Consider a buffer comprised of a weak acid (HA), pKa = 5.0) and its conjugate base (A). Which of the following statements about this buffer is/are true? The buffer is better able to absorb excess base at pH 4 than at pH 6. At pH values lower than the pKa, the concentration of the weak acid (HA) is higher than the concentration of the conjugate base (A¯). The pH of a buffered solution will remain constant no matter how much acid or base is added to the solution. The capacity of the buffer would be increased if equal concentrations of HCI and NaOH were added. When the pH 5.0, the concentration of the weak acid (HA) is equal to the concentration of the salt (A¯). =

Compare and Contrast any two microscopy techniques.

Crossword Puzzle 6 10 4 13 15 5 11 12 3 7 14 2 Name: 1 Across 1. Glassware. Erlenmeyer base, narrow opening. 3. Measure mass on a walks on a 4. If there's a outside in designated area. 10. You may not 11. Never beam. stock bottle. 7. Heating test tube over flame? Point opening from your face and others. 13. Always wear lab. 15. Dispose of 8. Spilled an irritant on skin or in eye? Flush for minutes. or drink in the lab. unused chemicals to a Down 1. The 2. 3. 5. 6. wide Gymnast exit quickly, and meet -toe shoes in the in the proper container. Before leaving the lab, area. hoods pull in noxious vapors. your work Glassware with a wide mouth, used to transport materials. Also a Muppet. Someone hurt? Notify your immediately. Pull back long. when working with flames. 9. Measure volumes with a cylinder. Also, what the class of 2023 did. 12. Always wear safety glasses or when anyone is working in the lab. 14. Be covered from shoulders to Also, "head, shoulders, and toes." 15. Trying to smell a…

Select Draw Rings More Erase .D

The rotovap works to efficiently evaporate solvents by ________.     reducing pressure     heating     spinning     vibrating     Reducing pressure, heating, and spinning     Reducing pressure, heating, spinning, and vibrating