Complete the following neutralization reaction. Only include coefficients greater than 1. Provide your answer below: KOH + → KNO3 +
Complete the acid-base reaction between butyric acid HC4H7O2 and potassium hydroxide KOH. Do not include spectator ions. Do not include phase designations for any of the reactants or products. Be sure to include the charge for any charged species. Provide your answer below:
Which of the following compounds is water soluble? Select the correct answer below: FeCO3 ZnS CrPO4 Na2CO3
Which of the following hydroxide compounds are insoluble? Select all that apply: Al(OH)3 Ba(OH)2 KOH Mg(OH)2 NaOH
Identify which of the following is soluble in water. Select the correct answer below: CsF BaSO4 Mg(OH)2 MnS
Identify which of the following is soluble Select the correct answer below: ammonium hydroxide rubidium hydroxide potassium sulfate all of the above
Which type of anion will typically result in an insoluble compound? Select the correct answer below: chromate bicarbonate chlorate acetate
Which of the following compounds is NOT water soluble? Select the correct answer below: NaOH Fe(OH)3 Ba(OH)2 KOH
An aqueous solution contains the following ions: Cl−, F−, HCO3−, Mg2+, and NH4+. Is a precipitate likely to form? If so, give the formula of the precipitate. Select the correct answer below: Mg(HCO3)2 MgF2 NH4F No precipitate will form.
Which of the following ions will form a precipitate with the lead (II) cation in solution? Select all that apply: Ag+ Cl− F− NO3− SO42−
Write and balance the half-reaction for the oxidation of white phosphorous P4 to the phosphate ion PO43− in a basic solution. Use e− to represent the formula of an electron. Do NOT include the state (phase) information. Do NOT write out coefficients that are equal to 1 . Be sure to denote any charges as needed. Provide your answer below:
Write the balanced equation for the following reaction in acidic solution: Cr2O72− + C2H6O → Cr3+ + C2H4O Provide your answer below: H+ + Cr2O72− + C2H6O → Cr3+ + H2O + C2H4O
Given C + 2H2SO4 → CO2 + 2SO2 + 2H2O, identify which element is reduced. Select the correct answer below: O C S H
2Cs + Br2 → 2CsBr is a redox reaction. Which of the following is the reducing agent and what is its change in oxidation number? Select the correct answer below: Cs is the reducing agent, oxidation change from 0 to 1− Br is the reducing agent, oxidation change from 0 to 1− Cs is the reducing agent, oxidation change from 0 to 1+ Br is the reducing agent, oxidation change from 0 to 1+
What is true about the following reaction? A + B → AB Select the correct answer below: one molecule of A and one molecule of B will yield one molecule of AB one dozen molecules of A and one dozen molecules of B will yield one dozen molecules of AB one mole of A and one mole of B will yield one mole of AB all of the above
The substances on the right side of a chemical equation are called: Select the correct answer below: reactants products coefficients subscripts
In redox reactions, the species that is reduced is also the . (Select all that apply) Select all that apply: oxidizing agent reducing agent reductant oxidant
Which of the following acts as a reductant in the following reaction? H2(g) + Cl2(g) ⟶ 2HCl(g) Select the correct answer below: H2(g) Cl2(g) HCl(g) None of the above
Identify the oxidizing agent in the following reaction: Cr+ + Sn4+ → Cr3+ + Sn2+ Select the correct answer below: Cr+ Sn4+ Cr3+ Sn2+
What is occurring in the following unbalanced reaction: ClO3− → ClO2 Select the correct answer below: Chlorine is oxidized. Chlorine is reduced. Oxygen is oxidized. Oxygen is reduced.
Coefficients in a chemical formula provide: Select the correct answer below: the relative numbers of products and reactants the absolute number of products and reactants the number of reactants only the number of products only
According to general stoichiometric calculations, which of the following depicts the step relating number of particles of a substance with the moles of that substance? Select the correct answer below: molarity density avogadro's number molar mass
According to general stoichiometric calculations, which of the following depicts the step relating volume of a substance with the mass of that substance? Select the correct answer below: molarity density avogadro's number molar mass
What is the stoichiometric ratio of the following: 4FeS + 7O2 → 2Fe2O3 + 4SO2 Select the correct answer below: 4 moles + 2 moles → 2 moles +2 moles 4 moles + 7 moles → 2 moles + 4 moles 4 moles + 7 moles → 1 mole + 4 moles 4 moles + 7 moles → 3 moles + 4 moles
Given a certain number of moles of hydrogen, what must that number be multiplied by to give the number of moles of ammonia produced, according to the following reaction? N2 + 3H2 → 2NH3 Select the correct answer below: 1/2 2 2/3 3/2
According to general stoichiometric calculations, which of the following depicts the step relating moles of a substance with the mass of that substance? Select the correct answer below: molarity density avogadro's number molar mass
Which of the following is NOT a step in balancing redox reactions in acidic media? Select the correct answer below: Add the balanced half-reactions together and simplify by removing species that appear on both sides of the equation. Multiply each half-reaction's coefficients by the largest possible integers to yield equal numbers of electrons in each. Balance oxygen atoms by adding H2O molecules. Balance charge by adding electrons.
How many electrons must be added to balance the following half reaction, and to which side: 2OH− + Fe → Fe(OH)2 Select the correct answer below: 2 electrons on the right 2 electrons on the left 1 electron on the right 1 electron on the left
In redox reactions, the reactant that is oxidized is also called the (Select ALL that apply) Select all that apply: oxidizing agent reducing agent reductant oxidant
The of an atom or molecule when it undergoes reduction. Select the correct answer below: oxidation number, increases oxidation number, decreases charge, increases charge, decreases
Which is a soluble compound? Select the correct answer below: (NH4)2SO4 BaSO4 CaSO4 Ag2SO4
An aqueous solution contains the following ions: Cl−, Ag+, Pb2+, NO3−, and SO42− . More than one precipitate will form. Identify the precipitates. Select all that apply: AgCl Ag2SO4 PbCl2 Pb(NO3)2 PbSO4
Complete the neutralization reaction: Provide your answer below: HCl(aq) + NaOH(aq) → (aq)+ (1)
Identify the oxidizing agent in the following redox reaction CH4 + 2O2 ⟶ CO2 + 2H2O Select the correct answer below: CH4 O2 CO2 H2O
Which of the following species is reduced during the following reaction? CH4(g) + O2(g) ⟶ CO2(g) + H2O(g) Select the correct answer below: CH4 O2 CO2 H2O
What is the stoichiometric factor between H2 and H2O in the following balanced chemical equation? 2H2 + O2 ⟶ 2H2O Report your answers as whole numbers without any decimal places. Provide your answer below:
In the redox reaction Cr2O72−(aq) + I−(aq) ⟶ Cr3+(aq) + I2(s), what is the balanced oxidation reaction (before the half reactions are added together)? Select the correct answer below: 6e− + 14H+ + Cr2O72−(aq) ⟶ 2Cr3+(aq) + 7H2O 2I−(aq) ⟶ I2(s) + 2e− 2I−(aq) + 2e− ⟶ I2(s) Cr2O72−(q) ⟶ 2Cr3+(aq)
Complete and balance the reaction of aluminum dissolving in sulfuric acid to produce sulfur dioxide. Assign values to the coefficients represented by a through f below. aAl(s) + bSO42−(aq) +cH+(aq) ⟶ dAl3+(aq) + eSO2(g) + fH2O(l)Write the values of all of the coefficients, even those equal to 1. Provide your answer below: a = , b = , c = , d = , e = , f =