Balancing Equations with Poker Chips

The challenge of balancing equations

If you’ve ever found yourself struggling to convey the concept of balancing chemical equations to your students, you’re not alone. Balancing equations is a fundamental skill in chemistry, but it can be a challenging one for middle school students to grasp. Enter poker chips—a simple, colorful, and effective tool that can transform your lessons and make balancing equations a breeze.

If you’ve ever found yourself struggling to convey the concept of balancing chemical equations to your students, you’re not alone. Balancing equations is a fundamental skill in chemistry, but it can be a challenging one for middle school students to grasp. Here’s what happened to me.

Last summer, I was tutoring two rising 9th graders in chemistry. They had very little background knowledge and, with lots of visuals and manipulatives, had just mastered counting atoms. Given 8H₂SO₄, for example, they could tell me how many atoms there were of hydrogen, sulfur and oxygen.

Lots of practice later, I thought they were ready to try to balance an equation.

I wrote H₂ + O₂ -> H₂O on the board and we counted how many hydrogens were in the reactants and how many were in the product. “That’s called balanced,” I told them. “That means that we didn’t break the law of conservation of mass. But look at the oxygens.” They were able to see that there was only 1 oxygen in the products but 2 in the reactants, but were unable to see how to fix the problem.

I drew pictures – circles for hydrogen and squares for oxygen. That didn’t help. Finally, as a last resort, I handed out poker chips.

To say that solved all my problems is, of course, overly simplistic. But it was an absolute lightbulb moment for these two boys. Suddenly, they were working independently, balancing equations like superstars.

Why poker chips?

I suppose I could have used colored paperclips or marbles. But using a manipulative like a poker chip helped transform an abstract concept into a tangible activity that students can easily grasp. The different colors of the poker chips can represent different atoms, allowing students to physically manipulate and count them, which enhances their understanding of the conservation of mass. This visual and tactile approach caters to various learning styles, particularly for those who benefit from kinesthetic and visual learning methods. Additionally, using poker chips adds an element of fun and engagement to the lesson, which can boost students’ enthusiasm and participation.

Setting Up

When you’re ready to try this with your own students, you’ll need a bunch of poker chips in different colors. Depending on the equations you want your students to balance, you’ll need 10-20 chips of each color.

I also provided my students with large poster paper and markers. You could substitute with an individual white board, or even use washable markers directly on your desks to write the equations.

Have a copy of a balancing equations worksheet available for each student.

Modification: For beginning students or students who are visual learners, I draw a line under the “invisible 1” coefficient for each compound in the equation so that students know where they can write numbers.

How it works

First, have students use markers to write the unbalanced equation on their paper, white board, or desk.

Then, ask students to assign a different color poker chip to each element. Place piles of poker chips under each element in the equation to represent the atoms that are present and count to see if the equation is balanced.

If the equation is unbalanced, change the coefficient of the element that is unbalanced and adjust the poker chips to compensate.

Count again to see if the equation is balanced.

Repeat until you have balanced the equation!

Don’t forget to write the correct coefficients in your worksheet.

I do, We do, You do

A great way to teach balancing equations with poker chips is to use the I do, We do, You do method. First, demonstrate the skill yourself. Use poker chips to represent the different atoms in your equation. Identify which atoms are balanced and which are not balanced. Model brainstorming how to balance the equation, then change coefficients as you add chips to the equation. Finally, model counting the atoms in the reactants and in the products to demonstrate checking your work.

After you demonstrate at least one or two times, hand out materials and complete one or two equations with your students. There probably will be a few students who are ready to run on their own, and there probably will be a few students who need a little more hand holding. Adjust as needed until everyone is ready to practice on his or her own.