Balancing Chemical Equations

The video tutorial explains the process of balancing a decomposition reaction involving magnesium nitrate. It begins by counting the atoms on both the reactant and product sides, focusing on magnesium, nitrogen, and oxygen. The tutorial then demonstrates how to balance the equation by adjusting coefficients, starting with oxygen and then moving to magnesium and nitrogen. The instructor uses experience and intuition to achieve a balanced equation, providing a step-by-step approach to solving this chemical equation.

What type of reaction is magnesium nitrate undergoing in the video?

• Double replacement reaction

• Single replacement reaction

• Decomposition reaction

• Synthesis reaction

How many nitrogen atoms are present on the reactant side initially?

• Three

• Four

• Two

• One

What is the total number of oxygen atoms on the product side before balancing?

• Five

• Seven

• Six

• Three

What coefficient is placed in front of MgO to help balance the oxygen atoms?

• 2

• 1

• 4

• 3

After placing a 2 in front of MgO, how many total oxygen atoms are there on the product side?

• Seven

• Six

• Five

• Four

What adjustment is made to balance the magnesium atoms?

• Add a coefficient of 4 in front of MgO

• Add a coefficient of 2 in front of MgO

• Add a coefficient of 1 in front of MgO

• Add a coefficient of 3 in front of MgO

How many nitrogen atoms are there on the product side after balancing?

• Two

• Three

• Four

• Five

What coefficient is placed in front of NO2 to balance the nitrogen atoms?

• 1

• 2

• 3

• 4

What is the final total number of oxygen atoms on both sides of the equation?

• Thirteen

• Twelve

• Eleven

• Ten

What is the final balanced chemical equation for the decomposition of magnesium nitrate?

• 2Mg(NO3)2 → 2MgO + 4NO2 + O2

• 2Mg(NO3)2 → 2MgO + 4NO2 + O2

• Mg(NO3)2 → MgO + NO2 + O2

• Mg(NO3)2 → 2MgO + 2NO2 + O2