Student Exploration_ Titration.docx - Student Exploration:...

This preview shows page 1 - 3 out of 7 pages.

Student Exploration: TitrationPrior Knowledge Questions(Do these BEFORE using theGizmo.)There are several definitions of acids and bases. According to theBrønsted-Lowry definition, an acid is a substance that is capableof donating a proton to another substance. A base is a substancethat accepts protons. When an acid and a base are combined, theacid is neutralized as the base accepts the protons produced bythe acid.One way to determine if a solution is acidic or basic is to use litmus paper, as shown above.There are two types of litmus papers: red and blue.How does litmus paper indicate an acid?
How does litmus paper indicate a neutral substance?
How does litmus paper indicate a base?
Gizmo Warm-upLitmus is an example of anindicator, asubstance that changes color depending on itspH(pH is a measure of the concentration ofprotons, or H+ions). In theTitrationGizmoTMyou will use indicators to show how acids areneutralized by bases, and vice versa.To begin, check that1.00MNaOHis selectedfor theBurette,MysteryHBris selected for theFlask, andBromthymolblueis selected fortheIndicator1. Look at the flask. What is the color of the bromthymol blue indicator?,.
2. What does this tell you about the pH of the solution in the flask?Page 1 of 7
Student Exploration: TitrationacidicSolutions with a pH below 7.0 are acidic, while those with a pH above 7.0 are basic.3. Move the slider on the burette to the top to add about 25 mL of NaOH to the flask. Whathappens, and what does this tell you about the pH of the flask?
1. Calculate: Concentration is measured bymolarity(M), or moles per liter. Brackets are alsoused to symbolize molarity. For example, if 0.6 moles of HNO3 are dissolved in a liter ofwater, you would say [HNO3] = 0.6 M.

Upload your study docs or become a

Course Hero member to access this document

Upload your study docs or become a

Course Hero member to access this document

End of preview. Want to read all 7 pages?

Upload your study docs or become a

Course Hero member to access this document

Term
Spring
Professor
bahram-ahi
Tags
pH, Sodium hydroxide

  • Left Quote Icon

    Student Picture

  • Left Quote Icon

    Student Picture

  • Left Quote Icon

    Student Picture