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Does storage temperature affect orange juice acidity
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Transcript
Does storage temperature affect orange juice acidity.
PROBLEM
If orange juice sits unrefrigerated does it lose it’s acidity?
HYPOTHESIS
If I take my orange juice out of the refrigerator, how long will it take to gain its acidity?
PURPOSE
The purpose of my project is to find out...How long it will take orange juice to lose its acidity when sitting out unrefrigerated.
RESULTS
In my results, I found that there was not a significant change in the acidity when it was sitting on the counter or in the refrigerator.
reseach
INDEPENDENT VARIABLES
The temperature of the area the orange is placed.
DEPENDENT VARIABLE
The thing that you record that changes as a result of the independent variable changing is: The acidity of the orange juice the longer it sits out.
materials
- pH paper
- Orange juice
- Thermometer
- Refrigerator
- 6 Cups
Conclusion
PROCEDURES
1. Before you start, pour ⅓ cup of orange juice into two cups.
2. Put the pH paper into the cup.
3. Document the number of the ph stick
4. Record this on paper.
In my conclusion, I noticed that there wasn't a huge difference in the acidic change in the orange juice that sat out versus the orange juice that sat on the counter. I noticed that their number changed by only a few points, nothing huge.
The orange that sat out seemed to have the higher acidic numbers, and the juice that sat in the refrigerator numbers were lower. The cool temperatures basically kept the pH number of the orange juice steady. So,my Hypothesis wa right when i said the orange juice acidity would increase if left out of the refrigerator.
CONTROLLED VARIABLES
I will use the same orange juice a and the containers will not change.
5. Pour ⅓ cup of orange juice into your second cup and check the pH..
6. Leave a ⅓ cup of juice sitting out on a counter for one day and put the other cup in the refrigerator for one day.
7. Adjust temperature to 40-50 degrees.
8. Leave the orange juice in for one day.
9. Take the orange juice out of the fridge and put the pH paper into the juice and check pH, do the same thing to the cup on the counter..
10. Depending on what color the pH paper is the juice should either be very acidic, acidic, balanced or .too alkaline
11. Make sure to record the exact color the pH color and number, describe it in detail.
12. Repeat my experiment 2 more times..
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