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Key Quiz 1 09-106 S 11

# Key Quiz 1 09-106 S 11 - Recitation CIRCLE ONE TA and ONE...

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Name ______________________________ _ Quiz 1 (10 points) 09-106 Spring 2011 Recitation ( CIRCLE ONE TA and ONE TIME ): Christian Steve Brendan 6:30 7:30 1/13/11 (10 minutes allowed) 1 In order to ensure the maximum amount of partial credit, please show all work and clearly circle your final answer for problem 1. Question 2 is on the reverse side. 1. Aqueous aluminum sulfate reacts with sodium hydroxide to form a white aluminum hydroxide precipitate according to the reaction: Al 2 (SO 4 ) 3 (aq) + 6 NaOH(aq) barb2right 3 Na 2 SO 4 (aq) + 2 Al(OH) 3 (s) What concentration (in M) of Na 2 SO 4 forms when 100.0 mL of 0.633 M NaOH is added to 500.0 mL of a 0.0374 M Al 2 (SO 4 ) 3 (aq) solution? (6 points)

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Name ______________________________ _ Quiz 1 (10 points) 09-106
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Unformatted text preview: Recitation ( CIRCLE ONE TA and ONE TIME ): Christian Steve Brendan 6:30 7:30 1/13/11 (10 minutes allowed) 2 2. Consider a monatomic ideal gas stored in an insulated (but flexible) container. Initially, the temperature is 25 o C and the volume is 0.1 L. If the gas is then expanded to 1 L against a constant external pressure: (a) the sign of w for the gas will be: positive negative zero ( circle one , 2 pts ) (b) the sign of ∆ E for the gas will be: ( circle one item below , 1 pt ) positive negative zero cannot determine from given information ( Remember: ∆ E = q + w ) (c) Circle below the formula used to calculate w for this gas expansion. w = -P ext Δ V w = -nR T ln(V f / V i ) (1 pt)...
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Key Quiz 1 09-106 S 11 - Recitation CIRCLE ONE TA and ONE...

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