Phenol red - Study guides, Class notes & Summaries

Developed smallpox immunization using cowpox agent - Answer-Edward Jenner Sought a "magic bullet" to destroy pathogens & not host - Answer-Paul Ehrlich Discovered penicillin - Answer-Alexander Fleming Pioneered aseptic surgery, Prevented surgical infections by using mists of phenol - Answer-Joseph Lister Father of Epidemiology (Cholera in London) - Answer-John Snow Pioneered asepsis by discovering that hand washing prevented streptococcal infections in obstetric patients - Answer-Ignaz Sem...

12 Reasons why the health inspector will close your pool - ANSWER 1. pump filter not working for more than an hour 2. main drain is not visible 3. chemical readings out of range 4. no pool operator (15 minute grace period) 5. no lifeguard or cpr certs present 6. water is below the skimmer line 7. danger to the public 8. chlorinator is not working 9. health inspector is not allowed in 10. bathrooms + drains not working 11. flow rate is too low 12. no phone (landline) Measuring reco...

Chapter 01 - Structure and Bonding 1. Give the ground-state electron configuration for carbon (atomic number 6). 1s22s22px12py1 or 1s22s22p2 2. Give the ground-state electron configuration for fluorine (atomic number 9). ANSWER: POINTS: 1 1s22s22px2 2py2 2pz1 or 1s22s22p5 3. Give the ground-state electron configuration for magnesium (atomic number 12). 1s22s22p63s2 4. How many electrons does silicon have in its valence shell? ANSWER: four POINTS: 1 Exhibit 1-1 Write valid Lewis (elec...

used to measure pH (Ans- phenol red valves are open if handle is ______ to the pipe (Ans- parallel how acidic or basic a solution (pool water) is (Ans- pH acceptable range of Total Alkalinity in a pool (Ans- 60 to 180 acceptable range of pH in a pool (Ans- 7.2 to 7.8 acceptable range of calcium hardness in a pool (Ans- 150 to 400 maximum reading for total dissolved solids (TDS) (Ans- 1500 pH of a human eye (Ans- 7.5

Certified Pool Operator Exam | 100% Correct Questions and Verified Answers| Grade A (2024/ 2025 Update) Q: What is the primary reason for using cyan-uric acid?(a) Protect chlorine from sunlight (b) Lower pH (c) Raise pH (d) Lower chlorine Answer: (a) Protect chlorine from sunlight Q: The chemical most commonly used to raise pH is: Answer: (c) Sodium carbonate Q: An example of a chemical used to stabilize chlorine is: Answer: (b) Cyan-uric acid Q: The...

Certified Pool Operator Final Exam (Latest 2024/ 2025 Update) 100% Correct Questions and Verified Answers| Grade A Q: Because carbonate ions combine with hydrogen ions, sodium carbonate will cause pH to: Answer: Rise Q: When enough chlorine is added to cause complete oxidation of all organic compounds, a sudden drop in residual chlorine may be noticed. The point at which this occurs is called the: Answer: Break-point Q: "Residual chlorine" refers to: Answer: ...

CPO Practice Test Questions and Answers Already Passed Which type of filter requires the least amount of water to clean? (A) Diatomaceous (B) Rapid rate sand (C) High rate sand (D) Cartridge (D) Cartridge Cyanuric acid (stabilizer) protects free chlorine (FC) against the effects of: (A) Pathogens like Crypto, Giardia, and Shigella (B) High Total dissolved solids (C) Ultraviolet rays from the sun (D) High PH (C) Ultraviolet rays from the sun An erosion chemical feeder is what ty...

This reaction initiates the putrefactive process hydrolysis proteolysis saccharolysis lipolysis hydrolysis Paraformaldehyde is a: gas liquid solid solid The pH of embalming fluid is determined by: the embalmer the funeral director the fluid manufacturer the condition of the body the fluid manufacturer From inside the body: intrinsic extenuating extrinsic intima external intrinsic __________ is a rapid-acting cautery agent that is excellent for dryi...

Microbiology Lab 9 questions with Complete Solutions rated A+ Describe the selective and differential properties of mannitol salt agar (MSA) for the isolation and identification of staphylococci. - As a selective medium, MSA has a high concentration of salt (7.5% NaCl), which is inhibitory to most bacteria other than the staphylococci. As a differential medium, MSA contains the sugar mannitol as a substrate for fermentation and phenol red as a pH indicator to detect the production of acid....

Describe the selective and differential properties of mannitol salt agar (MSA) for the isolation and identification of staphylococci. - As a selective medium, MSA has a high concentration of salt (7.5% NaCl), which is inhibitory to most bacteria other than the staphylococci. As a differential medium, MSA contains the sugar mannitol as a substrate for fermentation and phenol red as a pH indicator to detect the production of acid. S. aureus ferments mannitol and changes the color of the mediu...