Balancing Equations Exit Ticket

Front

What is the purpose of balancing chemical equations?

Back

To ensure that the number of atoms of each element is the same on both sides of the equation, adhering to the law of conservation of mass.

Front

Define 'coefficient' in the context of chemical equations.

Back

A coefficient is a number placed in front of a chemical formula in an equation to indicate how many molecules or moles of that substance are involved in the reaction.

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What does a subscript indicate in a chemical formula?

Back

A subscript indicates the number of atoms of an element in a molecule. For example, in H₂O, the '2' indicates there are two hydrogen atoms.

Front

How do you determine the missing coefficient in a chemical equation?

Back

By balancing the number of atoms of each element on both sides of the equation, adjusting coefficients as necessary.

Front

What is the balanced form of the equation: _Fe₂O₃ + _C → _Fe + _CO₂?

Back

2Fe₂O₃ + 3C → 4Fe + 3CO₂.

Front

What is the first step in balancing a chemical equation?

Back

Identify the number of atoms of each element present in the reactants and products.

Front

What is the significance of the law of conservation of mass in balancing equations?

Back

It states that matter cannot be created or destroyed in a chemical reaction, so the mass and number of atoms must remain constant.

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What is the balanced form of the equation: _H₃PO₄ → _H₄P₂O₇ + _H₂O?

Back

2H₃PO₄ → H₄P₂O₇ + 2H₂O.

Front

What does it mean if an equation is already balanced?

Back

It means that the number of atoms of each element is equal on both sides of the equation, and no coefficients need to be changed.

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How can you check if a chemical equation is balanced?

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By counting the number of atoms of each element on both sides of the equation and ensuring they are equal.