Laboratory

• Acids ionize in aqueous solution to produce hydronium ions (H3O+)
• The strength of an acid depends on the degree to which it ionizes.
• Bases dissociate in

  aqueous solution to produce hydroxide ions (OH-)
• Ammonia gas, NH3, actually ionizes in aqueous solution to produce a weak base.
• The properties of acids and bases depend on the presence of free H3O+ or OH- as the predominant ion in a solution.
• To separate depressions in your spot plate, add about five drops of each of the Following: (1) 6M HCI

  (2) 6M HC2H3O2

  (3) 0.5M NaOH
• Add one drop of phenolphthalein indicator into each depression.
• How to indicate each depression 6M HCI (2) 6M HC2H3O2 (3) 0.5M NaOH

  Add one drop of phenolphthalein
• Dip a litmus paper for each of the three solutions (1) 6M HCI (2) 6M HC2H3O2 (3) 0.5M NaOH
• Add one drop of bromothymol blue to the solution in each depression.
• To separate depressions on one side of your spot plate, add small quantities of each

  of the following:

  (1) magnesium (2) iron (3) copper
• To each depression, add just enough 6M HCl to cover the metal.
• If the litmus paper turned blue it's acidic
• Half fill a clean test tube with lime water solution.
• To different depressions in your spot plate, add about five drops of each of the items