3. Yes or No? Does the pH seem to depend upon the concentration of [H3O+] ions? 4. We always assume that strong acids will 100% ionize in water. Click reset and move the slider to strength: strong. Insert the probe. Record pH. Observe the number of ions in the beaker and click <Graph> to observe the concentrations. pH Value = ______________ YES or NO? Does the beaker contain particles that have not ionized and have 0% concentration? If so, what particle seems missing? ____________________. Why is it likely missing? 5. Click reset and change to a base. Repeat #1-4 above and describe any different results or simply write, results for “Same bases.” #1: #2: #3: #4: Conclusions: If the answer is no, explain why not. 6. YES or NO? Can a weak acid be concentrated? 7. YES or NO? Can a strong acid be dilute? 8. YES or NO? For acids, can increasing the initial concentration increase the pH? 9. YES or NO? For Bases, can increasing the initial concentration increase the pH?
3. Yes or No? Does the pH seem to depend upon the concentration of [H3O+] ions? 4. We always assume that strong acids will 100% ionize in water. Click reset and move the slider to strength: strong. Insert the probe. Record pH. Observe the number of ions in the beaker and click <Graph> to observe the concentrations. pH Value = ______________ YES or NO? Does the beaker contain particles that have not ionized and have 0% concentration? If so, what particle seems missing? ____________________. Why is it likely missing? 5. Click reset and change to a base. Repeat #1-4 above and describe any different results or simply write, “Same results for bases.” #1: #2: #3: #4: Conclusions: If the answer is no, explain why not. 6. YES or NO? Can a weak acid be concentrated? 7. YES or NO? Can a strong acid be dilute? 8. YES or NO? For acids, can increasing the initial concentration increase the pH? 9. YES or NO? For Bases, can increasing the initial concentration increase the pH?
Acid-BaseWebLabPhET.docx