2019 Competition


Individual Round, Chemistry of Cleaning, Chemistry of Art, Chemistry of Oceans, Team Round, Breaking Bonds

 Individual Round

This exam may test a broad set of general chemical concepts, requiring both numerical answers or written justification. The span of topics will closely follow that of the individual exams from WUCT 2018, but condensed into a single 1-hour exam.

Corrections (for "2019 Solution")
  • 6c) Ester resonance is also possible
  • 5c) Due to notation issues L4*(L2- T)-1 will also be accepted
  • 2a) Silver (I) Diammine and Diammine silver (I) are also accepted
  • 2d) In reality a carboxylate will be deprotonated and the example reaction given is wrong. Both the answers with COOH and COO- will be accepted.
  • 3a) Remove “an odd number of electrons” from answer key as diradicals exist.

1st Place
Yannik Singh

 2nd Place
Iris Yan

 3rd Place
Alec Zhu

4th Place
Andrew Wu

5th Place
Anu Chemparathy

6th Place
Jenny Zhao

7th Place
Max Guo

8th Place
Robbie Ge

9th Place
Zhuoyuan Li

10th Place
Allen Ding

11th place
Varun Chheda

12th Place
Jenny Cai

13th Place
Sruthi Parthasarathi

14th Place
Richard Yin

15th Place
Benjamin Tang

2019 Sample Problems

2019 Sample Solutions

2019 Solution

 Chemistry of Cleaning

A group of two students will work together on this exam. The topic exam centered around cleaning will focus on the incorporation of chemistry into daily and industrial cleaning agents with the end goal of educating students on how these ubiquitous objects work from a chemical perspective.

Corrections (for "2019 Solution")
  • 2.b Also accepted UV/Blue/green
  • 4.e. Answer should read “It has a polar CO dipole but also hydrophobic methyl groups making it versatile in dissolving both polar and non-polar substances.”

1st Place
Carmel High School 1

 2nd Place
Park Tudor 1

 3rd Place
Carmel High School 2

4th Place
H. Vanadium Team

5th Place
H. Cobalt Team

2019 Sample Problems

2019 Sample Solutions

2019 Solution

 Chemistry of Art

A group of two students will work together on this exam. Introductory chemical principles will be applied to various mediums of art. Prior knowledge of drawing, painting, sculpting, etc. will not be required to successfully complete this exam.

Corrections (for "2019 Solution")
  • 1.b.v. Also accepted -0.38 as reduction potential
  • 2.3.iii answer key correction: “K = e5840 = extremely large”
  • 2.h Also accepted: Over a thousand years, there would still remain a significant amount of C-14 compared to pre-1945, so the technique can still be used with about equal effectiveness.
  • 4.a.ii answer key correction: “Cu(s) + Cl-(aq) → CuCl(s) + e-
  • 4.b.i. Also accepted 2H+ + 2Cl- in place of 2HCl

1st Place
Park Tudor 1

 2nd Place
H. Lanthanum Team

 3rd Place
Carmel High School 1

4th Place
H. Vanadium Team

5th Place
H. Silicon Team

2019 Sample Problems

2019 Sample Solutions

2019 Solution

 Chemistry of Oceans

A group of two students will work together on this exam. This exam will test basic chemical principles as they relate to the chemistry of marine environments, including but not limited to its constituents, ecology, and climate change.

1st Place
Buckeye Team

 2nd Place
Park Tudor 1

 3rd Place
H. Iridium Team

4th Place
Carmel High School 1

5th Place
The Altamont School

2019 Sample Problems

2019 Sample Solutions

2019 Solution

 Team Round

Like the individual round, this exam may test a broad set of general chemical concepts. As all six students are allowed to work on this exam, though, the questions will require more in-depth interrogation of the ideas behind each problem. Sample problems are from WUCT 2018, but the exam format and topics covered will be similar.

Corrections (for "2019 Solution")
  • 3ai: The numerator and denominator for Q should be flipped. The final answer should be -16.9 kJ.
  • 4f: Answer should be \(ln(k) = -\frac{\Delta H}{RT} + \frac{\Delta S}{R} \)

1st Place
Park Tudor 1

 2nd Place
Carmel High School 1

 3rd Place
Buckeye Team

4th Place
Carmel High School 2

5th Place
H. Lanthanum Team

6th Place
H. Selenium Team

7th Place
H. Iridium Team

8th Place
The Altamont School

9th Place
Clayton High School

10th Place
Zionsville Community High School

2019 Sample Problems

2019 Sample Solutions

2019 Solution

 Breaking Bonds

Each team will choose a packet of 3 questions of a certain level of difficulty (easy, medium, hard) to answer at a time. Upon completion of the questions, the entire packet will be turned in and a new question set can be chosen, at any difficulty level. These questions will be drawn from a broad range of general chemistry topics. Sample problems are from WUCT 2018, but the exam format and topics covered will be similar.

1st Place
Buckeye Team

 2nd Place
Park Tudor 1

 3rd Place
Carmel High School 1

4th Place
H. Selenium Team

5th Place
Troy High School 1

6th Place
H. Lanthanum Team

7th Place
Carmel High School 2

8th Place
Ladue Horton Watkins High School

9th Place
Palo Alto High School

10th Place
Park Tudor 2

2018 Sample Problems

2018 Sample Solutions

2019 Easy Packet

2019 Medium Packet

2019 Hard Packet

2019 Easy Packet Answer

2019 Medium Packet Answer

2019 Hard Packet Answer