1. Sodium hydroxide turns red litmus paper blue.   True   False   2. A pH scale reading of 13 indicates a _______.   strong base   weak acid   strong acid   weak base   Hint Half-n-half Clue   3. Methyl orange solution turns bases _______.   pink   yellow   colorless   orange   Half-n-half Clue   4. Bromothymol blue solution turns bases _______.   colorless   yellow   blue   orange   Half-n-half Clue   5. Sulfuric acid turns red litmus paper blue.   True   False   6. A pH scale reading of less than 7 indicates _______ medium.   an unknown   an acidic   a basic   a neutral   Half-n-half Clue   7. Pure distilled water gives a pH scale reading equal to _______.   1   7   14   0   Half-n-half Clue