A pH or acid-base indicator is a compound that changes color ... red cabbage leaves in water to make an acid-base indicator solution. Students add laundry detergent powder (a base) and cream of tartar ...

If you're trying to get rid of stains, smells, or stiffness in your clothes, knowing how much laundry detergent to use is key. Using the correct amount of detergent for each load ensures clothes ...