4 Chem 13 News/May 2013

Fun mole maze Susan Kelso and Jean Hein Chem 13 News, University of Waterloo, ON Not only is the mole our chemistry mascot, it is a fundamental unit of matter. One mole contains 6.022×1023 of whatever is being measured. It is often a challenge for students to understand that the mole provides a way of measuring matter. The maze puzzle on the next page focuses on the mole with concepts such as molar ratios, gas laws, and solutions. It is a good review for grade 11 and a nice refresher for those in grade 12. The Periodic Table Project electronic app was used as the source for the molar masses. Begin at one of the two starting locations (Start 1 and 2) and work through the questions to reach the finish space (Finish). Periodic table shower curtain is this month’s prize In each space there is a question that continues from that statement in the start box. — see page 19. For example: “Is there one mole of… Lithium atoms in 6.022×1023 atoms of Li?” If the content of hexagon equals one mole, follow the “true” arrow marked with a “T”. If it does not equal one mole, follow the “false” arrow marked with a “F”. Continue until the Finish is reached. At the bottom of the puzzle, students can record their “T” or ”F” paths in the space provided. Send in your students’ answers, and, for each entry, their teacher’s name will be entered into a draw. Teachers need only include the order of true and false answers that students followed to get to the finish — see bottom of puzzle. The prize is the coveted Periodic Table shower curtain donated by Educational Innovations. Go to www.teachersource.com for more about this prize. The deadline is on or before September 30, 2013. Send your students’ solutions to: Chem 13 News, Fun mole maze, Department of Chemistry, University of Waterloo, Waterloo ON N2L 3G1, Canada; Fax: 519-888-9168; or email: kjackson@uwaterloo.ca.

Note: this is a staged photo. In all laboratory settings goggles are recommended.

May 2013/Chem 13 News 7

Fun mole maze

IDEAS THAT WORKCombining academic studies with co-op experience

Chanèle Polenz is combining academic studies with

real-world experience in the co-op education program.

Chanèle has held work term positions in a medical

isotope facility, and at a molecular biology lab at Health

Canada. Her current study term includes assisting with

research in mitochondrial disease. This will all lead to

graduate studies and a career in medical research.

Whether searching for the causes of disease, building

business leadership skills, or developing sustainable

energy solutions, you’ll fi nd it all at the University of

Waterloo. uwaterloo.ca

I D E A S S TA R T H E R E – I D E A S T H AT C H A N G E T H E W O R L D

“My goal is to explore how and

why things go wrong in living

organisms. I chose University

of Waterloo Science as the best

school to fi nd innovative, non-

traditional approaches. And I knew

that co-op would let me experience

di� erent paths before I graduate.”

- CHANÈLE POLENZ, 3RD YEAR BIOCHEMISTRY, FACULTY OF SCIENCE

C9

074

96

4 Chem 13 News/May 2013

Fun mole maze Susan Kelso and Jean Hein Chem 13 News, University of Waterloo, ON Not only is the mole our chemistry mascot, it is a fundamental unit of matter. One mole contains 6.022×1023 of whatever is being measured. It is often a challenge for students to understand that the mole provides a way of measuring matter. The maze puzzle on the next page focuses on the mole with concepts such as molar ratios, gas laws, and solutions. It is a good review for grade 11 and a nice refresher for those in grade 12. The Periodic Table Project electronic app was used as the source for the molar masses. Begin at one of the two starting locations (Start 1 and 2) and work through the questions to reach the finish space (Finish). Periodic table shower curtain is this month’s prize In each space there is a question that continues from that statement in the start box. — see page 19. For example: “Is there one mole of… Lithium atoms in 6.022×1023 atoms of Li?” If the content of hexagon equals one mole, follow the “true” arrow marked with a “T”. If it does not equal one mole, follow the “false” arrow marked with a “F”. Continue until the Finish is reached. At the bottom of the puzzle, students can record their “T” or ”F” paths in the space provided. Send in your students’ answers, and, for each entry, their teacher’s name will be entered into a draw. Teachers need only include the order of true and false answers that students followed to get to the finish — see bottom of puzzle. The prize is the coveted Periodic Table shower curtain donated by Educational Innovations. Go to www.teachersource.com for more about this prize. The deadline is on or before September 30, 2013. Send your students’ solutions to: Chem 13 News, Fun mole maze, Department of Chemistry, University of Waterloo, Waterloo ON N2L 3G1, Canada; Fax: 519-888-9168; or email: kjackson@uwaterloo.ca.

Note: this is a staged photo. In all laboratory settings goggles are recommended. May 2013/Chem 13 News 7

Fun mole maze

May 2013/Chem 13 News 5

START #1 Is there exactly one mole of…

ly…

Iron in

55.85 atoms of Fe?

T

T

T

F

T

Gold in

0.10642 kg of Au?

T

Lithium atoms in 6.022×1023 atoms of Li?

D in

2A + B → 4C + D

A = 1 mol

B = 1mol F

T T

T

T

T

T

Oxygen atoms in 1.204×1024 molecules of

O2?

O xygen atom s

in ?2 mol of water

Hydrogen atoms

in 2 m ol of water

FINISH!

Hydroxide ions in

1.0 mol of

Cu(OH)2?

Ammonia molecules in

17.04 g of NH 3?

ions in

HCl(aq) in

100.0 mL of 0.50 M HCl?

Carbon atoms in one mol of

graphite?

AgCl in

128.02 g of AgCl?

s

Tin in

47.87 g of Ti?

START #2

Is there exactly one mole of…

Nitrogen in

28.02 g of liquid nitrogen?

Mg 2+ in

24.31 g of

Mg 2+?

Fe?

T

Electrons in

6.022×10 22 atoms of Ne?

TT

Sodium in1.0 g of Na?

H+ in 1.0 L of 1.0 M

H2SO4 solution?

T at

of

T a

f

Zinc in 65.39 g of Zn?

TTTn?

LiF in12 g of LiF?

T

Nickel in 1 mol of melted Ni?

Iron(III) oxide in 0.15970 kg of

Fe2O3?

O2 in 22.4 L of O 2 gas at

STP?

!!

Neutrons in 4.856×10 21 atoms

of 206Pb?

KCN in 65.03 g of KCN ?

IroIro

Helium in22.4 L of He gas at

STP?

22

Tungsten in 1.0 kg of W?

28

Carbon atoms in 6.022×1023 molecules of carbon dioxide?

66.0022×molecules of molecules of molecules of

on a×10

Carbo6 022×

13C in 13.0 g of 13C?

Hydrogen in1.5055×1023

molecules of CH4?

TT

Bonds in 0.50 mol of

methane?

T

??0

H1

T

Water in 18.03 cm3 of H2O?

Dogs in a group of

6.022×1023 dogs?

Is tn

N

Ison

Na ions in 5.0 L of 0.2 M

NaOH?

22ms

Carbon atoms in 12.011 g

graphite?

Cin

Sodium atoms in 1 mol of

sodium sulfate?

N4.856

Sodium in 1 mol of table salt ?

C in

A + 3B → C + 3D?

A = 1 mol

B= 3mol

N2 in

6.022 L of N 2 gas at STP?

T

T

TT

T

T T

F

F

T

F

T

F

T

TF

F

F

T

T

F

T

F

F

T

TF

F

F

T

F

F

F

F

F

F

FTF

A inA + 2B → 3C + 2D

C = 2 mol D = 3 mol

F F

F

F

T

F

F

T

F

FF

F

T

TT

T

T

T

T

T

T

T

F

F

F

F

F

F

F

T

T

F

D T

T F

Sodium ions in

1 L of 1 M sodium

carbonate?

Start 1 __ __ __ __ __ __ __ __ __ __ __ __ TStart 2 __ __ __ __ __ __ __ __ __

?

?

?