Im doing my science fair and i was wondering how you could measure the cleaning power of dish soap?
925561
measure water, water temp and motor oil on glass, metal and plastics times 3 (using three different detergents three containers in which to clean them and report on how they each work how long it takes for them to work and the quality of the job.
388409
You can take many physical and sensory measurements on the dried materials before and after the experiment, such as crystal structure, color, odor, density, pH, approximate hardness/strength (i.e., resistance to grinding). \nYou can measure the temperature it reached when boiling and look up the decomposition temperature in the Handbook of Chemistry and Physics if you can find a copy; probably can find something like it on web. Look up boiling point of solution and be sure you use one of the strengths you find in the actual solution; compare to actual boiling point.\nDepending on the type of sugar, you might be able to use Benedict's test for sugar (ref.)
558485
It is called Total Fatty Matter. It gives the lather producing capacity of the soap. The more it is the good the soap is.
911223
Take 1ft. as your height of the capillary tube - when placed in a trough of water.\nAdd eac detergent each time (separately), notice the rise in level - looong time consuming, since u need to change water for each detergent, but a short way is:\nFrom ur experience, see which is the strongest detergent, in order of strength - separate them by 0.5 gradation - meaning, if ur tube gradation is 1mm, the diff. in level between the consecutive order (of detergents) will be 0.5 mm respectively.
394827
yes you can. For real low freq. you can actually do a DC measurement. Just slow the sweep rate way down and you will see it.
29518
There are different levels.\n\n99.9% is called 3-log removal.\n99.99% is called NaCL efficiency\n\nHand sanitizers remove either 99.9 or 99.99% of "common" bateria.\n\nHOWEVER, if you look, you will see that soap does exactly the same thing!
826531
tiny amounts of chemical can stick to differnt things, like stir bar, stir rod, thermometer and if you remove these items before the experiment is over then you remove some chemicals.  Other kinetics events that your not considering. as in pressure, humididtym and so on.  If you used a Ph probe then maybe it wasn't calibrated right or isn't properly maintained
842421
Recipe at:\nhttp://www.gisbornesc.vic.edu.au/home/jans/year9/polsh.htm\n\nYou'll have to convert the metric measurements into American by using your own brain or http://www.onlineconversion.com\n\nThere's a very basic method at this site, that doesn't involve chemicals, etc.\nhttp://ri.essortment.com/cleanandleath_rjmd.htm
963521
I'll answer the last part of your question first. Soap is made up of polar molecules. That just means that one end of each molecule is different from the other like the poles of a magnet. One end dissolves in grease and fats while the other end dissolves in water. Since most really dirty things are fatty and greasy, this means that one end of each soap molecule sticks to the dirt on your hands while the other end sticks to the water running over them. This washes the dirt away. Why not use plain water? If you don't have soap plain water will help get you clean but because of surface tension water won't stick to grease so you will never get completely clean. Another class of cleaners solves this problem. Detergents reduce the surface tension of water allowing it to clean better. Look at the list of ingredients on your cleanser. If one of them is Sodium Lauryl Sulfate, your cleanser is a detergent. Now for the first part of your question. Long ago people found that you could make a cleaner by heating lard (renderings from animals killed for food) with potash, an alkali produced by burning wood, probably for cooking the aforementioned food. This discovery was probably accidental, the result of being in the right place at the right time. It took place so long ago that the discoverer (or discoverers, it probably happened in several places at different times) is lost in history. BTW. It's no coincidence that many of today's soap producers are owned by or connected to slaughter houses and meat producers. Do some research on Procter and Gamble. Your teacher will be proud of you.
7633
Dawn is better than most dish washing liquids, but can occasionally leave a residue stain.  Another method uses a commercial product call Greased Lightning.  See the reference.
491886
I always use warm water and mild dish soap. This will clean the disk if there isn't alot of deep scratches.
430626
Drop one onto the kitchen scales & see. Always clean the scale well after use. You have to be hygenic. ;o)
899395
What you are seeing is surface tension.  Water molecules have an attraction to each other.  They sort of "hold on" to the water molecules allowing the level to rise without spilling over.  \n\nIf you create the bubble by adding pennies and add a drop of dish detergent you will see that the soap breaks that surface tension and the water will spill.
518886
1.   Grate one bar of soap...use new or old pieces  \n  \n2.   Place the grated soap and 1 c. boiling water in a blender and set it on "whip."  \n  \n3.   Add 1 tbsp. honey and 1 tsp. glycerin and stir.  \n  \n4.   Cool the mixture for 15 to 20 minutes and whip again.  \n  \n5.   Add cold water to the mixture until you have 6 c.  \n  \n6.   Whip the mixture again.  \n  \n7.   Pour it into a storage container and let it cool. Do not place a lid on the container.  \n  \n8.   Fill a pump dispenser with the soap. Shake before using.  \n____________________________________________________\nLiquid / Gel Soap \n\n2 cups soap flakes or grated bar soap \n1/2 gallon water \n2 tbsp glycerin \nMix ingredients together in a large pot or dutch oven. Set over low heat, stirring occasionally until the soap has dissolved. Transfer to a jar and cover tightly. For a less thick gel soap, use 1 gallon of water.
519141
you can measure the volume if you are very quick.\n\ntake a scaled glass, preferably one used in labs with a scale in mm3 or cm3, pour some water in it and read on the scale the volume of water.\nThen put the pretzel in the water and quickly read again the scale. \nThe volume of the pretzel is the difference between the second reading and the first one.\nDo it fast because the pretzel may absorb water. Or paint the pretzel with nail polish to be waterproof! :-)\n\nThe surface area is more difficult, but you can use a millimeter paper to have an approximate value. Put the pretzel on it, and draw around carefully the shape. Then count how many little squares are inside the contour lines, and multiply it with the area of one little square (= 1 mm2) :-)))\n\nHave fun!!!
900972
You could use a turbidometric method that could detect the diffraction of light through the liquid and correlate it with the amount of microbial growth in it.  \n\nYou could also use a calibrated loop to plate the liquid and then count colonies.  I know they do this with urine cultures in hospital labs at times.  The loop picks up a certain amount of liquid like 10 microliters or so and then you can correlate the growth with this 10 microliter figure.
628263
Make Bubble solution\n\nDifficulty: Easy\n\nTime Required: 10 minutes plus rest time\n\nWhat You Need:\n1/2 c. dishwashing liquid\n4 1/2 c. water\n4 T. glycerin\nlarge covered container\nbubble wands\n\n\nHere's How:\n1.   Combine 1/2 cup dishwashing detergent, 4 1/2 cups water, and 4 tablespoons of glycerin in a large container with a cover.\n\n2.   Mix well, then allow the mixture to rest, covered, until ready for use.\n\n3.   Pour bubble solution into a shallow container. Dip bubble wands -- such as cookie cutters, shaped pipe cleaners or wire -- into the solution and blow!\n\n\nTips:\nJoy is usually the recommended brand of dishwashing liquid.\nFor best results, use distilled water.\nAs an alternative to glycerin, some recipes recommend using white corn syrup.