Pre Ap Chemistry Homework 8a

AP Chem HW 8-A Answers 1. The coefficients in the balanced reaction relate the rate of disappearance of reactants to the rate of production of products. From the balanced reaction, the rate of production of P 4 will be 1/4 the rate of disappearance of PH 3 , and the rate of production of H 2 will be 6/4 the rate of disappearance of PH 3 . By convention, all rates are given as positive values. Rate = s L) mol/2.0 0.048 ( t ] PH [ 3 − − Δ Δ − = = 2.4 × 3 10 − mol/L•s t Δ ] PH [ Δ 4 1 t Δ ] P [ Δ 3 4 − = = 2.4 × 3 10 − /4 = 6.0 × 4 10 − mol/L•s t Δ ] PH [ Δ 4 6 t Δ ] H [ Δ 3 2 − = = 6(2.4 × 3 10 − )/4 = 3.6 × 3 10 − mol/L•s 2. Using the coefficients in the balanced equation to relate the rates: t ] N [ 2 t ] NH [ and t ] N [ 3 t ] H [ 2 3 2 2 Δ Δ − Δ Δ Δ Δ Δ Δ = = t ] NH [ 2 1 t ] H [ 3 1 : So 3 2 Δ Δ Δ Δ − = or t ] H [ 3 2 t ] NH [ 2 3 Δ Δ − Δ Δ = Ammonia is produced at a rate equal to 2/3 of the rate of consumption of hydrogen. 3. 0.0120/0.0080 = 1.5; reactant B is used up 1.5 times faster than reactant A. This corresponds to a 3 to 2 mole ratio between B and A in the balanced equation. 0.0160/0.0080 = 2; product C is

Welcome to Mrs. Durham's PreAP Chemistry Class.

Mon 2/26 Problem Solving Lab: Astronaut Snacks- intro with preliminary report due end of dy

Homework: Set up a Google Doc for you and your partner’s lab report. Work on lab report. You can do the problem and start the material list.

Tues 2/27 Work on gathering data

Homework: Work on lab report.

Wed 2/28 Work on gathering data

Homework: Work on lab report.

Thurs 3/1 Last day to work on lab 

Homework: Finish up lab report.

Fri 3/2 Tues 2/27 Notes 12.1

Homework: Read and outline page 423 - 432. Do Not write the formulas with “k”s in them, we will be adding the correct ones as we go through the notes. Do # 1 – 4 on page 425 and #1 – 4 on page 428.

Mon 3/5 Notes 12.2

Homework: Read and outline page 433 - 435. Do # 1 – 4 on page 431, #5 – 7 and 12 on page 432 and #1 – 4 on page 435.

Tues 3/6 Notes 12.3 Ideal 

Homework: worksheet 1A

Wed 3/7 Quiz over 1st four gas laws and go over homework.

Homework:  Gas Law Problems from Problem Solving Workbook.

Thurs 3/8 Notes 12.3 – Graham's Law, Dalton’s and stoichiometry

Homework: Page 438 #1 – 3 and TOP of page 442 #1 – 3 Practice Problems.

Fri 3/9 Graham’s Law Lab

Homework: Finish Lab

Mon 3/12 Go over homework 

Homework: Page 445 – 448 # 13, 14, 17, 19, 21, 25, 28, 32, 35, 42, 48, 52, 58, 60, 69, and 70.

Tues 3/13 Go over review and Jeopardy

Homework: math crossword.

Wed 3/14 Go over crossword and Jeopardy

Homework:  vocabulary crossword and study for test

Thur 3/15 Chapter 12 Test

Homework: Read and outline page 453 – 459. Do # 2, 4, 6, and 11 on page 459.

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