a) Strip of copper metal dissolved forming blue solution.
b) Copper displaces ions of Q from solution since copper is more electropositive than Q.
c) E.m.f of cell = (0.80 - 0.34)V= 0.46V
maurice.mutuku answered the question on October 31, 2019 at 05:41
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(i) Identify the electrode which is ;
(a) The least reducing agent
(b) The strongest oxidizing agent
(ii) Calculate the e.m.f of the cell formed when the two electrodes are connected
(iii) Write a cell representative for the cell above
Date posted: October 31, 2019. Answers (1)
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(ii) What conclusion can be drawn from Step IV only? Explain
(iii) What observation would indicate the presence of a NO3- ion in step I?
(iv) Write the formula of the anion in residue V. Explain
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Date posted: October 29, 2019. Answers (1)
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Date posted: October 29, 2019. Answers (1)
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Date posted: October 29, 2019. Answers (1)
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(ii) Calculate the e.m.f of the cell made up by combining the 
electrode and 
electrode
(iii) Which of the substances listed in the above table is :-
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Date posted: October 29, 2019. Answers (1)
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(i) Calculate the quantity of electricity...(Solved)
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Date posted: October 29, 2019. Answers (1)
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Study the standard electrode potential for the half-cells given below and answer the questions that follow.(The letter do not represent the actual symbols of the elements)
i) Identify the strongest oxidizing agents. Give a reason for your answer
ii) Which two half-cells would produce the highest potential difference when combined?
iii) In the space below draw a complete electro-chemical cell of the two-half cells mentioned
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Date posted: October 29, 2019. Answers (1)
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State one physical and one chemical difference between Na2O2 and Na2O
Physical difference......
Chemical difference......
Date posted: October 29, 2019. Answers (1)
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Study the electrode potentials in the table below and answer the question that follow:
(Letters are not the actual symbols of elements)
(a) Which one is the strongest reducing agent?
(b) Write the ionic equation for the reaction that takes place when Z is dipped in a solution
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(c) Calculate the 
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Date posted: October 29, 2019. Answers (1)
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Date posted: October 29, 2019. Answers (1)
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(Zn= 65, 1 Faraday = 96500C)
Date posted: October 29, 2019. Answers (1)
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i)...(Solved)
In an electrolysis, a current of 200A was passed through molten oxide of metal Q for 58 minutes and 64.8g of the metal deposited. Determine;
i) Charge on metal Q
ii) The volume of oxygen gas produced at standard temperature and pressure
Q = 27 IF = 96500C, molar gas volume stp =22.4dm3
Date posted: October 29, 2019. Answers (1)
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(i) 8cm of...(Solved)
Two experiments were carried out as follows and the volume of hydrogen gas evolved measured at intervals of 10 seconds for 100 seconds.
(i) 8cm of magnesium ribbon was added to 1M hydrochloric acid
(ii) 8cm of magnesium ribbon was added to 0.5M hydrochloric acid
Graphs of volume of hydrogen evolved against time were plotted
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(ii) Explain the general shape of the graph
Date posted: October 29, 2019. Answers (1)
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Date posted: October 29, 2019. Answers (1)
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Date posted: October 29, 2019. Answers (1)
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