Tide detergent did the best and tap water did the worst, Purex was second worse. Our controls were the same amount of detergent and the same amount of soda stain. The independent variable is the brand of detergent and the dependent variable is the % of soda cleaned. The control group was the tap water. My hypothesis was correct about Tide being the best, but it was only 15% better. An error that could have happened was we could have counted the wrong percent of stain left.
Did you know that Tide laundry detergent is the best at cleaning soda stains out of Purex and Arm & Hammer
Wow, I never knew that, this is useful information for laundry