Lecture 3 Chapter 3 and Chapter 4

# Lecture 3 Chapter 3 and Chapter 4 - Exam Room...

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Exam Room Assignments (These are also posted on our LMS site) 1110-03 DCC 318 1100-06 DCC 308 1100-10 Sage 3303 Extra Time Walker 3221 Reminder: “High School Knowledge Exam” is on Wednesday (September 9 th ) at 8am. Make sure that you bring a #2 pencil and a scientific calculator (NO Graphing Calculators Allowed)

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Chapter 3 and Chapter 4 Lecture 3 September 8, 2009
Preparing and Diluting Solutions How to prepare 1 Liter of a 2.0M aqueous solution of X: 1.weight out appropriate amount of X 2.dissolve X in ~500mL of H 2 O (solvent) in 1.0L volumetric flask (see picture on right) 3.Fill volumetric flask to mark with H 2 O (cap and invert to mix thoroughly)

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Sodium chlorate is used as an oxidizer in the manufacture of dyes, explosives and matches. Calculate the mass of solute needed to prepare 1.575 L of 0.00250 M NaClO 3 (Molar Mass = 106.45 g/mol) A. 419 g B. 169 g C. 0.419 g D. 0.169 g E. 0.00394 g
The correct method for preparing one liter of a 1.0 M solution of X is to dissolve exactly one mole of X in exactly one liter of water.

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