(i) Bauxite – Al2O3. H2O
(ii) Iron II oxide
- Silica
(iii) Being ionic, it is only an electrolyte in its molten state. Heating helps to melt it.
maurice.mutuku answered the question on November 1, 2019 at 06:28
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The flow chart below shows steps used in the extraction of zinc from one of its ores.
(a) Name the process that is used in step 2 to concentrate the ore
(b) Write an equation for the reaction which takes place in step 3
Date posted: November 1, 2019. Answers (1)
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Study the information provided:-
Explain why the melting point of the oxide of W is lower than that of the oxide of Z
Date posted: November 1, 2019. Answers (1)
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(i) CCl4
(ii) HOCl(Solved)
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(i) CCl4
(ii) HOCl
Date posted: November 1, 2019. Answers (1)
- The stages shown in the following diagram can be used to extract zinc from its oxide.
Name the stage and the process taking place in it:-(Solved)
The stages shown in the following diagram can be used to extract zinc from its oxide.
Name the stage and the process taking place in it:-
Stage 1
Stage 2
Stage 3
Date posted: November 1, 2019. Answers (1)
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Date posted: November 1, 2019. Answers (1)
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reasons for your answer
Date posted: November 1, 2019. Answers (1)
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Give one environmental hazard associated with the extraction of zinc metal
Date posted: November 1, 2019. Answers (1)
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You are provided with 20.0cm3 of 2M sodium hydroxide solution. Explain how you would prepare a solution of sodium hydroxide whose concentration is 0.16M.
Date posted: October 31, 2019. Answers (1)
- State one use of each of the following radioactive isotopes.
i)Cobalt – 60
ii)Phosphorus – 32 (Solved)
State one use of each of the following radioactive isotopes.
i)Cobalt – 60
ii)Phosphorus – 32
Date posted: October 31, 2019. Answers (1)
- The graph below shows the changes in viscosity in liquid sulphur on heating. Use it to answer the questions that follow.
Explain what happens in the...(Solved)
The graph below shows the changes in viscosity in liquid sulphur on heating. Use it to answer the questions that follow.
Explain what happens in the region:
i)XY
ii)YZ
Date posted: October 31, 2019. Answers (1)
- A sample of 0.5g of gaseous alkane occupied a volume of 200cm3 at s.t.p.
a)Determine the molar mass of the alkane.(C = 12.0, H = 1.0,...(Solved)
A sample of 0.5g of gaseous alkane occupied a volume of 200cm3 at s.t.p.
a)Determine the molar mass of the alkane.(C = 12.0, H = 1.0, Molar gas volume = 22.4dm3)
b)Determine the molecular formula of the alkane and give its I.U.PA.C name.
Date posted: October 31, 2019. Answers (1)
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Study the table below and complete the property column.
Date posted: October 31, 2019. Answers (1)
- Consider the following standard electrode potentials:(Solved)
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Some modern cars are made from steel coated with other metals. Using this data above state and explain the best suited metal for coating steel
Date posted: October 31, 2019. Answers (1)
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Calculate the mass of metal J that would be dissolved at the anode when a solution of J (III) nitrite is electrolysed using a current of 1.5amperes for 15minutes (1 Faraday = 96,500C; J = 52)
Date posted: October 31, 2019. Answers (1)
- The following are standard reduction potentials;(Solved)
The following are standard reduction potentials;
Rewrite the 
values of the above half-cells using iron as a reference electrode
Date posted: October 31, 2019. Answers (1)
- Complete the following redox equations by adding the correct number of electrons on either
reactant or product side of the redox equations:-(Solved)
Complete the following redox equations by adding the correct number of electrons on either
reactant or product side of the redox equations:-
Date posted: October 31, 2019. Answers (1)
- The following diagram represents the electrolysis of dilute sodium chloride solution using inert
electrodes(Solved)
The following diagram represents the electrolysis of dilute sodium chloride solution using inert
electrodes
Determine the electrode at which different electrolytic products would be produced if the solution is electrolysed for several hours. Explain
Date posted: October 31, 2019. Answers (1)
- Use the cell representation below to answer the questions that follow:-(Solved)
Use the cell representation below to answer the questions that follow:-
X(s) /X3+(aq) //W2+(aq) /W(s)
(a) Write the equation for the cell reaction above
(b) If the e.m.f of the cell is 0.30V and value for W2+/W is -0.44volts, calculate the for X3+(aq) /X(s)
Date posted: October 31, 2019. Answers (1)
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Name two types of isotopes of phosphorous
Date posted: October 31, 2019. Answers (1)
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The following are electrode potentials of the half cells
Calculate the potential difference of the following cell.
Date posted: October 31, 2019. Answers (1)