1. Sodium hydroxide turns red litmus paper blue.   True   False   2. Addition of phenolphthalein solution to an acid results in no color change.   True   False   3. A pH scale reading of 2 indicates a _______.   strong acid   weak acid   strong base   weak base   Hint Half-n-half Clue   4. Methyl orange solution turns bases _______.   yellow   pink   colorless   orange   Half-n-half Clue   5. A pH scale reading of 13 indicates a _______.   weak acid   weak base   strong acid   strong base   Half-n-half Clue   6. Bromothymol blue solution turns acids _______.   orange   colorless   yellow   blue   Half-n-half Clue   7. A pH scale reading of _______ indicates a weak acid.   13   6   8   2   Half-n-half Clue