第八章单元测试
- What should do if some yellow FeC2O4 solid left? （ ）
- Which step is most important？ （ ）
- After irradiation(光照), what should be used to wash the cyanotype photo?（ ）
- Which of the following statements related to the preparation of standard AgNO3 solution are correct? （ ）
- When adjusting the acidity of solution, add some K2C2O4 solution if the pH is low. （ ）
A:add more H2O B:add more H2O2 C:add more H2SO4 D:<span style="color:inherit; font-family: "PingFang SC"; font-size: 16px; caret-color:inherit;">No options available</span>
答案:add more H2O2
A:<span style="color:inherit; font-family: "PingFang SC"; font-size: 16px; caret-color:inherit;">No options available</span> B:oxidation of Fe2(C2O4)3 C:formation of FeC2O4 D:oxidation of FeC2O4
A:tap water(自来水) B:H2O2 C:K3[Fe(CN)6] D:K2[Fe(CN)6]
A:All the glassware should be clean and free of Cl B:AgNO3 should be weighed out by an analytical balance C:The volumetric flask(容量瓶) is brown D:The volumetric flask is colorless
A:错 B:对
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