Part A: Properties of Acids and Bases 1. Acids taste ____________ and bases taste ______________. 2. Acids react with metals to produce ________________ gas. 3. Acids turn litmus __________ and bases __________. 4. Phenolphthalein is ___________________ in an acid and _________________________ in a base. 5. Bases feel ___________________. 6. Bases are often used as __________________________________. 7. Acids produce _______________ ions and bases produce ___________________ ions. 8. Acids and bases both ______________________________________.