pH of Household Items

Matt Rand & Lauren Sullivan

Acidic Solution

An acid solution is a compound that when dissolved in H2O will produce a H+ ion. A substance with a pH of less than 7.

If the concentration of H+ is added to an aqueous solution then the acid will increase.

Basic Solution

A base is a compound that when dissolved in H2O will produce a OH- ion. A substance with a pH of greater than 7.

If the concentration of OH- is added to an aqueous solution then the base will increase.

Neutral Solution

Neutral substances have a pH value equal to 7. They are neither acidic nor basic.

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Explanation of Lab

We tested the pH of household items by placing the solution on the pH paper and waiting to see what color the litmus paper changed to. Once it has changed colors, compare the new color to the pH color chart.

Materials Required

  • pH test paper (6 strips)

  • pH Color chart

  • 30 Small cups

  • 30 Paper towels

  • Pen

  • Scissors

  • 10 Plastic bags

  • Camera
  • Measuring spoons (teaspoon)
  • 1 to 2 ounces of the following liquids:

    • Lemon Water

    • Hot Sauce

    • Lemon Juice

    • Butter

    • Milk

    • Pepper in Vinegar

    • Water

    • Lysol - Toilet Bowl Cleaner

    • Glass Cleaner

    • Lysol - Disinfectant Spray

    • Egg White

    • Egg Yolk

Procedure of Experimental Methods

1. Get out all of the household items that will be tested.

2. Label each paper towel to the name of the household item tested.

3. Label each paper cup to the name of the liquid substances tested.

4. And if any household items are not a liquid then, use the plastic bag. By taking the household item and placing it in the plastic bag, zip it up, and use your hand to crush the household item and add 1 teaspoon of water until it becomes an aqueous solution.

5. Once you have all aqueous solutions, take 1 teaspoon and pour the solution into the corresponding paper cup.

6. Take out the 6 pH testing papers and cut each strip into fourths.

7. Dip one new, unused pH paper into the solution in the paper cup.

8. After dipped into the liquid substance, lay the pH paper on the corresponding paper towel and let it dry for 10 seconds.

9. Compare the pH-tested paper to the pH color chart. By comparing each pH value 1-12 to see which color is the most similar.

10. Then record the results in the data table called “Real pH Value”.

11. After finding the pH number value write down in the next column if it is an acid, base, or neutral. Very acidic(reds and oranges), acidic(yellows), neutral(green), basic(light blue), and very basic(dark blue and purple).

12. Repeat steps 7-12 for every household item tested. (The only thing that should be changed through the experiment is the liquid substance tested.)

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