Balancing Chemical Equations and Types of Reactions

Balancing Chemical Equations and Types of Reactions

Assessment

Flashcard

Chemistry

10th Grade

Hard

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15 questions

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1.

FLASHCARD QUESTION

Front

What is a combustion reaction?

Back

A combustion reaction is a chemical reaction that occurs when a substance combines with oxygen, releasing energy in the form of light and heat. Example: C2H4 + 3 O2 → 2 CO2 + 2 H2O.

2.

FLASHCARD QUESTION

Front

What are common signs that a chemical change has occurred?

Back

Common signs include a change in color, the production of gas (bubbling), and a change in temperature.

3.

FLASHCARD QUESTION

Front

How does heating affect the rate of a chemical reaction?

Back

Heating usually increases the rate of a chemical reaction, causing it to happen faster.

4.

FLASHCARD QUESTION

Front

What is the rule for balancing chemical equations?

Back

When balancing equations, you can only add, change, or remove coefficients, not subscripts or elements.

5.

FLASHCARD QUESTION

Front

What is a coefficient in a chemical equation?

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.

6.

FLASHCARD QUESTION

Front

What is the difference between a reactant and a product?

Back

Reactants are the starting substances in a chemical reaction, while products are the substances formed as a result of the reaction.

7.

FLASHCARD QUESTION

Front

What is a synthesis reaction?

Back

A synthesis reaction is a type of chemical reaction where two or more simple substances combine to form a more complex product. Example: A + B → AB.

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