Question

place each substance on the ph scale

Explanation:

Step1: Recall pH of acids

Acids have pH < 7. Stomach acid (pH 1 - 3), vinegar (pH 2 - 3) are acids.

Step2: Recall pH of neutral substances

Pure water is neutral with pH = 7.

Step3: Recall pH of weak bases

Milk is slightly acidic to nearly neutral (pH 6.3 - 6.6), ammonia (pH 11 - 12), baking soda (pH 8 - 9) are weak - bases.

Step4: Recall pH of strong bases

Drain cleaner is a strong base with pH 13 - 14.

Answer:

Stomach acid: 1 - 3; Vinegar: 2 - 3; Pure water: 7; Milk: 6.3 - 6.6; Ammonia: 11 - 12; Baking soda: 8 - 9; Drain cleaner: 13 - 14