You mix solution A with solution B in a beaker. Which of the following observations does not help you prove that a chemical reaction has occurred?

Solution A, solution B, and the mixture are all yellow.

You see gas bubble out of solution

None of the above; all help prove that a chemical reaction has occurred.

Which equation is not balanced?

H 2 + H 2 + O 2 → H 2 O + H 2 O

Chemical equations must be balanced to satisfy _____.

the law of conservation of mass.

the law of multiple proportions.

the law of definite proportions.

Which equation below violates the law of conservation of mass?

Na 2 CO 3 +HCl→2NaCl+H 2 O+CO 2

To balance a chemical equation, you must

adjust the number of reactants.

Which of the following is true regarding the law of conservation of mass?

It dictates that the number of atoms of each element must be the same on both sides of a chemical equation.

It does not apply to chemical reactions.

It states that the mass of the reactants must remain constant in order for a chemical reaction to proceed.

It dictates that the number of molecules on each side of a chemical equation must be the same.

The activity series helps to predict

whether or not a specific chemical reaction is possible.

the amount of product formed by a chemical reaction.

the amount of energy needed to start a chemical reaction.

the coefficients needed to balance a chemical reaction.

What does a triangle symbol over an arrow in a chemical reaction mean?

Heat is supplied to the reaction.

A catalyst is ______.

the product of a combustion reaction.

one of the reactants in a single-replacement reaction.

In order for the reaction 2Al+6HCl→2AlCl 3 +3H 2 to occur, which of the following must be true?

Al must be above H on the activity series.

Heat must be supplied for the reaction.

Al must be above Cl on the activity series.

In a chemical reaction

the mass of the reactants equals the mass of the products.

the mass of the products is greater than the mass of reactants.

the number of atoms in the reactants and products must change.

d. energy as heat must be added to the reactants.

Which observation does not indicate that a chemical reaction has occurred?

change in total mass of substances

The word equation solid carbon + oxygen →gas carbon dioxide gas + energy, represents a chemical reaction because

CO 2 has chemical properties that differ from those of C and O.

CO 2 is a gas and carbon is a crystal.

In the chemical equation 2Mg(s) + O 2 (g) → 2MgO(s)

Mg represents the reactant magnesium

Mg represents the product magnesium.

O 2 represents the product oxygen gas.

Chapter 8 Chemical Equations and Reactions Review

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10th - 12th Grade

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Practice Problem

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Hard

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NGSS

HS-PS1-7, HS-PS1-1, HS-PS1-2

Standards-aligned

Charles Martinez

FREE Resource

51 questions

Show all answers

MULTIPLE CHOICE QUESTION

3 mins • 1 pt

Using the activity series, predict which of the following reactions can occur.

2Cr(s) + SnCl₄(aq)

Na(s) + KBr(aq)

2Na(s) + CdCl₂

Two of these can occur

MULTIPLE CHOICE QUESTION

3 mins • 1 pt

Using the activity series, determine which of the following reactions is possible.

Cr + SnCl₄

Na +KBr

Na + CdCl₂

two of these can occur

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

The equation H₃PO₄ + 3KOH → K₃PO₃ + 3H₂O is an example of which type of reaction?

double-replacement reaction

decomposition reaction

single-replacement reaction

combination reaction

MULTIPLE CHOICE QUESTION

3 mins • 1 pt

What will be the result of the reaction described by the following chemical equation? PCl₅(g) ↔ PCl₃(g) + Cl₂(g)

a mixture of PCl₃(g) and Cl₂(g) only

PCl₅(g) only

a mixture of PCl₅(g) and PCl₃(g) only

a mixture of PCl₅(g), PCl₃(g), and Cl₂(g)

What are the correct formulas and coefficients for the products of the following double-replacement reaction? RbOH + H₃PO₄ -->

H₃Rb + PO₄OH

Rb₃PO₄ + 3H₂O

RbPO₄ + 2H₂O

Rb(PO₄)_{3 +} H₂O

When a slightly soluble solid compound is produced in a double-displacement reaction, a

combustion reaction takes place.

halogen is produced.

gas bubbles off

precipitate is formed.

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

When the equation Fe +Cl→ FeCl is balanced, what is the coefficient for Cl?

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Chapter 8 Chemical Equations and Reactions Review

51 questions

Using the activity series, predict which of the following reactions can occur.

Using the activity series, determine which of the following reactions is possible.

The equation H₃PO₄ + 3KOH → K₃PO₃ + 3H₂O is an example of which type of reaction?

What will be the result of the reaction described by the following chemical equation? PCl₅(g) ↔ PCl₃(g) + Cl₂(g)

What are the correct formulas and coefficients for the products of the following double-replacement reaction? RbOH + H₃PO₄ -->

When a slightly soluble solid compound is produced in a double-displacement reaction, a

When the equation Fe +Cl→ FeCl is balanced, what is the coefficient for Cl?

You mix solution A with solution B in a beaker. Which of the following observations does not help you prove that a chemical reaction has occurred?

Which of the following equations represents the balanced equation for the reaction of iron and oxygen?

a reaction in which a single compound is broken down into simpler substances

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Chapter 8 Chemical Equations and Reactions Review

51 questions

Using the activity series, predict which of the following reactions can occur.

Using the activity series, determine which of the following reactions is possible.

The equation H3PO4 + 3KOH → K3PO3 + 3H2O is an example of which type of reaction?

What will be the result of the reaction described by the following chemical equation? PCl5(g) ↔ PCl3(g) + Cl2(g)

What are the correct formulas and coefficients for the products of the following double-replacement reaction? RbOH + H3PO4 -->

When a slightly soluble solid compound is produced in a double-displacement reaction, a

When the equation Fe +Cl→ FeCl is balanced, what is the coefficient for Cl?

You mix solution A with solution B in a beaker. Which of the following observations does not help you prove that a chemical reaction has occurred?

Which of the following equations represents the balanced equation for the reaction of iron and oxygen?

a reaction in which a single compound is broken down into simpler substances

Create a free account and access millions of resources

Similar Resources on Wayground

Popular Resources on Wayground

Discover more resources for Chemistry

The equation H₃PO₄ + 3KOH → K₃PO₃ + 3H₂O is an example of which type of reaction?

What will be the result of the reaction described by the following chemical equation? PCl₅(g) ↔ PCl₃(g) + Cl₂(g)

What are the correct formulas and coefficients for the products of the following double-replacement reaction? RbOH + H₃PO₄ -->