Course Syllabus for English-Taught Majors

Inorganic Chemistry Experiment-2Course Syllabus

Course Code09041004

Course CategoryMajor Core

MajorsIntensive training class

SemesterSpring

Total Hours72 Hours         Credit2

Lecture Hours0 Hours          Lab Hours72 Hours        

InstructorsYahong Li  

TextbooksInorganic Chemistry Experiment

References

1.Inorganic chemistry experiment (1st Edition), Eds: Lang Jianping, Bian Guoqing, Nanjing University press, 2009.

2.Inorganic chemistry experiment (4th Edition), Eds: Beijing Normal University, etc., Higher education press.

3.Inorganic chemistry (4th Edition), Eds: Beijing Normal University, etc., Higher education press.

4.Inorganic chemistry (3rd Edition), Eds: Wuhan University, etc., Higher education press.

 

 

Teaching Aim

  

This course is designed to familiarize the student with the basic knowledge of the safety and rules of the chemical laboratory, and operations of the glassware and measuring apparatus. Students will master the basic operations of heating, dissolving, stirring, generation and collection of the gas, evaporation and condensation, and know how to record the data. From this course, students will also learn the chemical properties and reactions of the main elements and their compounds, know how to prepare the inorganic and coordination compounds and understand how to determine the chemical constants and its related chemical principles.

 

Experiment One: Preparation of Ammonium Chloride 

 

Total Hours4 hours.

 

Contents of the experiment Preparation of ammonium chloride and determine the purity of the product.

The purposes of the experiment  Study and master the principle and the method for preparing ammonium chloride by conversion method and practice the basic operations of dissolve, evaporation, crystallization and filtration.

 

Experiment Two: Synthesis of CaO2

 

Total Hours4 hours.

Contents of the experimentSynthesis of CaO2 and determine O22-.

The purposes of the experimentUnderstand the principle of synthesis CaO2 and know the method of synthesis CaO2.

 

Problems:

How to analysis and determine the O22- ion.

Experiment Three: Redox Reactions and Redox Equilibrium

 

Total Hours4 hours.

Contents of the experimentTest Redox reactions and electrode potential, the effect of concentration on the electrode potential and the effects of acidity and concentration on the redox reaction.

The purposes of the experimentLearn to assemble the battery. Know the nature of the electrode. Know the effects of the concentration of electric pair and the acidity of the medium on the electrode potential, the direction of the redox reaction, the product and the rate of the reaction. Understand the chemical battery and electrode potential.

 

Problems:

1) Which kind of factors will affect the results of redox reactions?

2) Why we can’t get sodium metal when Na2SO4 solution is electrolyzed?

3) What is the effect of the medium on the oxidbillity of KMnO4?

Explain it from the experimental results and the electrode potential.

 

Experiment Four: Non-metallic Elements (Halogen, Oxygen, Sulfur)

 

Total Hours4 hours.

 

Contents of the experiment Preparation and the collection of gases. Test the difference of oxidbillity between hypochlorite and chlorate and the properties of H2O2 and the main properties of sulfuric compounds of different oxidation states.

The purposes of the experimentLearn the methods of preparing chlorine, hypochlorite and chlorate. Know the difference of oxidbillity between hypochlorite and chlorate, the properties of H2O2 and the main properties of sulfuric compounds of different oxidation states. Know the method of preparation of gas and assembly of the glassware. Learn how to operate the reactions of chlorine, bromine and potassium chlorate safely.

Problems:

1) Chlorine can substitute iodine from the solution of I-. Iodine can substitute chlorine from potassium chlorate solution? Are these two reactions contradictive?

2) According to the experimental results to finish followed questions.

  (1) Compare oxidation property of S2O82-and MnO4-;

  (2) Compare reductive property of S2O32-and I-.

3) When Na2S2O3 reacts with silver nitrate solution, sometimes precipitation of silver sulfide is obtained, and sometimes [Ag(S2O3)2]3– is obtained ,Why ?

4) How to identify:

 (1) Sodium hypochlorite and sodium chlorate;

 (2) Three kinds of acidic gases: H2S, SO2 and HCl.

  (3) Na2SO4, Na2SO3, Na2S2O3, Na2S.

5) Design a diagram to describe how to convert one sulfur compound to another one with different oxidation state.

 

Experiment Five: Isolation and Identification of Common Non-Metallic Anions

Total Hours4 hours.

Contents of the experimentThe identification of the common anions and the separation of ions in a mixture.

The purposes of the experimentStudy and master the methods of isolation and identification of common non-metallic anions, and the basic operations of identification of anions.

Problems:

1) Mix two of the following four unknown salts, add water to dissolve the mixture, and precipitates are formed. Divide the precipitates into two portions. One portion could be dissolved by HCl solution, another one could be dissolved by HNO3 solution. What are these two salts?

   BaCl2, AgNO3, Na2SO4, (NH4)2CO3, KCl

2) There is a water-soluble mixture containing Ag+ and Ba2+. Which kinds of anions listed below are not contained in the mixture?

SO32-,  Cl-,  NO3-,  SO42-,  CO32-I-

3) Preliminary test results of an unknown liquid anion are as follows:

  (1) No gas is released after being acidified;

 (2) No precipitates are generated when BaCl2 solution is added in acidified solution;

  (3)Yellow precipitates are formed when diluted nitric acid and AgNO3 solution are added;

 (4) Add KMnO4 to acidified solution, the purple color fades. If I2-starch solution is added, the blue color does not fade.

 (5) Did not react with KI.

    According to the preliminary results, what anions are there in the mixture? Give your reasons and list a scheme for identifying the results.

4) Dilute H2SO4 or dilute HCl solution is added to a solid sample, and bubbles are released. What anions are there in the solid?

5) There is an unknown liquid anion solution. After the solution is acidified by dilute HNO3, AgNO3 is added. There are no precipitates in the solution. Which anions are not in the solution?

6) Which anion could let the blue color of I2-starch solution to be faded in acidic solution?

 

 

Experiment Six: Main Group Metals (Alkali Metals, Alkaline Earth Metals Al, Sn, Pb, Sb and Bi)

 

Total Hours4 hours.

Contents of the experimentTest the properties of Na, K, Mg, Al, the solubilities of the hydroxides of magnesium, calcium, barium and aluminum and the flame reactions of IA and IIA elements.

The purposes of the experimentCompare the reaction activities between alkali metal and alkaline earth metal.  Test and compare the solubilities of hydroxides and salts of alkaline-earth metal, aluminum, tin, lead, antimony and bismuth. Practice the flame reactions and know how to handle metallic sodium and potassium.

Problems:

 

1) How to prepare tin(II) chloride solution in lab?

2) Predict the product of the reaction of lead (IV) dioxide and concentrated hydrochloric acid. Write the equation of the reaction.

3) How to identify colorless transparent stannous chloride and tin tetrachloride solution without labels on the bottles?

4) If the magnesium is combusted in the laboratory accidentally, can we use water or carbon dioxide to extinguish a fire, and how to extinguish the fire?

 

Experiment Seven: Preparation and Content Analysis of Calcined Soda

 

Total Hours4 hours.

Contents of the experimentPurification of crude salt, preparation of NaHCO3, preparation of Na2CO3 and determine the purity of the product.

The purposes of the experiment Consolidate the operations of analytical balance and titration.

 

Problems:

 

1) Why directly reacting NaCl with NH4HCO3 can’t obtain Na2CO3. Explain it according to the solubility of NaCl, NH4HCO3, NH4Cl, NaHCO3 and Na2CO3 in different temperature?

2) Why does the crude salt need to be refined?

3) Why the temperature should be controlled between 30 to 35 in the procedure of preparing NaHCO3?

4) Why NaHCO3 is generated instead of producing H2CO3 when the solution of Na2CO3 is titrated with hydrochloric acid?

Experiment Eight: Metals Located in ds-block (Copper, Silver, Zinc, Cadmium and Mercury)

Total Hours4 hours.

Contents of the experimentTest the preparations and properties of the hydroxides or oxides of copper, silver, zinc, cadmium and mercury, preparation and properties of the sulfides of Zinc, Cadmium and Mercury and coordination complexes of Copper, Silver, Zinc and Mercury.

The purposes of the experimentUnderstand the acid and alkali properties of the oxides and hydroxides of copper, silver, zinc, cadmium and mercury and the solubility of the sulfides. Master the properties of the compounds of Cu(I), Cu (II) and their conversion conditions.Test and learn the coordination complexes of Copper, Silver, Zinc, Cadmium and Mercury as well as the conversion between Hg22+ and Hg2+.

Problems:

1) During the preparation of cuprous chloride, can we get it by the reaction of CuCl2 and copper in the weak acid condition? Why?

2) According to the standard electrode potentials of Na, K, Ca, Mg, Al, Zn, Pb, Cu, Ag, Cd, Hg, predict their activity order.

3) Which reagent can dissolve the following solids:

Cu(OH)2, CuS , CuBr2 , AgI2.

4) There are three bottles without labels containing Hg(NO3)2, Hg2(NO3)2, Ag(NO3)2 solution respectively. Use at least two methods to identify them.

5) Try to use an experiment to prove that the brass is composed of Cu and Zn (other composition is not under consideration).

 

Experiment Nine: Synthesis of Potassium Trioxalatoferrate (III)

 

Total Hours4 hours.

Contents of the experimentSynthesis of ferric hydroxide. Synthesis of potassium Trioxalatoferrate(III) and test its properties.

The purposes of the experimentMaster the method of preparing potassium trioxalatoferrate(III). Practice and consolidate the basic operations including heating, filtration, evaporation and crystallization.

Problems:

1) Why the product Ferric Hydroxide should be washed? 
2) Using Iron sulfate, barium chloride, potassium oxalate and oxalic acid as raw materials, design the method of synthesis Potassium Trioxalatoferrate(III) and write the reaction equation of each step.

 

Experiment Ten: Separation and Identification of Cations (I)

 

Total Hours4 hours.

Contents of the experimentIdentification of alkali metals and alkaline-earth metals Identifications of the ions in the p-block and ds-block elements Separation and identification of the mixed ions.
The purposes of the experimentFurther understand the properties of some metal elements and their compounds. Learn the separation and identification methods of the mixture of common cations, as well as to consolidate the operations of identifying the ions.

Problems:

1) Choose one reagent to distinguish the four kinds of solutions below.

KCl,  Cd(NO3)2,  AgNO3,  ZnSO4

2) Choose one reagent to distinguish the four kinds of ions below.

Cu2+,   Zn2+,   Hg2+,   Cd2+

3) Choose one reagent to separate ions below.

(1) Zn2+ and Cd2+       (2) Zn2+ and Al3+  (3) Cu2+ and Hg2+      

(4) Zn2+ and Cu2+       (5) Zn2+ and Sb3+

4) How to change BaSO4 to BaCO3? Compared with the conversion from Ag2CrO4 to AgCl, which one is easier?

Experiment Eleven: Determination of the Equilibrium Constant of I3-↔I-+I2—Titration Operation

 

Total Hours4 hours.

Contents of the experimentDetermination of the equilibrium constant of I3-↔I-+I2.
The purposes of the experiment Determine the equilibrium constant of I3-↔I-+I2. Understand the chemical equilibrium and equilibrium constant. Know the principles of the equilibrium movement. Practice titration operation.
Problems:

1) How should we rinse or wash the glassware before the titration analysis? Iodine is readily evaporated, so what should be paid attention to in the process of taking the solution and titration?
2) In this experiment, should the amount of iodine be weighed accurately? Why?
3) What kinds of effects will be on the results?

a. The amount of iodine is not enough;
b. The iodine bottles are not shaken thoroughly;
c. When draw the clear liquid, a small amount of solid iodine is drew into the pipette carelessly.

Experiment Twelve: Preparation of Potassium Permanganate
Total Hours4 hours.
Contents of the experimentPreparation of K2MnO4convert K2MnO4 to KMnO4 and analysis the purity of the Product.
The purposes of the experimentPractice the principle and the operation for decomposing the ore by alkali fusion method. Master the relationship between a variety of valence states of manganese and consolidate the operation of weighing by analytical balance, titration and vacuum filtration.
Problems:
  Besides the method of dismutation reaction, are there any other methods can be used to convert K2MnO4 to KMnO4? Write the chemical reaction equations.
Experiment Thirteen: The Elements of the First Transition Metal Series (Titanium, Vanadium, Chromium and Manganese)
Total Hours4 hours.
Contents of the experimentTest the important properties of titanium, vanadium, chromium and manganese compounds.

The purposes of the experimentMaster the important properties of the compounds of titanium, vanadium, chromium and manganese at different oxidation states, and the conditions of transformation between the different kinds of oxidation states. Practice the operation of heating by sand bath.

Problems:

1) In which medium, CrO2-and CrO42- could be transformed mutually?

2) Summarize the conditions of mutual conversions between Cr2O72-and CrO42-, and the solubilities of their corresponding salts.

3) Summarize the identification of Mn2+.

Experiment Fourteen: Preparation of Aluminum Sulfate

Total Hours4 hours.

Contents of the experimentThe preparation of reactant solution, explore the reaction conditions and preparation of basic copper carbonate.

The purposes of the experimentThrough exploring the reaction condition for preparing basic copper carbonate and analyzing the color and state of the product, study the reasonable ratio of the reactants and confirm the appropriate temperature of the reaction. Cultivate the student's ability to design the experiments independently.

Problems:

1)   Will the types of reactants and the reaction time affect the experimental results, besides the appropriate ratio of the reactants and the suitable temperature?

2)  Design an experiment to determine the content of copper and carbonate of the product. Analyze the quality of basic copper carbonate you prepared from the experiment result.

 

Experiment Fifteen: Preparation of Hydrated Chromium () Acetate: Preparation of the Easily Oxidized Compound

 

Total Hours4 hours.

Contents of the experimentPreparation of hydrated chromium (II) acetate.

The purposes of the experimentStudy the principles and methods of preparing the easily oxidized and unstable compounds under the nonaerobics condition. Solidify the basic operations such as washing and filtration.

Problems:

1) Why do we use a closed device to prepare chromium(II) acetate?

2) Why do we use excessive zinc complex? Why the product should be washed by ethanol, and ethyl ether?

3) How should we preserve the compound?

Experiment Sixteen: Preparing MnCO3 from MnO2

 

Total Hours4 hours.

Contents of the experimentThe reduction of MnO2 and Preparing MnCO3 from MnO2.

The purposes of the experimentLearn the method of synthesis MnCO3 from MnO2 and practice the basic experimental skills of dissolve, evaporation, crystalline and filtration.

 

Problems:

1) What is the function of NH4HCO3, besides to introduce CO32- to the system.

2) Why NH4HCO3 must be added very slowly.

 

Experiment Seventeen: Preparation and Application of Sodium hyposulfite

Total Hours4 hours.

Contents of the experimentPreparation of sodium hyposulfate. Properties of sodium hyposulfate.

The purposes of the experiment Study the principles and methods of preparing sodium hyposulfate. Test the properties of sodium hyposulfate. Solidify the basic operations such as dissolution,washing, filtration and recrystallization. Understand the applications of sodium hyposulfate in industry

 

Problems:

1) What is the purpose of adding active carbon.

2) Why do the product could only be dried at 40-50oC. What is the phenomenon if the temperature is too high.

3) How to calculate the yield.

4) What are the differences of the results by using excessive amount or appropriate amount of sodium hyposulfate solution to react with AgNO3 solution.

 

Experiment Eighteen: Synthesis and Properties of Coordination Complexes

 

Total Hours4 hours.

Contents of the experimentExamining the difference of coordination complexes, compounds and double salts. Testing the movement of coordination equilibrium.

The purposes of the experiment To compare the difference between simple compounds and double salts. To master the relationship of coordination equilibrium, precipitation reaction, Redox reaction and the acidity and alkalinity of solution.To know the conditions of the formation of coordination complexes.To know the method for identifying ions by using the masking effect of coordination complexes.

 

Problems:

1)Summarized the observed phenomena in the experiments. Explain the factors that affect the coordination equilibria.

2)According to the experiment results, compare the coordination abilities of SCN-, F-, C2O42-, and EDTA to Fe3+ ion.

 

Assessment Methods

(a)Experimental report (70%).

(b)Test (30%)

 

Experimental report = preview report (10%) + experiment result (40%) + operation skill (40%) + experiment report (10%)

 

Total grade = Experimental report + Test

 

                              Made by Yahong Li

                               Date:  2016-11-08