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    Work Sheet For G10

    Uploaded by

    Firaol Geremu
    This document contains a chemistry worksheet for 10th grade students with questions about electrolytic cells and electrochemistry. The worksheet has two parts - multiple choice questions about topics like oxidation, reduction, anodes, cathodes and voltaic cells, and short answer questions about Daniell cells, the differences between galvanic and electrolytic cells, salt bridges, and electrolysis processes like electrorefining and electroplating. It provides practice for students on important concepts in electrochemistry.

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    Work Sheet For G10

    Uploaded by

    Firaol Geremu
    35 views2 pages
    This document contains a chemistry worksheet for 10th grade students with questions about electrolytic cells and electrochemistry. The worksheet has two parts - multiple choice questions about topics like oxidation, reduction, anodes, cathodes and voltaic cells, and short answer questions about Daniell cells, the differences between galvanic and electrolytic cells, salt bridges, and electrolysis processes like electrorefining and electroplating. It provides practice for students on important concepts in electrochemistry.

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    This document contains a chemistry worksheet for 10th grade students with questions about electrolytic cells and electrochemistry. The worksheet has two parts - multiple choice questions about topics like oxidation, reduction, anodes, cathodes and voltaic cells, and short answer questions about Daniell cells, the differences between galvanic and electrolytic cells, salt bridges, and electrolysis processes like electrorefining and electroplating. It provides practice for students on important concepts in electrochemistry.

    Copyright:

    © All Rights Reserved
    Download as DOCX, PDF, TXT or read online from Scribd
    Download as docx, pdf, or txt
    35 views2 pages

    Work Sheet For G10

    Uploaded by

    Firaol Geremu
    This document contains a chemistry worksheet for 10th grade students with questions about electrolytic cells and electrochemistry. The worksheet has two parts - multiple choice questions about topics like oxidation, reduction, anodes, cathodes and voltaic cells, and short answer questions about Daniell cells, the differences between galvanic and electrolytic cells, salt bridges, and electrolysis processes like electrorefining and electroplating. It provides practice for students on important concepts in electrochemistry.

    Copyright:

    © All Rights Reserved
    Download as DOCX, PDF, TXT or read online from Scribd
    Download as docx, pdf, or txt
    of 2

    Shebu Ejersa Dr.

    Bekele Hey Memorial School


    2015E.c 2nd semester Chemistry WorkSheet For Grade 10th Student
    011-8-631764 170175

    Part I. Choose the Best Answer From the given Alternative


    1. In an electrolytic cell the electrode at which the electrons enter the solution is called the ____ the
    chemical change that occurs at this electrode is called ____
    (a) anode, oxidation (b) anode, reduction
    (c) cathode, oxidation (d) cathode, reduction
    (e) cannot tell unless we know the species being oxidized and reduced.
    2. Which of the following statements is FALSE?
    (a) Oxidation and reduction half-reactions occur at electrodes in electrochemical cells.
    (b) All electrochemical reactions involve the transfer of electrons.
    (c) Reduction occurs at the cathode.
    (d) Oxidation occurs at the anode.
    (e) All voltaic (galvanic) cells involve the use of electricity to initiate nonspontaneous chemical
    reactions.
    3. The half-reaction that occurs at the anode during the electrolysis of molten sodium bromide is:
    (a) 2 Br- Br2 + 2 e- (b) Br2 + 2 e- 2 Br-
    (c) Na+ + e- Na (d) Na Na+ + e- (e) 2 H2O + 2 e- 2 OH- + H2
    4. In voltaic cells, such as those diagrammed in your text, the salt bridge _______ .
    (a) is not necessary in order for the cell to work
    (b) acts as a mechanism to allow mechanical mixing of the solutions
    (c) allows charge balance to be maintained in the cell
    (d) is tightly plugged with firm agar gel through which ions cannot pass
    (e) drives free electrons from one half-cell to the other
    5. Which of the following statements is(are) true for all voltaic (or galvanic) cells?
    (I) Reduction occurs at the cathode.
    (II) The anode gains mass during discharge (note: this means operation of the cell.)
    (III) The voltage is less than or equal to zero.
    (a) only III (b) only II (c) only I (d) II and III (e) I, II, and III
    6. Which one of the following is a weak acid?
    (a) HNO3 (b) HI (c) HBr (d) HF (e) HClO3
    7. Which salt is not derived from a strong acid and a strong soluble base?
    (a) MgCl2 (b) Ba(NO3)2 (c) LiClO4 (d) CsBr (e) NaI
    8. Which one of the following is a strong electrolyte?
    (a) H2O (b) KF (c) HF (d) HNO2 (e) (CH3)3N
    9. The pOH of a solution of NaOH is 11.30. What is the [H+] for this solution?
    (a) 2.0 x 10-3 (b) 2.5 x 10-3 (c) 5.0 x 10-12 (d) 4.0 x 10-12 (e) 6.2 x 10-8
    1|Page
    10. The [H3O+] in a 0.050 M solution of Ba(OH)2 is:
    (a) 1.0 x 10-5 M (b) 5.0 x 10-2 M (c) 1.0 x 10-13 M (d) 5.0 x 10-10 M (e) 2.0 x 10-5 M
    11. The gain of electrons by an element is called __________.
    A) oxidation B) sublimation C) reduction D) disproportionation
    12. In a voltaic cell, electrons flow from the __________ to the __________.
    A) salt bride, anode B) anode, cathode C) anode, salt bridge D) cathode, anode
    13. In Cu – Zn cell
    (a) Reduction occurs at the copper cathode (b) Oxidation occurs at the copper cathode
    (c) Reduction occurs at the anode (d) Chemical energy is converted to light energy
    14. The conductivity of strong electrolyte is
    (a) Increase on dilution slightly (b) Decrease on dilution
    (c) Does not change with dilution (d) Depend upon density of electrolytes itself
    15. When the sample of copper with zinc impurity is to be purified by electrolysis, the appropriate
    electrodes are Cathode – Anode
    (a) Pure zinc – Pure copper (b) Impure sample – Pure copper
    (c) Impure zinc – Impure sample (d) Pure copper – Impure sample

    Part II. Short Answer


    16. What is Daniell cell?

    17. What is/are difference between galvanic and electrolytic cell?

    18. Define anode and cathode

    19. Describe the electrolysis of molten NaCl using inert electrodes

    20. What is a salt bridge? List its Function.

    21. List and discuss type of salt.

    22. Explain the difference between micro and macro nutrient.

    23. Explain the difference between electro refining and electroplating.

    24. What type of salt (acidic, basic or normal) will be formed if one mole of H3 PO4 is allowed to react
    with
    a) 1 mole of NaOH? b) 2 moles of NaOH? c) 3 moles of NaOH?

    April 19 2023 G.c


    Prepared By: Firaol G.
    Submitted on April 21, 2023

    2|Page

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