Laboratory Assignment For Module 3: Reaction Rates. Name:

College ID:

Thomas Edison State College

General Chemistry II with Labs (CHE-122)

Section no.:

Semester and year:

## LABORATORY REPORT

**Laboratory Assignment for Module 3: Reaction Rates
(eScience Lab 4 [16])**

### I. PURPOSE (10 POINTS)

### II. TEST DATA (15 POINTS)

**Table 1. 10 mL Undiluted IKI and 5 mL 3% H _{2}O_{2}**

Water displaced in milliliters |
Time in seconds |

2 mL | |

4 mL | |

6 mL | |

8 mL | |

10 mL | |

12 mL | |

14 mL | |

16 mL | |

18 mL | |

20 mL | |

22 mL |

_{ }

**Table 2. 10 mL 0.5–1.0% IKI and 5 mL 3% H _{2}O_{2}**

Water displaced in milliliters |
Time in seconds |

2 mL | |

4 mL | |

6 mL | |

8 mL | |

10 mL | |

12 mL | |

14 mL | |

16 mL | |

18 mL | |

20 mL | |

22 mL |

**Table 3. 10 mL 0.5–1.0% IKI and 5 mL 2.25% H _{2}O_{2}**

Water displaced in milliters |
Time in seconds |

2 mL | |

4 mL | |

6 mL | |

8 mL | |

10 mL | |

12 mL | |

14 mL | |

16 mL | |

18 mL | |

20 mL | |

22 mL |

**III.**** CALCULATIONS (20 POINTS)**

**Table 1: 10 mL Undiluted IKI and 5 mL 3% H _{2}O_{2}**

** **Slope:

Inverse Slope:

** **

**Table 2: 10 mL 0.5–1.0% IKI and 5 mL 3% H _{2}O_{2}**

Slope:

Inverse Slope:

** **

** **

**Table 3:10 mL 0.5–1.0% IKI and 5 mL 2.25% H _{2}O_{2}**

Slope:

Inverse Slope:

** **

** **

Order of H_{2}O_{2}:

Order of IKI:

Rate law constant:

*Show Calculations and Include Graphs

**IV. ****RESULTS (15 POINTS)**

Overall rate law:

** **

### IV. CONCLUSION (10 POINTS)

### V. QUESTIONS (30 POINTS)

1. How many grams of IKI (iodine-potassium iodide; molar mass = 166.0 g/mol) would it take to obtain a 100.0 mL solution of 0.300 *M* IKI? How many grams of IKI would it take to create a 100.0 mL solution of 0.600 *M* IKI? *(6 points)*

2. What is the molarity of 100.0 mL of a 3.0% H_{2}O_{2} (mass/volume) solution? What is the molarity of 100.0 mL of a 2.25% H_{2}O_{2} (mass/volume) solution? ** ***(6 points)*

3. When finding the order of H_{2}O_{2}, why was Trial 1 and Trial 3 used? *(6 points)*

4. When finding the order of IKI, why was Trial 1 and Trial 2 used? *(6 points)*

5. How does temperature affect the reaction rate? Explain in terms of the collision theory.

*(6 points)*