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Ph Perfect

Ph Perfect. By : Lizzie Bennett. Purpose. Hypothesis. The purpose of my experiment is to see what soil -Sand, Clay, or potting soil- affects water’s pH the most.

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Ph Perfect

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  1. Ph Perfect By: Lizzie Bennett

  2. Purpose Hypothesis • The purpose of my experiment is to see what soil -Sand, Clay, or potting soil- affects water’s pH the most. • My hypothesis is that the potting soil will affect the pH (percentage hydrogen) of water the most because most plants need pH to grow and potting soil is used more for plants than sand, or clay.

  3. Procedures

  4. Materials 1. 1,250 mLs of clay 2. 1,250 mLs of sand 3. 1,250 mLs of potting soil 4. Porpoise brand test strips 5. 3,750 mLs of tap water 6. metric measuring cup 7. 3 pots with drainage holes 8. a plastic spoon 9. 3 aluminum pans 10. gardening shovel 11. label maker 12. paper 13. writing tool

  5. Variables • Independent variable-The different soils • Dependent variable-The pH of the water • Constant variable-Amount of water used, and amount of soil used

  6. Directions 1. Gather Materials 2. Label pots 3. Add 250 mLs of potting soil to the pot 4. Place pot over the aluminum pan 5. Fill the measuring cup with 250 mLs of water. Check pH with pH test strips. Write it down. 6. Pour the 250 mLs of water into pot 7. Wait 5 minutes. Take pH of run off in aluminum pan with pH test strips. Write it down. 8. Repeat steps 3-7 four more times 9. Repeat steps 3-7 five times with sand instead of potting soil. 10. Repeat steps 3-7 five times with clay instead of potting soil. 11. Record Data

  7. Data BoxSoil’s Affect on water pH

  8. GraphSoil’s affect on water pH

  9. Results The results of my experiment is that clay affected the water’s pH by 1.55. While potting soil affected the water’s pH by 0.32, and sand affected water by 0.84.

  10. Conclusion My hypothesis - that the potting soil will affect the pH (percentage Hydrogen),of water the most because research says most plants need a high pH to grow, and potting soil is used for plants more than sand or clay-was incorrect. Potting soil affected water’s pH by 0.32; sand affected water’s pH by 0.84 , and clay affected water’s pH by 1.55 making clay the most acidic. During this experiment I only had one problem which was that I couldn’t find Clay anywhere. If I were to do this experiment again I would definitely use a substitute soil for clay. This experiment is helpful to mankind because if you need a soil with a high pH to plant something you can use potting soil, if you need to plant something with a low pH you can use clay, and if you need something in the middle you’d use sand. It’s helpful to know what your plants need in there base soil so you don’t waste money buying different soils.

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