Call Now to Set Up Tutoring:

(888) 888-0446

AP Chemistry : Chemical Reactions

Study concepts, example questions & explanations for AP Chemistry

Create An Account

All AP Chemistry Resources

6 Diagnostic Tests 225 Practice Tests Question of the Day Flashcards Learn by Concept

Example Questions

Example Question #1 : Net Ionic Equations

What is the net ionic equation for the reaction that occurs when sodium chloride is mixed with silver nitrate.

Possible Answers:

Ag⁺(aq) + Cl^- (aq) -> AgCl (s)

NaCl (aq) + AgNO3 (aq) -> NaNO₃ (aq) + AgCl (aq)

NaCl (aq) + AgNO₃ (aq) -> NaNO₃ (s) + AgCl (aq)

NaCl (aq) + AgNO₃ (aq) -> NaNO₃ (aq) + AgCl (s)

Na⁺ (aq) + NO₃^- (aq) -> NaNO₃ (s)

Correct answer:

Ag⁺(aq) + Cl^- (aq) -> AgCl (s)

Explanation:

Only the Ag and Cl ions are reacting to form solid silver chloride.

Report an Error

Example Question #1 : Net Ionic Equations

What is the net ionic equation that occurs when sodium chloride is mixed with potassium nitrate?

Possible Answers:

Na⁺ (aq) + NO₃^- (aq) -> NaNO₃ (s)

NaCl (aq) + KNO₃ (aq) -> NaNO₃ (s) + KCl (aq)

No Reaction

NaCl (aq) + KNO3 (aq) -> NaNO₃ (aq) + KCl (aq)

NaCl (aq) + KNO₃ (aq) -> KNO₃ (aq) + KCl (s)

Correct answer:

No Reaction

Explanation:

Since no precipitation is predicted by the solubility rules, there will be no reaction.

Report an Error

Example Question #1 : Net Ionic Equations

What is the net ionic reaction when potassium carbonate is mixed with Calcium bromide?

Possible Answers:

Ca²⁺ (aq) + CO₃^2- (aq) -> CaCO₃(s)

2 K₂CO₃ (aq) + CaBr₂(aq) -> 2 KBr (s) + CaCO₃(aq)

2 K₂CO₃ (aq) + CaBr₂ (aq) -> 2 KBr (aq) + CaCO₃(s)

2 K⁺ (aq) + Br^- (aq) -> 2 KBr (s)

2 K₂CO₃ (aq) + CaBr₂ (aq) -> 2 KBr (aq) + CaCO₃(aq)

Correct answer:

Ca²⁺ (aq) + CO₃^2- (aq) -> CaCO₃(s)

Explanation:

Only the calcium and carbonate ions are reacting according to the solubility rules to form calcium carbonate.

Report an Error

Example Question #2 : Net Ionic Equations

What is the net ionic reaction when a solution of Cd(NO₃)₂ is reacted with (NH₄)₂S?

Possible Answers:

NH4⁺ (aq) + NO₃^- (aq) -> NH₄NO₃ (s)

Cd(NO₃)₂ (aq) + (NH₄)₂S (aq) -> CdS (s) + 2 NH₄NO₃ (aq)

Cd(NO₃)₂ (aq) + (NH₄)₂S (aq) -> CdS (aq) + 2 NH₄NO₃(aq)

Cd²⁺(aq) + S^2- -> CdS (s)

Cd(NO₃)₂ (aq) + (NH₄)₂S (aq) -> CdS (s) + 2 NH₄NO₃(aq)

Correct answer:

Cd²⁺(aq) + S^2- -> CdS (s)

Explanation:

Only Cd and S ions are interacting according to the solubility rules to form a solid precipitant.

Report an Error

Example Question #2 : Net Ionic Equations

What is the net ionic reaction when a solution of rubidium sulfate is mixed with barium hydroxide?

Possible Answers:

No Reaction

Ba²⁺ (aq) + SO₄^2- (aq) -> BaSO4 (s)

Rb₂SO₄ (aq) + Ba(OH)₂ (aq) -> 2 RbOH (s) + BaSO₄ (aq)

Rb⁺ (aq) + OH^- (aq) -> RbOH (s)

Rb₂SO₄ (aq) + Ba(OH)₂ (aq) -> 2 RbOH (aq) + BaSO₄ (s)

Correct answer:

Ba²⁺ (aq) + SO₄^2- (aq) -> BaSO4 (s)

Explanation:

Only the Ba and sulfate ions will react according to the solubility rules.

Report an Error

Example Question #4 : Types Of Reactions

$CaCO_{3} (s) \rightarrow CaO (s) + CO_{2} (g)$

The reaction above could be classified as __________.

Possible Answers:

oxidation-reduction

decomposition

single displacement

decomposition and oxidation-reduction

synthesis

Correct answer:

decomposition

Explanation:

When one molecule is converted into two or more smaller molecules, the reaction is considered a decomposition reaction. In this example, none of the elements under go a change in oxidation number, so this is not an oxidation-reduction reaction. (Calcium is always , oxygen is always , and carbon remains throughout the reaction.)

Report an Error

Example Question #1 : Introduction For Reactions

Which of the following represents a combustion reaction?

Possible Answers:

$\small 2NaCl + 2H_{2}O \rightarrow 2NaOH + H_{2} + Cl_{2}$

$\small HCl + H_{2}O \rightarrow H_{3}O^{+} + Cl^{-}$

$\small CH_{4} + O_{2} \rightarrow CO_{2} + H_{2}O + heat$

$\small 2Cu(NO_{3})_{2} \rightarrow 2CuO + 4NO_{2} + O_{2}$

Correct answer:

$\small CH_{4} + O_{2} \rightarrow CO_{2} + H_{2}O + heat$

Explanation:

Combustion reactions always produce $\small CO_{2} + H_{2}O$ and excess heat. Depending on the molecule that is oxidized by oxygen, which in this case was methane $\small (CH_{4})$ , the ratios between $\small CO_{2}$ and $\small H_{2}O$ can vary.

Report an Error

Example Question #1 : Balancing Chemical Equations

What is the chemical formula of the salt formed when a chemist mixes solvated Potassium and Arsenic ions in solution?

Possible Answers:

$K_3As$

$KAs$

$K_2As$

$KAs_3$

$KAs_2$

Correct answer:

$K_3As$

Explanation:

Potassium is a Group I element, so to get to a filled valence shell, it will lost one electron, yielding $K^+$ .

Arsenic is a Group 5 element, so it needs to gain three electrons to obtain a filled valence shell, yielding $As^{-3}$ .

In order to balance out the charges, the resultant salt will be $K_3As$ .

Report an Error

Example Question #3 : Balancing Chemical Equations

What is the net ionic equation for the ion exchange reaction between ferrous sulfate and calcium iodide? Assume all compounds are soluble.

Possible Answers:

$Fe(SO_4)_2 + CaI_2 \rightarrow FeI_2 +Ca(SO_4)_2$

$FeSO_4 + CaI \rightarrow FeI +CaSO_4$

None of the available answers

$Fe_2SO_4 + CaI_2 \rightarrow 2FeI +CaSO_4$

$FeSO_4 + CaI_2 \rightarrow FeI_2 +CaSO_4$

Correct answer:

$FeSO_4 + CaI_2 \rightarrow FeI_2 +CaSO_4$

Explanation:

First, we must know what ferrous sulfate is. Ferrous refers to $Fe^{2+}$ , and sulfate has the formula $SO_4^{-2}$ . When we combine the two together we get FeSO_4 .

Calcium is a divatent cation and iodide is a monovalent anion, so their salt is CaI_2 . The ion exchange reaction is then:

$FeSO_4 + CaI_2 \rightarrow FeI_2 +CaSO_4$

Report an Error

Example Question #1 : Reaction Chemistry

Select the net ionic equation from this molecular reaction:

$Ba(NO_{3})_{2} (aq) + K_{2}SO_{4} (aq) \rightarrow 2KNO_{3} (aq) + BaSO_{4} (s)$

Possible Answers:

None of the other choices

$K^{+} (aq) + NO_{3}^{-} (aq) \rightarrow KNO_{3} (aq)$

$2K^{+} (aq)+SO_{4}^{2-}(aq)\rightarrow K_{2}SO_{4} (aq)$

$Ba^{2+} (aq) + SO_{4}^{2-} (aq) \rightarrow BaSO_{4} (s)$

$Ba^{2+} (aq) + 2K^{+} (aq) + SO_{4}^{2-} (aq) \rightarrow 2K^{+} (aq) + BaSO_{4} (s)$

Correct answer:

$Ba^{2+} (aq) + SO_{4}^{2-} (aq) \rightarrow BaSO_{4} (s)$

Explanation:

The net ionic equation is derived by removing all spectator ions from the total ionic equation (in which all ions are listed). To put it another way, the net ionic equation involves only the ions that participate in a reaction which, in this case, is the precipitation of barium sulfate.

Begin by writing all aqueous compounds in their dissociated (ionic) forms.

$Ba(NO_{3})_{2} (aq) + K_{2}SO_{4} (aq) \rightarrow 2KNO_{3} (aq) + BaSO_{4} (s)$

$Ba^{2+}+2NO_3^-+2K^++SO_4^{2-}\rightarrow2K^++2NO_3^-+BaSO_4(s)$

Cancel out any ions that appear in equal quantities on both sides of the equation. In this case, we can cancel the nitrate and potassium ions.

$Ba^{2+}+SO_4^{2-}\rightarrow BaSO_4(s)$

This is our net ionic equation.

Report an Error

View AP Chemistry Tutors

Leonard
Certified Tutor

Florida State University, Bachelor of Science, Environmental Science.

View AP Chemistry Tutors

Muddasir
Certified Tutor

National University of Science and Technology (NUST), Bachelor, Electrical Engineering.

View AP Chemistry Tutors

Miriam
Certified Tutor

Washington University in St Louis, Bachelor in Arts, Biology, General.

All AP Chemistry Resources

6 Diagnostic Tests 225 Practice Tests Question of the Day Flashcards Learn by Concept

Popular Subjects

Physics Tutors in Phoenix, Biology Tutors in Philadelphia, Statistics Tutors in Houston, ACT Tutors in Phoenix, Algebra Tutors in Chicago, GMAT Tutors in Dallas Fort Worth, GRE Tutors in Atlanta, ACT Tutors in Washington DC, French Tutors in Phoenix, Chemistry Tutors in New York City

Popular Courses & Classes

ISEE Courses & Classes in Los Angeles, ACT Courses & Classes in Washington DC, LSAT Courses & Classes in Dallas Fort Worth, GRE Courses & Classes in Dallas Fort Worth, Spanish Courses & Classes in Dallas Fort Worth, ACT Courses & Classes in San Francisco-Bay Area, SSAT Courses & Classes in Los Angeles, SAT Courses & Classes in Chicago, MCAT Courses & Classes in Philadelphia, ISEE Courses & Classes in Washington DC

Popular Test Prep

MCAT Test Prep in Chicago, LSAT Test Prep in Dallas Fort Worth, ACT Test Prep in Houston, LSAT Test Prep in Washington DC, SAT Test Prep in Miami, ACT Test Prep in San Francisco-Bay Area, SAT Test Prep in Washington DC, GMAT Test Prep in Atlanta, SSAT Test Prep in New York City, SSAT Test Prep in Phoenix

DMCA Complaint

If you believe that content available by means of the Website (as defined in our Terms of Service) infringes one or more of your copyrights, please notify us by providing a written notice (“Infringement Notice”) containing the information described below to the designated agent listed below. If Varsity Tutors takes action in response to an Infringement Notice, it will make a good faith attempt to contact the party that made such content available by means of the most recent email address, if any, provided by such party to Varsity Tutors.

Your Infringement Notice may be forwarded to the party that made the content available or to third parties such as ChillingEffects.org.

Please be advised that you will be liable for damages (including costs and attorneys’ fees) if you materially misrepresent that a product or activity is infringing your copyrights. Thus, if you are not sure content located on or linked-to by the Website infringes your copyright, you should consider first contacting an attorney.

Please follow these steps to file a notice:

You must include the following:

A physical or electronic signature of the copyright owner or a person authorized to act on their behalf; An identification of the copyright claimed to have been infringed; A description of the nature and exact location of the content that you claim to infringe your copyright, in \ sufficient detail to permit Varsity Tutors to find and positively identify that content; for example we require a link to the specific question (not just the name of the question) that contains the content and a description of which specific portion of the question – an image, a link, the text, etc – your complaint refers to; Your name, address, telephone number and email address; and A statement by you: (a) that you believe in good faith that the use of the content that you claim to infringe your copyright is not authorized by law, or by the copyright owner or such owner’s agent; (b) that all of the information contained in your Infringement Notice is accurate, and (c) under penalty of perjury, that you are either the copyright owner or a person authorized to act on their behalf.

Send your complaint to our designated agent at:

Charles Cohn Varsity Tutors LLC
101 S. Hanley Rd, Suite 300
St. Louis, MO 63105

Or fill out the form below:

Do not fill in this field

Contact Information

* Full legal name

Company name

* Phone number

* Email address

Address

* Address1

Address2

* City

* State

* Zipcode

* Country

Complaint Details

* URL of copyrighted work (where your original material is located)

* Please describe the copyrighted work so that it may be easily identified

I am the owner, or an agent authorized to act on behalf of the owner of an exclusive right that is allegedly infringed.

I have a good faith belief that the use of the material in the manner complained of is not authorized by the copyright owner, its agent, or the law.

This notification is accurate.

I acknowledge that there may be adverse legal consequences for making false or bad faith allegations of copyright infringement by using this process.

* Signature (your digital signature is legally binding)

HIGH SCHOOL

GRADUATE SCHOOL

K-8

Search 50+ Tests

math tutoring

science tutoring

foreign languages

elementary tutoring

other

Search 350+ Subjects

AP Chemistry : Chemical Reactions

Study concepts, example questions & explanations for AP Chemistry

All AP Chemistry Resources

Example Questions

Example Question #1 : Net Ionic Equations

Example Question #1 : Net Ionic Equations

Example Question #1 : Net Ionic Equations

Example Question #2 : Net Ionic Equations

Example Question #2 : Net Ionic Equations

Example Question #4 : Types Of Reactions

Example Question #1 : Introduction For Reactions

Example Question #1 : Balancing Chemical Equations

Example Question #3 : Balancing Chemical Equations

Example Question #1 : Reaction Chemistry

All AP Chemistry Resources

Report an issue with this question

DMCA Complaint

Contact Information

Address

Complaint Details

Email address:
Your name:
Feedback: