Caitlin+D

__**Sceince Fair Project**__

__Materials needed__ -4 diff. types of liquid detergent -4 diff. types of powder detergent -pH strips (either homemade or bought from a store) -Washing Machine (That has hot, warm, and cold water)

__Procedures__ 1.Gather clothes 2.fill washing machine with desired temp. of water 3.measure the pH of the water w/o detergent 4.measure the pH of the detergent before adding water 5. add detergent and mix well 6.meause pH of water w/ detergent 7.add clothes and mix well 8.measure pH of water with detergent and clothes 9. start washer 10.measure pH of water during rinse cycle 11.continue wash cycle 12.at the end of the complete wash cycle meause pH od residual washer left in clothes

Then repate this procedure using each diffrent type of dertgent brand and type(liquid / solid) of detergent in each of three water temps. (cold / hot / warm)

Question:Which brand/type of detergent at which temp. has the closest end pH level to the beginging pH level of plain water?

Hypo:If liquid detergents have a lower pH in hot water, then it will be the one closet to the plain water pH.