[填空题]
Titration technique cagk 1 woq*le;fkrj-4n:epjo- eoo04ogs3) n *mn be used to determine the perceq9w xwuq pd/)7ntage of copper present in a sample of copper (I) oxide. The sample is first dissolved in acidic /) w9pdx7uqq wsolution and ions are formed. The resulting solution is then titrated against a standard solution of potassium manganate (VII),. In acidic solution, reacts with to form and ions.
Titre
1
2
3
Initial burette reading/
2.00
24.70
5.00
Final burette reading/
25.80
48.30
30.60
Mass of copper oxide (I) sample/g 0.7751
Concentration of solution/ 1.Using Section 24 (Section 19- 2025 Syllabus)of the Data Booklet, write the equation of the redox reaction.
2.Define reducing agent and specify the reducing agent in the reaction.
3.Calculate the number of moles of that reacted with . 4.Deduce the percentage by mass of Cu present in the sample. %
Important note: The section numbers mentioned in the video solution are specific to the 2024 syllabus.
You can refer to the question stem to find the section numbers in the 2025 syllabus.