1. Pure distilled water gives a pH scale reading equal to _______.   14   7   1   0   Hint Half-n-half Clue   2. A pH scale reading of _______ indicates a weak acid.   8   2   6   13   Half-n-half Clue   3. A pH scale reading of 2 indicates a _______.   strong acid   weak acid   strong base   weak base   Half-n-half Clue   4. Sulfuric acid turns red litmus paper blue.   True   False   5. Addition of phenolphthalein solution to an acid results in no color change.   True   False   6. A pH scale reading of _______ indicates a weak base.   6   8   2   13   Half-n-half Clue   7. Phenolphthalein solution turns bases _______.   orange   yellow   pink   colorless   Half-n-half Clue