CHM191 TMA Question and answer
Q1 In redox titration involving potassium permanganate, if the contents of the conical flask turn brown, it means _____was added...
Q2 Potassium permanganate is a self-indicating reagent because of its different characteristic _______ in either the acidic or basic medium
Q3 Potassium permanganate can be used to estimate the ________of a substance
Q4 IO$${_3}{^2-}$$ + SO$${_3}{^2+}$$ → I +SO$${_4}{^2-}$$ The oxidation state of oxygen in the product’s equation is______
Q5 IO$${_3}{^2-}$$ + SO{_3}{^2}$$+ the oxidation state of oxygen in the equation is ______
Q6 A substance which loses water of hydration upon exposure to atmosphere is called?
Q7 Volumetric analysis involving iodine are usually referred to as___________
Q8 In the _____, standard solutions of iodine are used to estimate directly the concentrations of some oxidizable species.
Q9 Of all the oxidizable species available for use, iodine titration are usually used with the___
Q10 The colour changes accompanying the varying change in oxidation states of iodine and its ion can be used to indicate the________
Q11 The most commonly used external indicator for iodine titration is_________
Q12 The starch solution forms a _______complex with the tri-iodide ion during the titration that is rapidly discharge at the end point
Q13 Thus using starch as indicator, the colour variations of the solution depend on ______formation of the starch with iodide ion formed in the last stage of the titration.
Q14 For this reason and in order to avoid complications in the end point detection, the starch indicator is added at the______ colouration of the solution which is near the end point
Q15 Complete the colour change in iodometry analysis. _______(initially)→
Q16 Light yellow colouration is observed at near end point of the iodometry analysis. True or false___
Q17 During iodometry analysis the blue black colouration appear at the end of the titration. True or false_____
Q18 The oxidation potentials of Na is________
Q19 The study of thermal changes in chemical and physical processes is known as________
Q20 The _________is the amount of heat released or observed for a given amount of reactants or products
Q21 Predict the colour of methyl orange when $$p{^H}$$ is 8?
Q22 At complete neutralization point, the litmus paper colour turns?
Q23 At neutralization point the $$P{^H}$$ value is?
Q24 What is a $$P{^H}$$ of a solution?
Q25 In an acid base titration conducted by a student the colour of the solution in the beaker changed from colourless to pink when phenolphthalein was used as an indicator, what went wrong?
Q26 Which of the following options is an indicator use for acid-base titration?
Q27 The point at which stoicheometrically equivalent quantities of substance have been brought together is known as?
Q28 The concentration of pure HCl 11.7 Molar if $$20 cm{^3}$$ of the acid is diluted to $$250 cm{^3}$$ to give concentration of $$0.936 mol.dm{^3}$$ substitute this values on this equation; CIVI=C2V2?
Q29 Give reason why water should not be added to acid during carrying out acid-base titration?
Q30 A table of requirement for laboratory experiment contains the following except?
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