HONOURABLE MENTION

pH-abulous pH

Which substance is most acidic? Which is most basic?
Omar Wissam Charanek
Grade 7

Hypothesis

I predict that the most acidic will be lemon, and the most basic/alkaline will be milk.

Research

 

  • I did some research on pH.
  • I started with the basics.
  • pH is a scale from 1 to 14.  It tells you how acidic or basic a substance is.  If it’s below 7, it’s acidic, and above 7 is basic.
  •  
  • Combining acid and base will result in a chemical reaction.
  • Example: baking soda (base), vinegar (acid).
  • Result: expansion.
  •  
  • Acidic substances have higher quantity of Hydrogen ions.  Basic substances have less Hydrogen ions.
  • pH stands for potential of Hydrogen.
  •  
  •  Terms:
  • Acidic: a compound that has low potential of hydrogen.  Not basic
  • Basic: a compound that has high potential of hydrogen.  Not acidic
  • Alkaline: Basic.  e.g. alkaline batteries = basic batteries.
  •  
  • Inspiration/ pH every day!
  • When you drink juice, cook, bake, or use substances like sugar, water, vinegar, etc. you are using pH.  Cooks should know their pH to help compose taste, as should chemists and bakers.


 


 

 

Variables

 

  • Pepsi
  • Lemon juice
  • Milk
  • Water

Procedure

Procedure

  1. Use pH meter to check substance.
  2. Record.
  3. Repeat for all substances.

Observations

Observations

  • I observed that the Pepsi was fizzy,
  • The lemon was sort of murky and cloudy,
  • The water was not pure,
  • And the milk slightly sweet.
  • The Pepsi's pH changed often.  Maybe because of the bubbles?

Analysis

 

Lemon

Pepsi

Water

Milk

Trial 1

4.97

5.08

6.73

6.34

Trial 2

5

5.38

6.72

6.72

Trial 3

5

5.03

6.74

6

All were acidic.

Conclusion

Conclusion

  • I can conclude that I was, in fact, correct.  In terms of hypothesis.  The milk was most alkaline (basic) and lemon most acidic. 

Questions?  Click here and I'll do my best to answer you!

https://forms.gle/uYLwwGK5eZzdtDNC7

Application

I dedicated at least 15 minutes a day to this project.  Once, I worked for 3 hours straight!

Sources Of Error

 

  • If I made any errors, it was probably because of the following reasons:
  • The Pepsi's changeability because of the bubbles.
  • Traces of other liquid on the pH meter.
  • Rush.
  • Stress.
  • Forgetfulness.
  • The temperature of the liquids.
  • ETC.

Citations

Citations

  • “PH Scale: Acids, Bases, PH and Buffers (Article).” Khan Academy, Khan Academy, www.khanacademy.org/science/biology/water-acids-and-bases/acids-bases-and-ph/a/acids-bases-ph-and-bufffers.
  • “Browse Royalty-Free Photos.” Explore over 300,000 Free Stock Photos and Royalty Free Images - FreeImages.com, www.freeimages.com/. 

Acknowledgement

Special Thanks To:

My mom, who pushed me to work hard.

My bro, who helped me.

Mr. Maruyama, my options teacher who helped me join CYSF.

And to you, for listening.