To Do… Electronic homework (Lon-Capa)

HW5 Type 1 due Monday, March 17 by 7 pm; HW5 Type 2 due Wednesday, March 19 by 7 pm

Exam 2 review: due Wednesday, March 19 by 7pm

Tuesday’s lecture: Stoichiometry Workshop

Exam #2: Thursday, March 20, 7 pm

Review Sessions Tuesday, March 18

100 Noyes Lab 7:00-8:50 pm

Wednesday, March 19 Room: TBA Time: TBA

Clicker Question When lead(II) nitrate

and potassium iodide are mixed, what precipitate will form?Pb(NO3)2(aq) + KI(aq) →

A) KNO3

B) KIC) Pb(NO3)2

D) PbI2E) No precipitate will form.

Solubility Rules1. Most nitrate salts are soluble.2. Most salts of sodium,

potassium, and ammonium cations are soluble.

3. Most chloride and iodide salts are soluble. Exceptions: Ag+ and Pb2+.

4. Most sulfate salts are soluble. Exceptions: Ca2+, Ba2+, and Pb2+.

5. Most hydroxide salts are only slightly soluble. Soluble ones are: Na+, K+, and Ca2+.

6. Most sulfide, carbonate, and phosphate salts are only slightly soluble.

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Stoichiometry Problem

a) What volume of KI solution do you need to completely react with Pb(NO3)2?

b) What is the mass of solid produced?

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Stoichiometry ProblemTo react 10.0 g of hydrogen gas, what volume of oxygen gas would you need at 1.05 atm and 22°C?

2H2(g) + O2(g) 2H2O(g)

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Clicker QuestionWhich of the following reaction mixtures would produce the greatest amount of product, assuming all went to completion? Each involves the reaction symbolized by the equation:

N2(g) + 3H2(g) → 2NH3(g)

A) 3 moles of N2 and 3 moles of H2

B) 1 mole of N2 and 6 moles of H2

C) 1 mole of N2 and 3 moles of H2 D) Each would produce the same amount of product.

2 mol NH3

2 mol NH3

2 mol NH3

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