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SPRING BREAK PRACTICE IV

# SPRING BREAK PRACTICE IV - Which of the following would be...

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Friday, March 18, 2011 – SPRING BREAK PRACTICE IV! =] 1. Predict the relative pH of each of the following .10 M solutions (less than 7, 7, greater than 7) and explain your prediction. W. NaCl X. Na 2 CO 3 Y. NH 4 Cl Z. Al(NO 3 ) 3 2. A 0.200 M aqueous solution of a salt NaX has pH = 8.74. What is the value of K a for the acid HX? 3. Calculate the pH of a solution prepared by mixing 20.0 mL of 0.30 M HCl with 15.0 mL of 0.60 M NaOH

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4. A researcher prepares an approximately 0.5 M solution of HF (K a = 6.6 x 10 -4 ) and wishes to determine its precise molarity by titrating it with 0.500 M KOH solution.
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Unformatted text preview: Which of the following would be the best indicator to use in this titration? indicator pH range for color change A. thymolphthalein 9.5 - 10.5 B. thymol blue 8.0 - 9.5 C. bromthymol blue 6.0 - 7.5 D. bromcresol green 4.0 - 6.0 E. methyl orange 3.0 - 4.0 5. The Ksp for BaF2 is 2.4 × 10-5. When 10 mL of 0.01 M NaF is mixed with 10 mL of 0.01 M Ba(NO3)2, will a precipitate form? Why or why not?...
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