Balancing Chemical Equations Concepts

The video tutorial explains how to balance the chemical equation K + N2 = K3N. It begins by counting the atoms on each side of the equation, noting the imbalance between potassium and nitrogen atoms. The instructor demonstrates how to balance the equation by adjusting coefficients, turning odd numbers into even ones. The final balanced equation is achieved by ensuring equal numbers of potassium and nitrogen atoms on both sides. The video concludes with a discussion on the states of matter for the reactants and products, identifying potassium as a solid, nitrogen as a gas, and potassium nitride as a solid.

What are the initial counts of potassium and nitrogen atoms on the reactant side of the equation?

• One potassium and one nitrogen atom

• Three potassium and two nitrogen atoms

• Two potassium and one nitrogen atom

• One potassium and two nitrogen atoms

What is the first step to balance an equation with an odd number of atoms?

• Add more reactants

• Remove some products

• Add a catalyst

• Change the odd number to an even number

How do you achieve an even number of nitrogen atoms in the equation?

• Remove some nitrogen gas

• Add more nitrogen gas

• Use a coefficient of three

• Use a coefficient of two

What coefficient is used in front of K3N to balance the equation?

• One

• Four

• Two

• Three

What is the state of matter for potassium in the balanced equation?

• Solid

• Aqueous

• Liquid

• Gas

What is the final state of the product K3N in the balanced equation?

• Aqueous

• Solid

• Liquid

• Gas