A chemist must prepare 500.0 mL of sodium hydroxide solution with a pH of 13.00 at 25 °C. He will do this in three steps: • Fill a 500.0 mL volumetric flask about halfway with distilled water. • Weigh out a small amount of solid sodium hydroxide and add it to the flask. Fill the flask to the mark with distilled water. Calculate the mass of sodium hydroxide that the chemist must weigh out in the second step. Round your answer to 2 significant digits. 0 g 0 x10 X

Chemistry & Chemical Reactivity
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Author:John C. Kotz, Paul M. Treichel, John Townsend, David Treichel
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Chapter21: The Chemistry Of The Main Group Elements
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A chemist must prepare 500.0 mL of sodium hydroxide solution with a pH of 13.00 at 25 °C.
He will do this in three steps:
• Fill a 500.0 mL volumetric flask about halfway with distilled water.
• Weigh out a small amount of solid sodium hydroxide and add it to the flask.
• Fill the flask to the mark with distilled water.
Calculate the mass of sodium hydroxide that the chemist must weigh out in the second step. Round your answer to 2 significant digits.
g
x10
X
Transcribed Image Text:A chemist must prepare 500.0 mL of sodium hydroxide solution with a pH of 13.00 at 25 °C. He will do this in three steps: • Fill a 500.0 mL volumetric flask about halfway with distilled water. • Weigh out a small amount of solid sodium hydroxide and add it to the flask. • Fill the flask to the mark with distilled water. Calculate the mass of sodium hydroxide that the chemist must weigh out in the second step. Round your answer to 2 significant digits. g x10 X
A chemist dissolves 874. mg of pure sodium hydroxide in enough water to make up 90. mL of solution. Calculate the pH of the solution. (The
temperature of the solution is 25 °C.)
Be sure your answer has the correct number of significant digits.
0
x10
X
Transcribed Image Text:A chemist dissolves 874. mg of pure sodium hydroxide in enough water to make up 90. mL of solution. Calculate the pH of the solution. (The temperature of the solution is 25 °C.) Be sure your answer has the correct number of significant digits. 0 x10 X
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