acids and bases
...d. I think that it will only take around 3.7ml of acid. A pH scale can test the antacid to see how much acid it has. I also think that the phenolphthalein will change the color of the antacid a lot. 4) Materials needed -pH scale -10 drops of phenolphthalein -Paper -Pipette -Flask with ml measured -Analytical scale 5) Procedure - Use the mortar and pestle to grind up one antacid tablet. - Weigh the powder using the analytical scale and paper weighing boat. Record the measurements. - Place powder into flask and fill with water to 100ml. - Mix powder and water by gently “swirling” the flask, and use a piece of pH paper to record a pH reading. - Add five drops of the indicator phenolphthalein to the flask. Take another pH reading. - Obtain a test tube of acetic acid from the teacher and a plastic pipette. - Using the pipette full of acid drop the acid into the flask drop by drop. Gently swirling the flask after each drop. - Record the number of drops of acid when you notice a permanent color change. Take another pH reading. - Clean all materials used and return to tea...