- Standard curve method is used to measure F content in tea samples. The potential of the sample solution should be measured twice. （ ）
- Starch solution is used as the indicator in iodometry(碘量法)（ ）
- pH range of an indicator should fall within the titration jump. （ ）
- The full name of TISAB is total ionic strength adjustment butter.（ ）
- Chemical analysis has high accuracy, so it is suitable for trace analysis（ ）
- Instrumental analysis(仪器分析) is suitable for trace analysis.（ ）
- In back titrations, at least two chemical reactions are involved. （ ）
- Argentometry(银量法) is an important method of complexation titrations.（ ）
- Due to its low polarity(极性), K3[Fe(C2O4)3]·3H2O would crystallize more easily after adding ethanol(乙醇).（ ）
- Standard curve method and standard addition method are used to determine F in tea samples. Standard curve method has large measurement errors for complicated samples. （ ）
- Citric acid(柠檬酸) used in the measurement of F content in tea samples is to prevent the interference from Al3+ and Fe3+.（ ）
- Copper methionine(蛋氨酸铜) can be used as nutritional additives.（ ）
- Compared with standard curve method, standard addition method is suitable for unknown or complicated samples. （ ）
- Indicators for complexation titrations are also called membrane indicators. （ ）
- The more the dissociated ions, the higher the molar conductivity(摩尔电导率).（ ）
- Standard curve method and standard addition method are used to determine F in tea. Which of the following statements about standard curve method are correct?（ ）。
- Which are against the lab safety requirements? （ ）
- Which of the following statements about an amphoteric substances(两性物质) are correct?（ ）。
- Which actions are NOT true for the lab note-book? （ ）
- The reasons why using back titration to determine Al content in cement(水泥) are（ ）
- Which of the followings are the main component of suction filtration?（ ）
- Which of the following anions has no oxidizing or reducing properties? （ ）
- Molar absorptivity(摩尔吸光系数) of a substance does not change with （ ）
- The quantitative determination conditions of spectrophotometric analysis are（ ）
- Which statements about copper methionine(蛋氨酸铜) are correct？（ ）
- The main sources of determination error in iodometric method(碘量法) are（ ）
- Which of the following statements about instrumental analysis(仪器分析) are correct? （ ）
- Which of the followings cannot be used to transfer the remaining alum(明矾) crystal in the beaker to the Buchner funnel? （ ）
- Three kinds of argentometry(银量法) are… （ ）
- Ion-exchange technique and Mohr method are used to determine the charge number of K3[Fe(C2O4)3]·3H2O. Which statements are correct in this experiment? （ ）
- What method is used to determine SiO2 content in cement(水泥) experiment? （ ）
- Which of the following description about heteropolyoxo(杂多酸) is correct?（ ）。
- For the K5(杂多酸) product, which of the following is correct?（ ）。
- The indicator in Mohr method is（ ）
- Generally the crystals is formed from…….（ ）。
- The aim of performing titration for at least 3 times is to reduce…（ ）。
- Which of the following description about catalyst is correct?（ ）。
- Which statement about the conditions of Mohr method is wrong?（ ）
- Which reagents can be used to identify Fe3+?（ ）。
- How to prepare (3+50) HCl solution? （ ）
- In gravimetric analysis(重量分析), the reason why the same analytical balance is used to weigh the crucible(坩埚) is （ ）
- Which number has 4 significant figures(有效数字)?（ ）。
- Which compounds is grey-green?（ ）。
- In the process of KMnO4 standardization(标定), the valence state(价态) of Mn element is….（ ）。
- Which of the following anions can react with dilute acid to release a rotten egg-smelling gas and turn lead acetate paper(乙酸铅试纸) black? （ ）
- Which statement about this lab course is NOT correct? （ ）
- Arrhenius’law is about……（ ）。
- After adding some sulphosalicylic acid (磺基水杨酸), solution turns ….
- 25.0 mL of 0.10 mol/L Na2C2O4 solution is placed in a titration flask. 0.038 mol/L KMnO4 is run from a burette into the titration flask. To ensure that the reaction takes place at a suitable rate, Na2C2O4 solution was heated to nearly 60°c ahead. Which indicator is the most suitable for this titration?（ ）。
- Which of the following statement about activation energy(活化能) is correct?（ ）。
- Which of the followings are factors that affect the stability of heteropolyacids(杂多酸)（ ）。
- K5CoW12O40 is used as a catalyst in organic synthesis. （ ）
- K5CoW12O40 has the potential to oxidize some reductive reagents. （ ）
- What is the purpose of adding potassium persulfate(K2S2O8) to the K6 solution? （ ）
- What is the name of the structural unit of potassium cobalt heteropolytungstate(杂多酸)? （ ）
- Which method can be used to measure the degree of dissociation (解离度) of the colored complex?（ ）
- Which apparatus have been used to prepare the medicine solution?（ ）
- What kind of blank solutions can be used when reagent, analyte and chromogenic reagent(显色剂) are colorless? （ ）
- The part of a spectrophotometer that selects the wavelength of light used to irradiate the sample is called the （ ）
- The function of NH2OH·HCl is…（ ）
- How to obtain the optimal pH range? （ ）
- What will happen if MgO content in cement(水泥) is too high? （ ）
- What method is used to determine SiO2 content in this experiment? （ ）
- The quality of cement relates to the national economy and the people's livelihood. （ ）
- What are the advantages of gravimetric analysis? （ ）
- Which of following methods are used to determine CaO content? （ ）
- Co(III) is more stable in simple salts than Co(II).（ ）
- The functions of H2O2 are （ ）
- Which of the following instrument can be used to determine the crystal field splitting energy(晶体场分裂能) of the cobalt ammines? （ ）
- Which of the following statements about Swiss chemist Werner are correct? （ ）
- Which of the following statement about the principles of Co determination in products is true?（ ）
- The advantages of automatic potentiometric titrators are… （ ）
- Which one cannot be used to determine the purity of products?（ ）
- Which one should be added in batches when preparing NaH2PO4·2H2O?（ ）。
- In this experiment, some ethanol(乙醇) is added to increase the solubility of the products. （ ）
- Which of the following solutions are alkaline(碱性)?（ ）
- Preliminary tests of anions mainly include volatility test, precipitation test and redox test. （ ）
- Which silver salts are insoluble in water? （ ）
- Which of the following anion can react with dilute acid to release an odorless gas, making limewater(石灰水) cloudy? （ ）
- Tap water can be used in the separation and identification of anions. （ ）
- Which of the following anion has no oxidizing or reducing property? （ ）
- The two bases in the two acids and two bases method of analysis are（ ）。
- The two acids in the two acids and two bases method of analysis are （ ）.
- Which of the following is not an obvious phenomenon of ion identification reaction? （ ）
- During cation analysis, methods to eliminate interfering ions include （ ）.
- Which sulfates(硫酸盐) are easily soluble in water? （ ）
- Because copper methionine(蛋氨酸铜) is soluble in water, use water to transfer the product remaining in the beaker when performing suction filtration(减压过滤). （ ）
- Which of the following statements about copper methionine(蛋氨酸铜) are correct? （ ）
- Why should temperature and acidity(酸度) be controlled when preparing copper methionine(蛋氨酸铜)? （ ）
- Which method is used to determine the methionine(蛋氨酸) content in copper methionine in this experiment? （ ）
- Which method is used to determine the Cu content in copper methionine in this experiment? （ ）
- When adjusting the acidity of solution, add some K2C2O4 solution if the pH is low. （ ）
- Which step is most important？ （ ）
- What should do if some yellow FeC2O4 solid left? （ ）
- Which of the following statements related to the preparation of standard AgNO3 solution are correct? （ ）
- After irradiation(光照), what should be used to wash the cyanotype photo?（ ）
- The potential has linear relationship with the concentration of F before adding TISAB. （ ）
- Which procedures can obtain a standard curve? （ ）
- Which one is not the advantage of standard curve method? （ ）
- Which of the following statements about standard addition method are correct? （ ）
- Which of the following statement about ion-selective electrodes is NOT true? （ ）
- The Arrhenius’ equation describes the relationship between rate constant and（ ）。
- The reaction between KI and K2S2O8 is a homogeneous(均相) reaction. （ ）
- In an elemental reaction(基元反应), how many transition states will be（ ）。
- Which of the followings are factors that affect the rate of a chemical reaction（ ）。
- The catalyst in this experiment can shorten the reaction time. （ ）
- Ferrous ammonium sulfate(硫酸亚铁铵) is oxidized by KMnO4 in acidic medium. （ ）
- What is the color change at the end point of the redox titration of ferrous ammonium sulfate(硫酸亚铁铵) （ ）
- What is the purpose of adding sulfuric acid(硫酸) to the ferrous ammonium sulfate(硫酸亚铁铵) solution before titration? （ ）
- What is the color of ferrous ammonium sulfate(硫酸亚铁铵) crystals? （ ）
- What is the common name of ferrous ammonium sulfate(硫酸亚铁铵)? （ ）
- Which of the followings are types of chemical reactions involved in the synthesis of alum(明矾)（ ）。
- Alum(明矾) can be used as…（ ）。
- Which of the following is property of alum(明矾)? （ ）
- In general, the solubility of double salts is higher than that of the simple salts of its constituents? （ ）
- The reaction between Al foil and NaOH is a typical redox reaction(氧化还原反应). （ ）
- Which one is not the requirement for the reactions suitable for direct titrations? （ ）
- The indicators for acid-base titrations are organic dyes, which change color with the concentration. （ ）
- Which of the followings are needed when preparing 500 mL of 0.1 mol/L HCl solution? （ ）
- The methods to improve titrimetric analysis accuracy are… （ ）
- Which indicator is used when titrating HCl with NaOH ? （ ）
- Which balances are common used in this lab course? （ ）
- Which burette is suitable for strong oxidizing solutions(强氧化性溶液)?（ ）
- Which one is not the main component of suction filtration?（ ）
- Press the top of pipette with the thumb. （ ）
- Which operations of volumetric flask may cause the concentration different from the actual one?（ ）
- Keep backpacks and other non-essential materials away from the laboratory benches(实验台). （ ）
- Which statements about lab-notebook are correct? （ ）
- What should you bring to the laboratory each time in this class? （ ）
- Which of the following is an inexact quantity? （ ）
- Which of the following is NOT a way to express the precision of a method? （ ）
答案:错
答案:对
答案:对
答案:错
答案:错
答案:对
答案:对
答案:错
答案:错
答案:对
答案:对
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