Chemical Equations And Reactions

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Stephanie Earhart
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1. Which of the following reactions involves the ions of two compounds exchanging places to form two new compounds?

Explanation

AX + BY --> AY + BX

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About This Quiz
Chemical Equations And Reactions - Quiz

This quiz is a review for the unit exam. If you do well on this, you will pass the exam.

2. According to the law of conservation of matter, the total mass of all the reacting substances is -

Explanation

Matter cannot be created or destroyed, it is conserved.

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3. Which of the following reactions involves one element replacing an element in a compound that is from the same activity series?

Explanation

If only one element is being replaced, it is a single-replacement reaction.

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4. Which of the following reactions involves a single compound producing two or more simpler substances?

Explanation

When you have a single substance breaking down into simpler substances, it is decomposing.

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5. Which equation represents a precipitation reaction?

Explanation

A precipitation reaction is one that produces a solid. Look at the symbols for the products.

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6. Which of the following reactions involves two or more substances combining to form a new compound?

Explanation

The substances are combining to make something new. This is the definition of a synthesis reaction.

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7. What would you observe during a precipitation reaction?

Explanation

A precipitation reaction produces a solid.

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8. When an acid decomposes, what are the products?

Explanation

H2SO4 --> SO3 + H2O

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9. Predict the products of this reaction.

Explanation

Sodium is the only metal, so there is no single-replacement reaction. Think about a balanced equation.

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10. Which coefficients are required to correctly balance the equation?

Explanation

Make sure each type of atom is equal on both sides.

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11. Predict the outcome of the reaction where zinc metal is added to a solution of potassium chloride.

Explanation

Zinc is below potassium in the Activity Series so it would not replace potassium.

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12. By predicting the outcome of the following reactants mixing together in an aqueous solution, what type of reaction will take place?

Explanation

You can tell by looking at the reactants that this is set up as AX + BY --> . This indicates a double-replacement reaction.

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13. A student performing an investigation of chemical reactions mixes two aqueous solutions and observes a change in color. Color change is most indicative of which type of chemical reaction?

Explanation

Neutralization and acid-base are pretty much the same thing. There may not be any color change with this reaction. A precipitation reaction will turn cloudy, but not necessarily a color change. A color change usually indicates an oxidation-reduction reaction. Think about a nail rusting.

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14. After the correct formula for a reactant in an equation has been written, the -

Explanation

Remember that if you alter the chemical formula, you have changed the substance.

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15. Which equation represents a neutralization reaction?

Explanation

A neutralization reaction involves and acid and a base.

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Which of the following reactions involves the ions of two compounds...
According to the law of conservation of matter, the total mass of all...
Which of the following reactions involves one element replacing an...
Which of the following reactions involves a single compound producing...
Which equation represents a precipitation reaction?
Which of the following reactions involves two or more substances...
What would you observe during a precipitation reaction?
When an acid decomposes, what are the products?
Predict the products of this reaction.
Which coefficients are required to correctly balance the equation?
Predict the outcome of the reaction where zinc metal is added to a...
By predicting the outcome of the following reactants mixing together...
A student performing an investigation of chemical reactions mixes two...
After the correct formula for a reactant in an equation has been...
Which equation represents a neutralization reaction?
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