do you need to consider when dealing with pH and our environment)? Finally, based on your data, you need to explain the pH of each solution and state if it is an acid or base. In total the lab report should be at least 3 pages in length and you will likely need to use your textbook as a reference, so you need a works cited page (not part of the 3 pages) and citations in the lab report. You may certainly use additional sources if you wish; they MUST BE CITED. We will be looking carefully for plagiarism – don’t do it!! If you have questions about the lab report ask your instructor!!! 3
Purchase answer to see full attachment
User generated content is uploaded by users for the purposes of learning and should be used following Studypool's honor code & terms of service.

Explanation & Answer

Hi, your assignment is completely done, plagiarism has been check already and you have nothing to be worried okay. If you have some questions, please do message me :).

1

Lab Report 1
Chemical Aspects: Acids, Bases and pH
Student's name
Professor
Course
Date

2

Introduction
Acid is molecule or ion capable of donating a hydro, a proton or hydrogen ion H+, on the
other hand, is a molecule or ion that can accept a proton or hydrogen ion H+. The measure that
determines the concentration of hydrogen ion is called the pH(potential of Hydrogen). Water
soluble substance with pH below 7 is considered acidic or basic if pH level is more than 7. If pH
level measures a 7, the substance is considered neutral.
So why is it important to understand the impact of acid and bases to our environment?
Like any other...


Anonymous
I was stuck on this subject and a friend recommended Studypool. I'm so glad I checked it out!

Studypool
4.7
Trustpilot
4.5
Sitejabber
4.4

Similar Content

Related Tags