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Effects on pH Level By Temperature
Transcript of Effects on pH Level By Temperature
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
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.
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.
The temperature of the orange juice.
The pH of the orange juice.
Orange juice in room temperature.
-Orange juice (Half a cup)
-Different room temperatures
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
"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
epa.gov (December 4, 2012) Retrieved from October 29, 2013
zolandeducation Retrieved from October 29, 2013
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.
Trial 1 pH
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)
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.
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.
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
No Safety Precautions Unless if Allergic to Orange Juic