Grade 10 · Science · Chemistry

10th grade Reversible reactions and dynamic equilibrium worksheet

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Reversible reactions and dynamic equilibrium

Grade 10 Science Worksheet - Building Confidence

NameDate

Circle the best answer, or write your answer on the line.

In N₂O₄ ⇌ 2 NO₂, 0.2 mol of N₂O₄ splits before equilibrium. How many moles of NO₂ form, Ari?
In N₂O₄ ⇌ 2 NO₂, 0.15 mol of N₂O₄ splits before equilibrium. How many moles of NO₂ form, Bo?
In N₂O₄ ⇌ 2 NO₂, 0.35 mol of N₂O₄ splits before equilibrium. How many moles of NO₂ form, Esme?
4.
Using the graph, when is equilibrium reached, Jun?
- By about 30 s
- At 0 s
- At 10 s
5.
Using the graph, what is true of the two rates at equilibrium, Kira?
Use the picture in question 4.
- They are equal
- Both are zero
- Forward is double
6.
Using the graph, why does the forward rate fall at first, Luz?
Use the picture in question 4.
- The flask is cooling
- Products block the arrow
- Reactants are used up
7.
What does the arrow ⇌ in an equation mean, Milo?
- It runs forward very fast
- It has stopped
- It runs both ways
8.
Which of these changes can go both ways, Noah?
- An egg being fried
- Water freezing and melting
- A log burning to ash
9.
Do the reactions stop at equilibrium, Pia?
- No: both directions continue
- Yes: everything has stopped
- Yes: one direction has ended
10.
At equilibrium, what are the amounts of reactants and products, Ren?
- Constant, not always equal
- Both falling to zero
- Exactly equal to each other

Reversible reactions and dynamic equilibrium. Every version has 10 questions, and the answer key prints on the second page.

I can say a reversible reaction (⇌) runs both ways and reaches equilibrium when the two rates are equal.
I can say amounts at equilibrium are constant, not equal, and the reactions keep running.
I can read equilibrium from a rate graph or an amounts table.
I can use coefficients to find how much forms or is left.

Standard: HS-PS1-6

reversible reaction: A reaction that runs forward and backward

equilibrium: The state where forward and reverse rates are equal

dynamic: Still moving: both reactions continue

closed system: One sealed so nothing escapes

constant: Not changing over time

Your child made one NO₂ per N₂O₄. The 2 in front of NO₂ means each N₂O₄ that splits makes two.

Your child took away the product amount instead of the reactant used. Use the equation's coefficients to turn one into the other.

Your child thought equilibrium means equal amounts. It means equal rates, so amounts stop changing but can be very different.

What is the most common mistake with reversible reactions and dynamic equilibrium?

Your child made one NO₂ per N₂O₄. The 2 in front of NO₂ means each N₂O₄ that splits makes two.

Are these 10th grade science worksheets free to print?

Yes. All 6 printable versions at each level are free to print, with the answer key, and no account is needed.

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