Chemistry Chemistry Practice Problems Solutions Library

Molecular Equations Solutions Library

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263 solutions

Molecular Equations

Q. Which combination will produce a precipitate? A. Cu(NO3)2(aq) and KC2H3O2(aq) B. AgC2H3O2(aq) and HC2H3O2(aq)C. KOH (aq) and HNO3(aq) D. Pb(NO3)2(a...

Solved • Nov 23, 2020

Molecular Equations

Q. Write the balanced equation for the neutralization reaction between HI and Ba(OH)2 in aqueous solution.

Solved • Nov 17, 2020

Molecular Equations

Q. Complete and balance each of the following equations. If no reaction occurs, write NO REACTION. A) Example: Na3PO4(aq) + AlCl3(aq)  → NaCl(aq) + Al...

Solved • Nov 16, 2020

Molecular Equations

Q. Write formulas for the precipitates that formed:1. HCl(aq) + NaCl(aq)2. HCl(aq) + Na2CO3(aq)3. HCl(aq) + MgSO4(aq)4. HCl(aq) + NH4Cl(aq)5. HCl(aq) ...

Solved • Nov 13, 2020

Molecular Equations

Q. Write formulas for the precipitates that formed:1. NaOH (aq) + NaCl(aq)2. NaOH (aq)+ Na2CO3(aq)3. NaOH (aq) + MgSO4(aq)4. NaOH (aq)+ NH4Cl(aq)5. Na...

Solved • Nov 13, 2020

Molecular Equations

Q. Write formulas for the precipitates that formed:1. AgNO3(aq) + NaCl(aq)2. AgNO3(aq) + Na2CO3(aq)3. AgNO3 + MgSO4(aq)4. AgNO3 + NH4Cl(aq)5. AgNO3(aq...

Solved • Nov 13, 2020

Molecular Equations

Q. Which of the following pairs of aqueous solutions will form a precipitate when mixed? A. Sr(C2H3O2)2 + Na2SO4B. (NH4)2SO4 + KClC. KNO3 + LiOHD. KOH...

Solved • Nov 9, 2020

Molecular Equations

Q. Complete and balance each of the following equations. Remember to put states of matter.Pb(NO3)2(aq) + KCl(aq)NaCl(aq) + Mg(C2H3O2)2(aq)(NH4)2SO4(aq...

Solved • Nov 3, 2020

Molecular Equations

Q. A solution containing a mixture of metal cations was treated with dilute HCl and no precipitate formed. Next, H2S was bubbled through the acidic so...

Solved • Nov 2, 2020

Molecular Equations

Q. For each reaction, identify the precipitate or lack thereofCaCl2 (aq) + K2CO3 (aq) → CaCO3 + 2 KCla. CaCO3b. KClc. no precipitate

Solved • Oct 23, 2020

Molecular Equations

Q. What would be the formula of the precipitate that forms when Pb(NO3)2(aq) and K2SO4(aq) are mixed?A) PbK2B) H2OC) K(NO3)2D) PbSO4

Solved • Oct 19, 2020

Molecular Equations

Q. In the above question we see the reaction between Xe and fluorine gas F2. Interestingly, xenon has a high affinity for oxygen, and xenon fluorides ...

Solved • Jul 2, 2020

Molecular Equations

Q. Enter the compound corresponding to X in the following equation. Remember to balance the equation.Xe + 2F2 → XGroup 18 elements, or rare gases, are...

Solved • Jul 2, 2020

Molecular Equations

Q. Which substances are always produced in an acid-base neutralization reaction?A. a gasB. waterC. an acidD. a saltE. a baseAcids are substances that ...

Solved • Jul 2, 2020

Molecular Equations

Q. What salt is produced in each of the following neutralization reactions?A. HNO3(aq) + KOH(aq) → H2O(l) + ?B. HNO3(aq) + Ca(OH)2(aq) → H2O(l) + ?C. ...

Solved • Jul 2, 2020

Molecular Equations

Q. Suppose that aqueous solutions of barium nitrate and potassium carbonate are mixed. What is the name of the compound or compounds that precipitate?...

Solved • Jul 2, 2020

Molecular Equations

Q. Part C. Consider the diagram. The red spheres represent the anion and the yellow spheres the cation. Which of the following combinations of reactan...

Solved • Jul 1, 2020

Molecular Equations

Q. Lanthanum metal forms cations with a charge of 3+. Consider the following observations about the chemistry of lanthanum: When lanthanum metal is ex...

Solved • Jun 30, 2020

Molecular Equations

Q. Will a precipitate form when solutions of Ba(NO3)2 and KOH are mixed? a) yes  b) no

Solved • Jun 30, 2020

Molecular Equations

Q. Write a molecular equation for the precipitation reaction that occurs (if any) when the following solutions are mixed. If no reaction occurs, write...

Solved • Jun 16, 2020

Molecular Equations

Q. A student was given a solid containing a mixture of nitrate salts. The sample completely dissolved in water, and upon addition of dilute HCl, no pr...

Solved • Jun 15, 2020

Molecular Equations

Q. What precipitate forms when mixing copper(II) sulfate and sodium sulfate?A. copper(I) sulfateB. copper (III) sulfateC. no precipitate forms

Solved • Jun 15, 2020

Molecular Equations

Q. The neutralization of formic acid by NaOH produces a) sodium formaldehyde b) formate ion and hydronium ion c) sodium formate as the only product d)...

Solved • May 1, 2020

Molecular Equations

Q. NaOH(aq) + (NH4)2SO4(aq) → _________________Express your answer as a chemical equation. Enter NO REACTION if no reaction occurs. Identify all of th...

Solved • Apr 30, 2020

Molecular Equations

Q. (NH4)2SO4(aq)+CuCl2(aq) →Express your answer as a chemical equation. Enter NO REACTION if no reaction occurs. Identify all of the phases in your an...

Solved • Apr 30, 2020

Molecular Equations

Q. Write the balanced chemical equation for the neutralization reaction that occurs when an aqueous solution of hydrobromic acid (HBr) is mixed with a...

Solved • Apr 29, 2020

Molecular Equations

Q. BalancingAl2(SO4)3(aq) + AgNO3(aq) →Express your answer as a chemical equation. Enter NO REACTION if no reaction occurs. Identify all of the phases...

Solved • Apr 28, 2020

Molecular Equations

Q. Balancing(NH4)2S(aq) + BaCl2(aq) →Express your answer as a chemical equation. Enter NO REACTION if no reaction occurs. Identify all of the phases i...

Solved • Apr 28, 2020

Molecular Equations

Q. BalancingNaI(aq) + Hg2(C2H3O2)2(aq) →Express your answer as a chemical equation. Enter NO REACTION if no reaction occurs. Identify all of the phase...

Solved • Apr 28, 2020

Molecular Equations

Q. Predict the products for the following precipitation reaction: NiCl2 (aq)+ (NH4)2S(aq) →a) NiS(s) + NH4Cl(aq)b) NiS(aq) + 2NH4Cl(aq)c) NiS(s) + 2NH...

Solved • Apr 27, 2020

Molecular Equations

Q. Write the balanced chemical equation for each of these reactions. Include phases.1. When aqueous sodium hydroxide is added to a solution containing...

Solved • Apr 23, 2020

Molecular Equations

Q. Write a neutralization reaction for each acid and base pair. HI(aq) and NaOH(aq), HBr(aq) and KOH(aq), HNO3(aq) and Ba(OH)2(aq), HClO4(aq) and Sr(O...

Solved • Apr 21, 2020

Molecular Equations

Q. Write and balance equations for the following acid-base neutralization reactions CsOH(aq) + H2SO4(aq) →Express your answer as a chemical equation. ...

Solved • Apr 21, 2020

Molecular Equations

Q. Balanced equation for KHP and NaOH?

Solved • Apr 21, 2020

Molecular Equations

Q. For each reaction, identify the precipitate or lack thereof. CaCl2(aq) + K2CO3(aq) → CaCO3 + 2KCl a) CaCO3 b) KCI c) no precipitate FeCl2(aq) + (NH...

Solved • Mar 20, 2020

Molecular Equations

Q. Consider this aqueous reaction.HNO3(aq)+Ba(OH)2(aq) →What is the formula for the salt that forms?

Solved • Mar 20, 2020

Molecular Equations

Q. A) NaCl(aq)+Hg2(C2H3O2)2(aq)→Express your answer as a chemical equation. Enter NO REACTION if no reaction occurs. Identify all of the phases in you...

Solved • Mar 17, 2020

Molecular Equations

Q. Ammonia, NH3, is a weak electrolyte. It forms ions in solution by reacting with water molecules to form the ammonium ion and hydroxide ion. Write t...

Solved • Mar 17, 2020

Molecular Equations

Q. A student was given a solid containing a mixture of nitrate salts. The sample completely dissolved in water, and upon addition of dilute HCl, no pr...

Solved • Mar 13, 2020

Molecular Equations

Q. Which of these processes will occur if solutions of Li2CO3(aq) and CdCl2(aq) are mixed?A. LiCl will precipitate; Cd2+ and CO32- are spectator ions....

Solved • Oct 3, 2019

Molecular Equations

Q. For the following reactants, what are the products of the double displacement reaction?FeCl3(aq) + Ba(OH)2(aq) →Choose 1 answer:a. no reactionb. Fe...

Solved • Aug 25, 2019

Molecular Equations

Q. Sodium Bicarbonate reacts with Acetic Acid and causes a chemical reaction. The end products of this reaction are water and what compound?

Solved • Aug 7, 2019

Molecular Equations

Q. How to complete this reaction? HNO3 + H2O ?

Solved • Aug 7, 2019

Molecular Equations

Q. What is the balanced equation for the reaction between acetic acid and NaOH?

Solved • Aug 7, 2019

Molecular Equations

Q. Ammonia, NH3, is a weak electrolyte. It forms ions in solution by reacting with water molecules to form the ammonium ion and hydroxide ion. Write t...

Solved • Aug 5, 2019

Molecular Equations

Q. Enter the equation for the decomposition of water into its elements. Phase symbols are not graded.

Solved • Aug 2, 2019

Molecular Equations

Q. What is the formula for the salt that forms from HNO 3 + Ba(OH)2? 

Solved • Aug 2, 2019

Molecular Equations

Q. Write the balanced equation for the ionization of the weak base pyridine, C 5H5N, in water, H2O. Phases, such as (aq) or (l), are optional.

Solved • Jul 10, 2019

Molecular Equations

Q. Qualitative analysis. A flowchart showing a common scheme for identifying cations.If a solution contained a mixture of Ag+ and Al3+ ions, would thi...

Solved • Jan 3, 2019

Molecular Equations

Q. A solution containing several metal ions is treated with dilute HCl; no precipitate forms. The pH is adjusted to about 1, and H2S is bubbled throug...

Solved • Jan 3, 2019

Molecular Equations

Q. Baking soda (sodium bicarbonate, NaHCO3) reacts with acids in foods to form carbonic acid (H2CO3), which in turn decomposes to water and carbon dio...

Solved • Jan 3, 2019

Molecular Equations

Q. Three cations, Ni2+, Cu2+, and Ag+, are separated using two different precipitating agentsBased on Figure 17.22 in the textbook, what two precipita...

Solved • Jan 3, 2019

Molecular Equations

Q. Three cations, Ni2+, Cu2+, and Ag+, are separated using two different precipitating agents.Using these agents, indicate which of the cations is A, ...

Solved • Jan 3, 2019

Molecular Equations

Q. In the course of various qualitative analysis procedures, the following mixtures are encountered. Suggest how each mixture might be separated.Zn2+ ...

Solved • Jan 3, 2019

Molecular Equations

Q. Formic acid has the chemical formula HCOOH. It is a colorless liquid that has a density of 1.220 g/mL.Formic acid can react with NaOH in aqueous so...

Solved • Nov 12, 2018

Molecular Equations

Q. A major challenge in implementing the “hydrogen economy” is finding a safe, lightweight, and compact way of storing hydrogen for use as a fuel. The...

Solved • Nov 12, 2018

Molecular Equations

Q. Write a balanced equation for the reaction of chlorine gas with bromine gas.

Solved • Nov 12, 2018

Molecular Equations

Q. Write a balanced equation for the reaction of hydrogen gas with bromine gas.

Solved • Nov 12, 2018

Molecular Equations

Q. Write a balanced chemical equation for the reaction of solid strontium with iodine gas.

Solved • Nov 12, 2018

Molecular Equations

Q. A 6.54 g sample of a mixture of magnesium carbonate and calcium carbonate is treated with excess hydrochloric acid. The resulting reaction produces...

Solved • Oct 31, 2018

Molecular Equations

Q. A 6.54 g sample of a mixture of magnesium carbonate and calcium carbonate is treated with excess hydrochloric acid. The resulting reaction produces...

Solved • Oct 31, 2018

Molecular Equations

Q. A gas-phase reaction was run in an apparatus designed to maintain a constant pressure.Write a balanced chemical equation for the reaction depicted.

Solved • Oct 31, 2018

Molecular Equations

Q. Neutralization reaction between Mg(OH)2(s) and hydrochloric acid. Milk of magnesia is a suspension of water-insoluble magnesium hydroxide, Mg(OH)2(...

Solved • Oct 31, 2018

Molecular Equations

Q. A precipitation reaction.Which ions remain in solution after PbI2 precipitation is complete?

Solved • Oct 31, 2018

Molecular Equations

Q. (a) When the metallic element sodium combines with the nonmetallic element bromine, Br2(l), what is the chemical formula of the product?In the bala...

Solved • Oct 31, 2018

Molecular Equations

Q. Write a balanced chemical equation for the reaction that occurs when titanium metal reacts with O2(g).

Solved • Oct 31, 2018

Molecular Equations

Q. You may want to reference (Pages 91 - 92) Section 3.3 while completing this problem.When the metallic element sodium combines with the nonmetallic ...

Solved • Oct 31, 2018

Molecular Equations

Q. As K2O dissolves in water, the oxide ion reacts with water molecules to form hydroxide ions.Enter the molecular equation for this reaction.

Solved • Oct 31, 2018

Molecular Equations

Q. The accompanying photo shows the reaction between a solution of Cd(NO3)2 and one of Na2S. What is the identity of the precipitate?

Solved • Oct 31, 2018

Molecular Equations

Q. Three solutions are mixed together to form a single solution; in the final solution, there are 0.2 mol Pb(CH3COO)2, 0.1 mol Na2S, and 0.1 mol CaCl2...

Solved • Oct 31, 2018

Molecular Equations

Q. Separate samples of a solution of an unknown salt are treated with dilute solutions of HBr, H2SO4, and NaOH. A precipitate forms in all three cases...

Solved • Oct 31, 2018

Molecular Equations

Q. You know that an unlabeled bottle contains an aqueous solution of one of the following: AgNO3, CaCl2, or Al2(SO4)3. A friend suggests that you test...

Solved • Oct 31, 2018

Molecular Equations

Q. You are presented with a white solid and told that due to careless labeling it is not clear if the substance is barium chloride, lead chloride, or ...

Solved • Oct 31, 2018

Molecular Equations

Q. Consider two solutions, the first being 50.0 mL of 1.00 M CuSO4 and the second 50.0 mL of 2.00 M KOH. When the two solutions are mixed in a constan...

Solved • Oct 31, 2018

Molecular Equations

Q. (a) A strontium hydroxide solution is prepared by dissolving 12.50 g of Sr(OH)2 in water to make 50.00 mL of solution. What is the molarity of this...

Solved • Oct 31, 2018

Molecular Equations

Q. A sample of 5.55 g of Mg(OH)2 is added to 25.2 mL of 0.180 M HNO3.Write the chemical equation for the reaction that occurs.

Solved • Oct 31, 2018

Molecular Equations

Q. Suppose you have a solution that might contain any or all of the following cations: Ni2+, Ag+, Sr2+, and Mn2+. Addition of HCl solution causes a pr...

Solved • Oct 31, 2018

Molecular Equations

Q. Suppose you have a solution that might contain any or all of the following cations: Ni2+, Ag+, Sr2+, and Mn2+. Addition of HCl solution causes a pr...

Solved • Oct 31, 2018

Molecular Equations

Q. Write the balanced chemical equations for the combination reaction between nickel metal and chlorine gas.

Solved • Oct 31, 2018

Molecular Equations

Q. A solution is made by mixing 15.0 g of Sr(OH)2 and 60.0 mL of 0.210 M HNO3.You may want to reference (Pages 149 - 153) Section 4.6 while completing...

Solved • Oct 31, 2018

Molecular Equations

Q. A solution of 116 mL of 0.180 M KOH is mixed with a solution of 260 mL of 0.210 M NiSO4.Write the balanced chemical equation for the reaction that ...

Solved • Oct 31, 2018

Molecular Equations

Q. A solution of 116 mL of 0.180 M KOH is mixed with a solution of 260 mL of 0.210 M NiSO4.What precipitate forms?

Solved • Oct 31, 2018

Molecular Equations

Q. Does a reaction occur when NiCl2(aq) is added to a test tube containing Zn(NO3)2(aq)?

Solved • Oct 31, 2018

Molecular Equations

Q. Identify the precipitate (if any) that forms when NaCH3COO (also written as NaC2H3O2) and HCl are mixed.        

Solved • Oct 31, 2018

Molecular Equations

Q. Identify the precipitate (if any) that forms when KOH and Cu(NO3)2 are mixed.        

Solved • Oct 31, 2018

Molecular Equations

Q. Identify the precipitate (if any) that forms when Na2S and CdSO4 are mixed.    

Solved • Oct 31, 2018

Molecular Equations

Q. Enter a balanced equation for the reaction of NaCH3COO (also written as NaC2H3O2) and HCl.

Solved • Oct 31, 2018

Molecular Equations

Q. Enter a balanced equation for the reaction of KOH and Cu(NO3)2.

Solved • Oct 31, 2018

Molecular Equations

Q. Enter a balanced equation for the reaction of Na2S and CdSO4.

Solved • Oct 31, 2018

Molecular Equations

Q. Complete and balance the following molecular equation.HBr(aq) + Ca(OH)2(aq)  → 

Solved • Oct 31, 2018

Molecular Equations

Q. Complete and balance the following molecular equation.Cu(OH)2(s) + HClO4(aq)  → 

Solved • Oct 31, 2018

Molecular Equations

Q. Complete and balance the following molecular equation.Al(OH)3(s) + HNO3(aq)  → 

Solved • Oct 31, 2018

Molecular Equations

Q. Will precipitation occur when the following solutions are mixed?Na2CO3 and AgNO3

Solved • Oct 31, 2018

Molecular Equations

Q. Will precipitation occur when the following solutions are mixed?NaNO3 and NiSO4

Solved • Oct 31, 2018

Molecular Equations

Q. Will precipitation occur when the following solutions are mixed?FeSO4 and Pb(NO3)2

Solved • Oct 31, 2018

Molecular Equations

Q. Will precipitation occur when the following solutions are mixed?Write a balanced chemical equation for the reaction.Na2CO3 and AgNO3

Solved • Oct 31, 2018

Molecular Equations

Q. Will precipitation occur when the following solutions are mixed?Write a balanced chemical equation for the reaction.FeSO4 and Pb(NO3)2

Solved • Oct 31, 2018

Molecular Equations

Q. You may want to reference (Pages 126 - 130) Section 4.2 while completing this problem.Separate samples of a solution of an unknown ionic compound a...

Solved • Oct 31, 2018

Molecular Equations

Q. Write a balanced chemical equation for the reaction that occurs when Mg(s) reacts with Cl2(g).

Solved • Oct 31, 2018

Molecular Equations

Q. Give the best definition of a precipitation reaction.

Solved • Oct 31, 2018