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Getting to Know pH Classifying Acids and Bases The pH of a solution is a number which tells how acidic or basic a solution is. pH values can range from 0 to 14. Determine whether the brief statements below describe an acid, a base or a neutral solution. On the blank in front of the statement, type A for acid, B for base or N for neutral. Some questions may have more than one answer. 1. Blue litmus turns red. 2. Red litmus doesn’t change color 3. Contains more H+ than pure water 4. pH 4 5. pH 7 6. Vinegar 7. Contains less H+ than pure water 8. Drain cleaner 9. Household ammonia 10. Lemon juice 11. On the pH scale below, label the pH ranges for strong acid, weak acid, strong base, weak base, and neutral by dragging the text boxes to the correct locationalong the scale. 1acidacid/neutralacidacidneutralacidbasebasebaseacidStrong acidNeutralWeak baseWeak acidStrong baseName: Student ID:
Measuring the pH of a Solution 12. Each pH increment on the pH scale represents a ten-fold change in H+ ion concentration.