Pepto-Bismol (bismuth subsalicylate) and Tums (calcium carbonate) are similar in that ... chewables, and liquid. Fast-acting. It has a noticeable effect in 30 to 60 minutes. If you do not feel ...

Calcium carbonate is in eggshells, seashells, a rock called marble, and in antacid tablets like Tums and Rolaids. In this activity, you can use a common liquid to detect calcium carbonate! Cover your ...