Balancing Chemical Equations reteach

What are you trying to do when you balance the equations?

• make the number and type of atoms on the reactant side equal the number and type of atoms on the product side

• make all the coefficients the same

• make all the subscripts the same

• make the number of molecules on the reactant side equal the number of molecules on the on product side

What element do you leave to balance until the very end?

• hydrogen

• oxygen

• carbon

• polyatomic ions

If a polyatomic ion exists on both sides you should...

• Not separate them...count them as one thing

• Count the elements within the polyatomic ion separately

• Count it as one thing on only one side but not on the other.

How many OH's do you have on the REACTANT side?

• 1

• 2

• 3

• 4

The 2 in front of the NaOH means you have....

• 2 Na and 2 OH

• 2 Na but still only 1 OH

• You shouldn't put it in front of the NaOH, but instead put it between the Na and the OH as a subscript

Are you enjoying the video lesson?

• Yes

• No

How did she get 3 Oxygens on the product side?

• there are 2 in the CO₂ and 1 in the H₂O and she added those together.

• She is wrong, there are only 2

• There is a 3 coefficient... 3H₂O

How many total oxygens will the be on the product side after she added the 2 in front of the CO₂?

• 4

• 2

• 5

• 6

What does it take to get good at chemistry?

• practice

• luck

• a rabbits foot

• a four leaf clover