CHM 1020 Florida International University Chemistry Lab Report

SwamyFlorida International University
CHM 1020L
Introduction to pH lab
This lab uses the pH Scale Basics simulation from PhET Interactive Simulations at University of
Colorado Boulder, under the CC-BY 4.0 license.
https://phet.colorado.edu/sims/html/ph-scale-basics/latest/ph-scale-basics_en.html
Learning objectives
1) Understand the pH scale
2) Relate the value of pH of a substance to whether a given solution is acidic or basic.
3) Predict the effect of volume on pH of pure substances
4) Predict the effect of dilution on pH of pure substances
5) Organize a given list of substances from most acidic to most basic with supporting
evidence.
6) Apply knowledge gained in the experiment to explain relevant real world situations.
Pre-lab
Cite your sources for each answer at the very end of the document – a video/ a website etc.
1) What is the pH of distilled water generally and why is it that particular pH?
2) What is the pH range for an acidic solution? Which is higher in concentration: H + ions or
OH- ions?
3) What is the pH range for a basic solution? Which is higher in concentration: H+ ions or
OH- ions?
4) What is the pH of blood? What happens if the pH of blood changes?
Swamy
Florida International University
5) What conditions can cause a change in the pH of blood? List 2 conditions that cause the
pH of blood to increase and 2 conditions that cause the pH of blood to decrease. Explain
briefly why these conditions cause the pH of blood to increase or decrease and what we
can do to avoid them.
6) In the experiment what precautions must be taken to ensure that your pH probe gives
you the correct reading?
Swamy
Florida International University
Observations
Table 1
pH of pure solution and nature of the solution (acidic/basic/neutral)
Identity of
liquid
(pure
solution)
Drain
cleaner
pH of 0.30 L of pure
solution and nature of
solution
13.00
basic
pH of 0.50 L of pure
solution and nature of
solution
pH of 1.00 L of pure
solution and nature of
the solution
13.00
basic
Swamy
Florida International University
Table 2
pH of pure solution and diluted solution and the nature of the solution (acidic/basic/neutral)
Identity of
liquid
(pure
solution)
pH of 0.50 L of pure
solution
(get values from
Table 1) and nature
of solution
Drain cleaner 13.00
basic
pH of 1.00 L of pure
solution
(get values from Table
1) and nature of
solution
pH of diluted mixture
(0.50L of pure solution +
0.50 L water) and nature
of solution
12.70
basic
Swamy
Florida International University
Post lab questions
1) What effect does an increase in the volume of a pure substance have on the pH (for
example does the pH of 0.30 L of the substance vary from the pH of 0.50 L of the
substance) Explain your reasoning as to why this effect is seen?
2) What effect does diluting a pure substance have on the pH? Explain your reasoning as to
why this effect is seen?
3) How will adding water affect the pH of the following solutions. Support your conclusions
with data from your experiments.
a) An acidic solution
b) A basic solution
c) A neutral solution
4) Draw 3 general conclusions about the kinds of acidic and basic substances present on
the list (for example. can you group certain kinds of substances together?)
Swamy
Florida International University
5) In general when someone is experiencing symptoms of heartburn, they suggest that the
person drink lots of water. Does that help? Explain your answer using the concepts you
learned in this lab.
6) What conclusions can you draw about the kinds of foods featured in this simulation? Is
that generally the case with most of the food we eat? Support your conclusions and cite
your sources.
7) Consider some common drinks – Gatorade, orange juice, green tea, vinegar, baking
soda.
a) Organize these foods from most basic to most acidic. Explain your reasoning (and
cite your sources)
Swamy
Florida International University
b) Among all these foods which will have the highest pH if you dilute with an equal
amount of water? Explain.
c) Among all these foods which will have the lowest pH if you dilute with an equal
amount of water? Explain.
Sources used: Cite your sources below

Don't use plagiarized sources. Get Your Custom Essay on
CHM 1020 Florida International University Chemistry Lab Report
Just from $13/Page
Order Essay
Place your order
(550 words)

Approximate price: $22

Calculate the price of your order

550 words
We'll send you the first draft for approval by September 11, 2018 at 10:52 AM
Total price:
$26
The price is based on these factors:
Academic level
Number of pages
Urgency
Basic features
  • Free title page and bibliography
  • Unlimited revisions
  • Plagiarism-free guarantee
  • Money-back guarantee
  • 24/7 support
On-demand options
  • Writer’s samples
  • Part-by-part delivery
  • Overnight delivery
  • Copies of used sources
  • Expert Proofreading
Paper format
  • 275 words per page
  • 12 pt Arial/Times New Roman
  • Double line spacing
  • Any citation style (APA, MLA, Chicago/Turabian, Harvard)

Our guarantees

Delivering a high-quality product at a reasonable price is not enough anymore.
That’s why we have developed 5 beneficial guarantees that will make your experience with our service enjoyable, easy, and safe.

Money-back guarantee

You have to be 100% sure of the quality of your product to give a money-back guarantee. This describes us perfectly. Make sure that this guarantee is totally transparent.

Read more

Zero-plagiarism guarantee

Each paper is composed from scratch, according to your instructions. It is then checked by our plagiarism-detection software. There is no gap where plagiarism could squeeze in.

Read more

Free-revision policy

Thanks to our free revisions, there is no way for you to be unsatisfied. We will work on your paper until you are completely happy with the result.

Read more

Privacy policy

Your email is safe, as we store it according to international data protection rules. Your bank details are secure, as we use only reliable payment systems.

Read more

Fair-cooperation guarantee

By sending us your money, you buy the service we provide. Check out our terms and conditions if you prefer business talks to be laid out in official language.

Read more
Live Chat+1(978) 822-0999EmailWhatsApp

Order your essay today and save 20% with the discount code LEMONADE