Question

Answer all of the following questions. Each question will have two parts—writing the balanced chemical equation...

Answer all of the following questions. Each question will have two parts—writing the balanced chemical equation and
answering a question about the reaction. Coefficients in the balanced chemical equation must be in the lowest whole-
number ratio. Do not include formulas for substances that remain unchanged during the reaction. Unless otherwise
noted, assume all the reactions occur in aqueous solution. If a substance is extensively ionized and therefore present as
ions in solution, write its formula as ions

a). Excess sodium hydroxide is added to an aluminum sulfate solution. Which species behaves as a Lewis acid in the
reaction? Explain.

b). Dichlorine heptaoxide is mixed with water. What is the oxidation number of the chlorine in the product.

c). A lead(II) nitrate solution is mixed with ammonium sulfate solution. Which ions, if any, are spectator ions in this reaction?

d). Solid manganese(IV) oxide is added to concentrated hydrochloric acid. What is the oxidation number of the species being oxidized before and after the reaction takes place?

Homework Answers

Answer #1

a] Al2(SO4)3 (aq) + 6NaOH (aq) -> 3Na2SO4 (aq) + 2Al(OH)3 (s)

Net ionic equation :

2Al 3+ (aq) + 6OH- (aq) -> 2Al(OH)3 (s)

Lewis acid = Al+3

Lewis acid = A species that accepts electron pair is called Lewis Acid

b] Cl2O7 + H2O → 2HClO4

Cl oxidation number = +7

c] Molecular equation:
Pb(NO3)2 (aq) + [NH4]2SO4 (aq) -----> PbSO4 (s) + 2NH4NO3 (aq)
Total ionic:
Pb2+ (aq) + 2NO3- (aq) + 2NH4+ (aq) + SO42- (aq) -----> PbSO4 (s) + 2NH4+ (aq) + 2NO3- (aq)
Net ionic:
Pb2+ (aq) + SO4 2- (aq) -----> PbSO4 (s)

NH4+ and NO3- are spectator ions since NH4NO3 is soluble.

d] 4 HCl (aq) + MnO2(s) --> 2H2O (l) + MnCl2 (aq) + Cl2 (g)

Cl- is oxidised

OXidation number before oxidised of Cl is -1

Oxidation number after oxidised is 0

Know the answer?
Your Answer:

Post as a guest

Your Name:

What's your source?

Earn Coins

Coins can be redeemed for fabulous gifts.

Not the answer you're looking for?
Ask your own homework help question
Similar Questions
1. Writing and Balancing Equations. Write the balanced chemical reaction for each of the following. On...
1. Writing and Balancing Equations. Write the balanced chemical reaction for each of the following. On the line, identify the kind of reaction. Your choices are: Combination, Combustion, Decomposition, Neutralization, Oxidation/Reduction, Precipitation. ___________________ a) Mg(s) combines with nitrogen gas. ___________________ b) When solid potassium chlorate is heated, it decomposes to form solid potassium chloride and oxygen gas. ___________________ c) The complete combustion of acetone, C3H6O(l), a compound used as fingernail polish remover. ___________________ d) Write the balanced MOLECULAR… include the...
Using the activity series, write balanced chemical equations for the following reactions. If no reaction occurs,...
Using the activity series, write balanced chemical equations for the following reactions. If no reaction occurs, simply write no reaction . 1. Nickel metal is added to a solution of copper(II) nitrate. 2. A solution of zinc nitrate is added to a solution of magnesium sulfate. 3. Hydrochloric acid is added to gold metal. 4. Chromium metal is immersed in an aqueous solution of cobalt(II) chloride. 5. Hydrogen gas is bubbled through a solution of silver nitrate.
Q. When a pink aqueous solution of potassium permanganate, faintly acidified with dilute sulfuric acid was...
Q. When a pink aqueous solution of potassium permanganate, faintly acidified with dilute sulfuric acid was treated with 10% aq. hydrogen peroxide, the reaction took place with the evolution of gas bubbles, and the pink solution was turned colorless. Further chemical analysis revealed that the evolved gas was oxygen, and the resulting solution contains potassium sulfate and manganese (II) sulfate; water was also formed during the same reaction. Please answer the followings: 1) Write down the balanced chemical equation for...
For each, provide a.type of reaction, b. Molecular equation (balanced), c.Net ionic equation. 1. Mercury(II) oxide...
For each, provide a.type of reaction, b. Molecular equation (balanced), c.Net ionic equation. 1. Mercury(II) oxide and heat 2. Iron and oxygen (O2) 3. Water And sodium 4. potassium carbonate solution and calcium nitrate solution 5. silver nitrate solution and sodium chloride solution 6. Ammonium chloride solution and sodium sulfate solution 7. Potassium iodide solution and lead (II) nitrate solution 8. Sodium carbonate solution and hydrochloric acid 9. Potassium carbonate solution and acetic acid solution 10. Solid sodium bicarbonate and...
please answer these questions 1-Consider the following balanced equation: 2 Fe(s) + 3 Cl2(g) → 2...
please answer these questions 1-Consider the following balanced equation: 2 Fe(s) + 3 Cl2(g) → 2 FeCl3(s) How many moles of iron(III) chloride are obtained when 7.67 moles of chlorine gas react with excess solid iron? Assume the reaction is 100% efficient. 2- What mass of hydrochloric acid must have reacted with magnesium if 9.56 grams of hydrogen were produced? Include units with your answer. The UNBALANCED equation is provided: Mg(s) + HCl(aq) → H2(g) + MgCl2(aq) 3- What volume...
Below is the background info for the lab assignment. The 4 blank boxes are the questions...
Below is the background info for the lab assignment. The 4 blank boxes are the questions I would like answers too. The end point for the fine titration was 35.90 mL in the burette when the solution turned bright green again. And the coarse titration I got 35.36mL as the end point. 35.9 mL is exact in case you need that info. Thanks! Background In this lab, we will determine the amount of alcohol (ethanol), C2H5OH, in a commercial vodka...
Chemical Reactions Types and Their Equations Making Heat with Chemical Reactions Have you ever wondered how...
Chemical Reactions Types and Their Equations Making Heat with Chemical Reactions Have you ever wondered how an instant heat pack works? A disposable heat pack works by a chemical reaction that combines iron in the package with oxygen from the air when the outer packaging is removed producing iron oxide. You have probably seen the product of this reaction in what is commonly called rust. The reaction releases heat, which allows the pack to reach a sufficient temperature that is...
a)How is it possible to determine if CaCO3 is Cl- free after synthesis? b)How can the...
a)How is it possible to determine if CaCO3 is Cl- free after synthesis? b)How can the Cl- ions be remove from CaCO3 after synthesis? I should answer the questions from the following experiment but if you know the answer and you are sure, yo do not need to read experiment. Please answer correctly because i hav no chance to make wrong :(((( Physical and Chemical Properties of Pure Substances Objective The aim of today’s experiment is to learn handling chemicals...
I have provided the information for the lab below. I want to see the chemical reactions...
I have provided the information for the lab below. I want to see the chemical reactions that take place during each step of the experiment. So in the procedures when a chemical was added i would like to see what the products and byproducts that were formed. I also want to see one over all reaction for this experiment to just get an overview of what exactly is happening during the experiment. Thank you:) Part B: Synthesis of [Co(NH3)5Cl]Cl2 Objective:...
Procedure Reaction 1: Dissolving the Copper 1. Obtain a clean, dry, glass centrifuge tube. 2. Place...
Procedure Reaction 1: Dissolving the Copper 1. Obtain a clean, dry, glass centrifuge tube. 2. Place a piece of copper wire in a weighing paper, determine the mass of the wire and place it in the centrifuge tube. The copper wire should weigh less than 0.0200 grams. 3. In a fume hood, add seven drops of concentrated nitric acid to the reaction tube so that the copper metal dissolves completely. Describe your observations in the lab report. (Caution, Concentrated nitric...