1. Yr 7 APP – LAT AF 4b Using Investigative Approaches AIM Plan an investigation, collect evidence safely and present the data appropriately. Investigate which indigestion tablet is the best. www.appinscience.com

2. Variables Which antacid tablet is best? Discuss which variables you will Control (keep the same) Change (Independent) Measure (Dependent) - volume of acid - type of tablet - amount of indicator - volume of acid - volume of water - pH of acid after reaction with tablet.

3. Identifying and Controlling Risk Crushing antacid tablets Handling acidHandling glassware Risks to you Risks to others How you will control the risks Discuss the risks involved with investigating the effect of different antacids on hydrochloric acid. Complete the table.

4. Variables that are difficult to control. Discuss and decide which variables are the easiest and most difficult to control when investigating the effectiveness of different antacids on the neutralisation of hydrochloric acid. Volume of acid Mass of tablet Amount of antacid left on filter paper Amount of indicator Concentration of acid Antacid ingredients Size of tablet EASY TO CONTROL DIFFICULT TO CONTROL Time to dissolve Temperature of acid Type of acid