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Constructed Response . Topic 8: Acids, bases and salt

Set G: Titration, Titration calculation

Base your answers to questions 17 and 18 on the information and data table below.

Using burets, a student titrated a sodium hydroxide solution of unknown concentration with a

standard solution of 0.10 M hydrochloric acid. The data are recorded in the table below.
Titration Data
Solutions HCl (aq) NaOH (aq)

Initial Buret Reading ( mL) 15.50 5.0
Final Buret Reading (mL ) 25.00 8.80

Teacher Preview Copy

Teacher Preview Copy
17. Determine both the total volume of HCl(aq) and the 17. Total volume of HCl (aq) used: ____mL

total volume of NaOH(aq) used in the titration. Total volume of NaOH (aq) used: ____ mL

18. Show a correct numerical setup for calculating the 18.

molarity of the sodium hydroxide solution.

19. Calculate the molarity of the sodium hydroxide 19.

solution from your setup.

Set H: Electrolytes, pH, Arrhenius acids, Arrhenius bases, salts

Base your answers to questions 20 through 23 on the information and diagrams below.

o
Four beakers each containing 100 milliliters of aqueous solution of equal concentration at 25 C.

KCl CH3OH Ba(OH)2 CH3COOH

Write your answers here.

20. Which solutions contain electrolytes? 20.

21. Which solution has the lowest pH? 21.

22. Which solution is most likely to react with 22.

Arrhenius acid to form a salt and water?

23. Which solution has the lowest freezing point? 23.

24. What causes some aqueous solution to have a low pH? 24.

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