Does Temperature or Concentration Affect pH?

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Updated on Apr 10, 2013

pH is the way to measure how acidic or basic a solution is. The scale ranges from 0-14, with 0 being the most acidic and 14 being the most basic. 7 is neutral -- it is neither basic nor acidic and stands for distilled water.In this experiment, we'll explore how temperative and concentration affect the pH of lemon juce and milk.

Problem:

In this experiment, we will discover whether factors such as temperature and concentration affect the pH of a solution. We will be testing one acidic solution (pure lemon juice) and one basic solution (milk).

Materials:

• Pure lemon juice
• Milk
• Microwave oven
• Refrigerator
• Containers or beakers (About 12)
• Water
• Measuring cup
• Stirring stick
• pH paper
• thermometer
• Anti-heat gloves

Procedure

1. Pour equal amounts of lemon juice into each beaker (about ½ full). Do the same for the milk.
2. Take the pH color and numerical value. As well as the room temperature.
3. Take one of the beakers that is filled with lemon juice and add water until the beaker is ¾ full. Stir.
4. Take another beaker that is filled with lemon juice and add water until the beaker is full. Stir.
5. Take the pH color and numerical value of both. Note any changes!
6. Repeat the above steps for the milk.
7. With gloves, carefully take the beaker out and dip a piece of pH paper inside and take the pH. Also take the temperature.
8. Take another beaker of pure lemon juice and put it in the refrigerator for 2 hours.
9. Dip a piece of pH paper inside and take the pH as well as the temperature.
10. Repeat the above steps for the milk and note any changes.

References:

Sofia PC is currently a college student with a deep interest in science who is aspiring to become a writer. She writes about all sorts of things across all subjects including, but not limited to; science, crafts, and fashion. She hopes to become a good writer so she can share her thoughts and experiences with the world and future generations.