Loading presentation...

Present Remotely

Send the link below via email or IM

Copy

Present to your audience

Start remote presentation

  • Invited audience members will follow you as you navigate and present
  • People invited to a presentation do not need a Prezi account
  • This link expires 10 minutes after you close the presentation
  • A maximum of 30 users can follow your presentation
  • Learn more about this feature in our knowledge base article

Do you really want to delete this prezi?

Neither you, nor the coeditors you shared it with will be able to recover it again.

DeleteCancel

Make your likes visible on Facebook?

Connect your Facebook account to Prezi and let your likes appear on your timeline.
You can change this under Settings & Account at any time.

No, thanks

Effects on pH Level By Temperature

No description
by

Doseon Kim

on 17 December 2013

Comments (0)

Please log in to add your comment.

Report abuse

Transcript of Effects on pH Level By Temperature

Procedure
1. Pour half a cup of orange juice in a cup and put in room temperature Measure the temperature of the room and the pH after 1 day.
2. Do the same thing as step 1, but put another cup in cold temperature and measure the temperature.
3. Do the same thing as step 1, but put the cup of orange juice in hot temperature and measure the temperature.
4. Write down the pH and observations.
Effects on pH Level By Temperature

Background Research
The pH is the measure of acidity or hydrogen. The scale is from 0-14(0-6.9 is acidic, 7.1-14 is basic, and 7 is neutral.) When temperature increases, the hydrogen ion concentration increases too which means the pH decreases.
Hypothesis
I know that when the hydrogen ion concentration increases, then the pH decreases, I think that if I increase the temperature or the storage temperature of the orange juice, then the pH or the acidity will decrease, because of the fact that when the hydrogen ion concentration increases and hydrogen increases from temperature.
Variables
Independent Variable:
The temperature of the orange juice.

Dependent Variable:
The pH of the orange juice.

Controlled Variable:
Orange juice in room temperature.
Materials
-Orange juice (Half a cup)
-pH paper
-Cups
-Different room temperatures
-Thermometer
Purpose
Does different storage temperatures affect orange juice's acidity?

My purpose for this project is to figure out if temperature can have an effect on pH level.

By Doseon Kim #406
Bibliography
"Definition" Encyclopedia of Global Warming Ed. Steven I. Dutch. Salem Press, Inc. 2009 eNotes.com 29 Oct, 2013 http://www.enotes.com/topics/ph/reference#reference-ph-2-definition

Schweb, W. (8, 2007) Retrieved from October 29, 2013
http://www.epa.gov/acidrain/measure/ph.html

epa.gov (December 4, 2012) Retrieved from October 29, 2013
http://www.epa.gov/acidrain/measure/ph.html

zolandeducation Retrieved from October 29, 2013
http://goo.gl/GJcTl

Observations
The orange juice looked a little milky for the hot and room temperature.
The pH paper for the hot temperature was like a very light orange.
The pH paper for the room temperature was sort of dark in some spots, but light in tips.
The pH paper for the cold temperature was like a regular orange color .
For the hot and room temperatures, the orange juice made the plastic cups wet and thinner, but the cups in cold temperautre was the same.
Pictures
Hot temperature
Cold temperature
Warm Temperature
Hot Temperature
Cold Temperature
Warm Temperature
Chart
Trials
Room Temp
68 Degrees
Hot Temp
75 Degrees
Cold Temp
55 Degrees
Trial 1 pH
Trial 2
Trial 3
Average
pH
pH
pH
5
6
5
5.3
5.5
6
4
5.1
6
5
6
5.6
pH level of orange juice in different Temp
Temperatures of the orange juice
pH level of Orange juice
Room Temp (68)
Hot Temp (80)
Cold Temp (55)
0
2
4
6
5
3
1
Conclusion
I predcited that if i increased the temperature, then I thought the pH of the roange juice will decrease. My independent variable was the temperature of the orange, the dependent variable was the pH of the orange juice, and my controlled variable was the orange juice in room tempature since that's the opposite of hot and cold temperature. My constants waas the brand of orange juice I was using.




1/3
Conclusion
According to my project which was to find out how temperature affects the pH of orange juice, the thing that I noticed was that the pH of the cold temperature's pH was higher by .5 than the others. And the average proved that the cold temperature's pH was higher by around .4 pH.


2/3
Conclusion
This means that I was correct about my hypothesis that if I increase the temperature than the pH will decrease. This is saying if you store orange juice in cold temperature than the pH will slightly decrease. A possible error that might have slightly change my results would be that I didn't cover the plastic cups tightly. So next time if I were to do this again, I would seal the cups tightly so that no molecules escapes to change the pH

3/3

No Safety Precautions Unless if Allergic to Orange Juic
Full transcript