List some common liquids that you think are acidic or basic.
Part 1
1. List some common liquids that you think are acidic or basic. For example, do you think orange juice is acid or base? Why do you think each liquid is an acid or base? A. orange juice is (Acid or base) and (Why do you think so?) b. #2 is (Acid or base) and (Why do you think so?) c. etc. d. . e. . Lemon-Acidic this is because of low pH.
Orange juice- basic
2. Do you think the amount of the liquid changes how acidic or basic it is? Explain your thinking. Yes, the more this is because the higher the concentration of the liquid the more acidic or basic properties will be portrayed.
3. What do you think adding water (dilution) changes how acidic or basic the liquid is? Explain your thinking. Adding water holds implications for decreasing the acidic and basic properties as the dilution process reduces the concentration of the liquid.
4. a. Describe your tests and results. b. Were all of the liquids you listed in #1 in the simulation? If not, research to find the pH and identify each as acid or base. If all your items were in the simulation, look up a few other common things. (Cite references)
4. Experiment to check your ideas from #2 about how color or volume help identify whether something is acid, base, or neutral. Describe your tests and results with specific examples. Color change can be used to detect for pH changes using pH scale.
5. Experiment to check your ideas from #3 about whether dilution will increase, decrease or not change the pH.
a. Does every solution behave the same way? Yes, every solution will result in color change depending on the acidity or basic of the liquid.
b. Explain how you can use pH to help predict what dilution does to an acid or base solution. The pH will enable analysis for acidity as more water is added and the liquid becomes diluted the pH is expected to drop.
6. Consider some common drinks. Alkaline water 8.0, Fruit juice 6.8, Gatorade 3.0, Green tea 9.0, Gatorade 3.0, Vinegar 3.5,
a. Organize this list of foods with pH from most basic to most acidic.
Alkaline Water, Green tea, Fruit Juice, Vinegar, Gatorade
b. Which will have a higher pH if you dilute it with water? Vinegar and Gatorade will have a higher pH when diluted in water.
Part 2
1. a. Design experiments to gain a more quantitative understanding. Make sure to test changing the volume (add solution with the dropper or remove with the drain.) and diluting the solution by adding water.
b. Describe your tests, observations, and conclusions. Include images for evidence.
c. How does the molecular size representations compare to the pH?
This size of the molecules holds implications for concentration of the setup, thereby a greater number of molecules has greater concentration.
2. Describe how you could use the chart on the left of the screen to predict the relative acid or base characteristic of a solution:
a. What do you notice when the volume changes? The number of hydroxyl and hydrogen ions will shift in depending on the concentration of the solution
b. What do you notice when the solution is diluted? The number of hydrogen ions decreases while the hydroxyl increases
3. Calculate the H3O+ /OHratio for solutions of your choice using all three values: the Molecule count, Quantity of moles, and Concentration Show your work a. water b. one base c. one acid 4. How do the H3O+ /OHratio compare to the pH?
5. Does adding solutions, water, or removing solution change any of your values in #3? If so, explain why changes in the container causes the ratio to change.
6. If you measure the value of Hydronium concentration is 3.0×10-3 M/L, could you predict the solution to be acid, base, or neutral? Explain your answer. Yes this is through calculating the antilog of the concentration to identify the pH value of the liquid.
7. If you measure the number of Hydronium ions is 3.0×1012, could you predict the solution to be acid, base, or neutral? Explain your answer. Through antilog of the liquid the pH value can be identified. As 1.The solution is highly acidic
8. If you measure the number of Hydroxide ions is 3.0×10-2 moles, could you predict the solution to be acid, base, or neutral? Explain your answer. Through antilog of liquid the PH value can be identified as 1.0069 hence the solution is highly acidic
Test your understanding and self-check:
1. Which solution is acidic? C.
2. Which solution is basic? C. Due to increased Hydroxyl ions presents
3. Which solution is acidic? A. There are more hydrogen ions than hydroxyl ions present in the liquid.
4. What is the order from most acid to most basic? C. B, A, C
