Chemistry > Lab Experiment > Saint Louis University, Baguio City Main Campus - Bonifacio St., Baguio CityCHEM 07070L0778L-Group6- (All)

Saint Louis University, Baguio City Main Campus - Bonifacio St., Baguio CityCHEM 07070L0778L-Group6-Act3,Date Submitted: MARCH 15, 2021.VERIFIED

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Laboratory Activity 3 Stain Removal Objectives At the end of the activity, students should be able to: 1. Discuss the role of intermolecular forces of attraction in stain removal. 2. Discuss the ... concept of “like dissolves like” in the context of molecular interactions. Materials Distilled water Plastic cups Vinegar Rubbing alcohol Coffee Used cooking oil/ grease Juice Dishwashing liquid Experimental Procedure 1. Using different colored Sharpies, draw three or more concentric circles in the center of each of the three coffee filters or used tea bags. 2. Fold the coffee filters or used tea bags half twice, creating a triangle shape with the circles showing at the point. 3. Fill the three small cups with three different solvents: Cup A – distilled water Cup B = vinegar Cup C = rubbing alcohol 4. Gently place a folded coffee filter in each cup and observe any changes for about 10-15 minutes 5. This time, do steps 1 to 4 but warm your solvents. 6. Observe any changes for about 10-15 minutes. 7. This time, do the procedure by adding a diluted dishwashing liquid to all cups. Repeat the whole procedure using the following stains introduced to the coffee filter or used tea bags. a. Coffee b. Grease c. Juice [Show More]

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