1. A pH scale reading of 13 indicates a _______.   weak acid   strong base   weak base   strong acid   Hint Half-n-half Clue   2. Sodium hydroxide turns red litmus paper blue.   True   False   3. Bromothymol blue solution turns acids _______.   colorless   yellow   blue   orange   Half-n-half Clue   4. Phenolphthalein solution turns bases _______.   yellow   pink   colorless   orange   Half-n-half Clue   5. A pH scale reading equal to 7 indicates _______ medium.   a neutral   an acidic   a basic   an unknown   Half-n-half Clue   6. Addition of phenolphthalein solution to an acid results in no color change.   True   False   7. Methyl orange solution turns acids _______.   yellow   pink   orange   colorless   Half-n-half Clue