Acid-Base ChallengeOnline version Test your knowledge of acids and bases in this fun and educational game! by DeAndra 1 Acids 2 Bases 3 Indicators 4 Applications 5 Neutral Sour taste Turns blue litmus paper RED Can dissolve substances Feel slippery Turns red litmus paper BLUE Taste bitter Litmus Paper Phenol- phthalein Universal Indicator Red Cabbage Indicator Batteries Cleaning Products Food Preservation Fertilizers pH Regulation pH 7 Not an acid or a base