Seven Chances

Problem: Out of “Dawn”, “SunLight”, and “Dove”, which brand of dish-washing detergent performs best at a variety of tests? Experimental Design: 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. Hypothesis: I think the brand “Dawn” will perform the best overall. Materials: 1 15 mL sample of each brand of detergent; 3 test tubes; 1 universal pH tester ink with dropper; 3 test tube …

…Dawn” brand performed best at all but two tests. It is reasonably more expensive and a little more acidic than the other two brands. If money is not a factor and your skin is not sensitive, than “Dawn” would be the choice for you. For those whose hands are more sensitive, both “SunLight” and “Dove” would be a good choice, as they performed almost equally in each test. Dove the slightly cheaper of the two.