Seven Chances essays

Seven Chances essays Out of Dawn, SunLight, and Dove, which brand of dish-washing detergent performs best at a variety of tests? Three brands of dish-washing detergent will be tested for pH level, flash-foam formation, foam stability, relative viscosity, cost per liter, and a standard cleaning test. I think the brand Dawn will perform the best overall. 1 15 mL sample of each brand of detergent; 3 test tubes; 1 universal pH tester ink with dropper; 3 test tube stoppers; 3 50 mL graduated cylinders; 1 stopwatch; 15 BBs; 1 bottle vegetable oil; 3 500 mL beakers. 1.) Dilute 1 mL of each detergent into 100 mL of water. 3.) Put 10 mL of the solution into a test tube and then place the Universal Indicater into the test tube. B.) Determination of Flash Foam Formation 1.) Pour 25 mL of solution into a 125 mL graduated cylinder. 2.) Put a stopper (or hand) over it. 4.) Measure volume of foam produced (Amount of foam = total volume - 25 mL). 1.) Continuing from part B, uncap the graduated cylinder. 2.) Continue measuring volume of foam every sixty seconds for five minutes. D.) Detemination of Relative Viscosity 1.) Fill a test tube with water and measure the time it takes a BB to reach the bottom once dropped from the top. 2.) Fill a new tube with detergent and measure and record the time. 3.) Repeat five times and record the data. 4.) Return the detergent to its bottle. E.) Determining the Cost per mL of Detergent 1.) Divide the total volume of the bottle by the cost in cents. total volume (mL) x 1 mL = cost/ ...