Table of Contents

The Excess of Cleaning Detergent Left on Clothes after Washing

Table of Contents

Effects on environment

Applications of Experiment

Future Research

Acknowledgements

Observations:

　

pH levels:

pH of water: 7.5

Amount of Water: 42.1 L

　

Table 1- pH of Tide:

Amount of Detergent	1st cycle (pH)	2nd cycle(pH)	3rd cycle(pH)	4th cycle(pH)
60 g	10.4	9.7	7.8	7.7
30 g	10.2	7.9	7.7	7.4

Table 2- pH ofSunlight:

Amount of Detergent	1st cycle(pH)	2nd cycle(pH)	3rd cycle(pH)	4th cycle(pH)
120g	10.8	10.2	9.1	7.7
60	10.7	9.2	9	7.7

　

Table 3- pH of Xtra:

Amount of Detergent	1st cycle(pH)	2nd cycle(pH)	3rd cycle(pH)	4th cycle(pH)
120g	10.5	9.9	8.9	7.7
60	10.2	9.0	7.6	7.3

Concentration [OH-]:

pOH + pH = 14

[OH-] = 10^-pOH

Table 4- Concentration of Tide (mol/L):

Amount of Detergent	1st cycle	2nd cycle	3rd cycle	4th cycle
60 g	2.51x10^-4	5.01 x10^-5	6.31 x10^-7	5.01 x10^-7
30 g	1.58 x10^-4	7.94 x10^-7	5.01 x10^-7	2.51 x10^-7

Table 5- Concentration of Sunlight (mol/L):

Amount of Detergent	1st cycle	2nd cycle	3rd cycle	4th cycle
120g	6.31 x10^-4	1.5 x10^-4	1.26 x10^-5	5.01 x10^-7
60	5.01 x10^-4	1.56 x10^-5	1 x10^-5	5.01 x10^-7

Table 6- Concentration of Xtra (mol/L):

Amount of Detergent	1st cycle	2nd cycle	3rd cycle	4th cycle
120g	3.2 x10^-4	7.9 x10^-5	7.9 x10^-6	5.01 x10^-7
60	1.58 x10^-4	1x10^-5	3.98 x10^-7	1.9 x10^-7

Detergent left on clothes:

Table 7- Using Recommended Amount:

Machine	pH			Concentration
Machine	Tide	Sunlight	Xtra	Tide	Sunlight	Xtra
North American	9.7 pH	10.2 pH	9.9 pH	5.01 x10^-5mol/L	1.5 x10^-4 mol/L	7.9 x10^-5mol/L
European	7.7 pH	7.7 pH	7.7 pH	5.01 x10^-7 mol/L	5.01 x10^-7mol/L	5.01 x10^-7 mol/L

　

Table 8- Using Half the Recommended Amount:

Machine	pH			Concentration
Machine	Tide	Sunlight	Xtra	Tide	Sunlight	Xtra
North American	7.9 pH	9.2 pH	9.0 pH	7.94 x10^-7 mol/L	1.56 x10^-5 mol/L	1x10^-5 mol/L
European	7.4 pH	7.7 pH	7.3 pH	2.51 x10^-7 mol/L	5.01 x10^-7 mol/L	1.9 x10^-7 mol/L