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Across 1. a base that releases few hydroxide ions in aqueous solution 4. the pH range through which an indicator changes color 6. an acid that releases few hydrogen ions in aqueous solution 7. an acid that forms when a base gains a proton 9. acids form these kinds of ions 12. an acid that ionizes completely in a solvent 13. an acid that ionizes completely in a solvent 16. a compound that can reversibly change color depending on the pH of the solution or other chemical change 17. slippery feel, often solids, turns red litmus paper blue 18. describes an aqueous solution that contains equal concentrations of hydronium and hydroxide ions

Down 2. a solution of known concentration 3. bases form these kinds of ions 5. a solution of known concentration that is used to titrate a solution of unknown concentration 7. a base that forms when an acid loses a proton 8. a value used to express the acidity or alkalinity of a solution 10. describes a substance that has the properties of an acid and the properties of a base 11. a base that releases few hydroxide ions in aqueous solution 14. a method used to determine the concentration of a substance in solution of known volume and concentration until the reaction is completed 15. highly caustic dissolved compound, often liquid/gas, turns blue litmus paper red