(a)In solid state,ions in lead (ii) bromide immobile while in fused state,ions become mobile hence
electric current flows
(b)(i) At the anode
$2Br^{-}{(aq)}\rightarrow 2e^{-}+Br_2{(g)}$
(ii)At cathode
$Pb^{2+}+2e^(-)\rightarrow Pb{(s)}$
(c)Experiment done in fume chamber $Br^{2-}$fumes are poisonous
isaacmuthini answered the question on November 23, 2017 at 06:19
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The diagram below represents a chromatogram of different pigments of leaf extract
(Solved)
The diagram below represents a chromatogram of different pigments of leaf extract
(a)Name a suitable solvent for the dye.
(b)State with a reason,the least soluble pigment in the solvent used.
Date posted:
November 22, 2017
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Answers (1)
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1.2 liters of hydrogen gas produced at room temperature and pressure when 3.27 g of zinc was used.Determine the...
(Solved)
1.2 liters of hydrogen gas produced at room temperature and pressure when 3.27 g of zinc was used. Determine the relative atomic mass of zinc.
Date posted:
November 22, 2017
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Answers (1)
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Study the flow chart below and answer questions that follow.
(Solved)
Study the flow chart below and answer questions that follow.
(a)Identify the following;
solid T
Gas L
(b)Describe how process V is carried out.
Date posted:
November 22, 2017
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Answers (1)
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Study the set up below and answer the questions that follow;
(Solved)
Study the set up below and answer the questions that follow;
(a)Identify gas D
(b)Write an equation for the reaction taking place
In the combustion tube
Date posted:
November 22, 2017
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Answers (1)
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The diagram below represents a burning jiko.
(Solved)
The diagram below represents a burning jiko.
(a)Write down the equation for the reactions taking place at;
A.........................
B.........................
(b)Why is it dangerous to use a jiko in a closed room
Date posted:
November 22, 2017
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Answers (1)
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Study the set up below and answer questions that follow. State and explain the observations that would be made when the circuit is completed.
(Solved)
Study the set up below and answer questions that follow.
State and explain the observations that would be made when the circuit is completed.
Date posted:
November 22, 2017
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Answers (1)
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The diagram below shows part of the solvay process.
(Solved)
The diagram below shows part of the solvay process.
(a)Name solid X
(b)State the process taking place in chamber C
Date posted:
November 22, 2017
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Answers (1)
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Below is an ionic electronic structure of element X.
(Solved)
Below is an ionic electronic structure of element X.
Write down the:
(i)Period in which X belong
(ii)Formula of its chloride
Date posted:
November 22, 2017
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Answers (1)
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Study the flow chart below and answer the questions that follow (a)Name substances: (i)P (ii)colourless gas (b)Write balanced stoichiometric equation for the reaction:
(Solved)
Study the flow chart below and answer the questions that follow
(a)Name substances:
(i)P
(ii)colourless gas
(b)Write balanced stoichiometric equation for the reaction:
(i)Thermal decomposition of P
(ii)Producing coloourless solution S
(c)Write the ionic equations for the formation of Solid P
(d)Name process B
Date posted:
November 22, 2017
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Answers (1)
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Calculate the normality of a solution containing 3.15g of hydrated oxalic axid (H2C2O4.2H2O) in 250ml of solution,take the molar mass to be 126
(Solved)
Calculate the normality of a solution containing 3.15g of hydrated oxalic axid (H2C2O4.2H2O) in 250ml of solution,take the molar mass to be 126
Date posted:
November 21, 2017
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Answers (1)
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State any two uses of hydrogen gas in the fertilizer industry
(Solved)
State any two uses of hydrogen gas in the fertilizer industry
Date posted:
November 20, 2017
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Answers (1)
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State the two types of elemental analysis and their definitions.
(Solved)
State the two types of elemental analysis and their definitions.
Date posted:
November 20, 2017
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Answers (1)
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State the Lewis concept
(Solved)
State the Lewis concept
Date posted:
November 20, 2017
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Answers (1)
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Explain how an increase in pressure would affect equilibrium position
(Solved)
Explain how an increase in pressure would affect equilibrium position
Date posted:
November 19, 2017
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Answers (1)
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Define entropy
(Solved)
Define entropy
Date posted:
November 18, 2017
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Answers (1)
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State Pauli exclusion principle
(Solved)
State Pauli exclusion principle
Date posted:
November 18, 2017
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Answers (1)
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State aufbau principle
(Solved)
State aufbau principle
Date posted:
November 18, 2017
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Answers (1)
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Calculate the molarity of an aqueous solution containing 3g of urea (molar mass=60) in 250g of H2O
(Solved)
Calculate the molarity of an aqueous solution containing 3g of urea (molar mass=60) in 250g of H2O
Date posted:
November 18, 2017
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Answers (1)
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Name the first 10 elements of the periodic table of elements in their correct order.
(Solved)
Name the first 10 elements of the periodic table of elements in their correct order.
Date posted:
November 17, 2017
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Answers (1)
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The diagram below was used to prepare an alkane in the laboratory
(Solved)
The diagram below was used to prepare an alkane in the laboratory
(i)Write the formular of solid X
(ii)Explain why calcium oxide is added to the mixture above
(iii)Write a balanced equation for the reaction that occurs in the flask
Date posted:
November 16, 2017
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Answers (1)