Write the chemical equations to represent the following reactions.
(a) The oxidation of `HCI (aq)` to `Cl_(2) (g)` by `PbO_(2)`.
(b) The disproportionation of `SnO` to `Sn` and `SnO_(2)`.
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Write balanced chemical equations for the following reactions : (a) Hypophosphorus acid is added to`AgNO_(3)` solution (b) Chlorine gas is passed thro
(a) `H_(3)PO_(3)+2AgNO_(3) +H_(2)O to 2Ag +2HNO_(3) +H_(3)PO_(4)` (b) `3Cl_(2)+6NaOH("Conc.") to 5 NaCl+NaClO_(3)+3H_(2)O` (c ) `2XeF_(2) +2H_(2)O to 2Xe +O_(2)+4HF`.
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Complete the following chemical equations for reactions in aqueous solution. (i) `Cr_(2)O_(7)^(2-)+H^(+)+Fe^(2+) to ` (ii) `MnO_(4)^(-)+I^(-)+H^(+) to
(i) `Cr_(2)O_(7)^(2-)+14H^(+)+6Fe^(2+) to 2Cr^(3+)+6Fe^(3+)+7H_(2)O` (ii) `2MnO_(4)^(-)+16H^(+)+10I^(-) to 2Mn^(2+)+5I_(2)+8H_(2)O`. (iii) `2MnO_(4)^(-)+5C_(2)O_(4)^(2-)+16H^(+) to 2Mn^(2+)+10CO_(2)+8H_(2)O`.
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Write the balanced chemical equations for the following reactions (i) A mixture of potassium dichromate and sodium chloride is heated with concentrate
(a) `({:(K_(2)Cr_(2)O_(7)+2H_(2)SO_(4)to KHSO_(4)+2CrO_(3)+H_(2)O),(NaCl+H_(2)SO_(4)to NaHSO_(4)+HCLxx4),(2CrO_(3)+4HCl to 2CrO_(2)Cl_(2)+2H_(2)O):})/(K_(2)Cr_(2)O_(7)+4NaCl+6H_(2)SO_(4) to 2CrO_(2)Cl_(2)+4NaHSO_(4)+2KHSO_(4)+3H_(2)O)`
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A solution of HCI is prepared by dissolving 5.5 g HCI in 200 g ehanol. The density of the solution is 0.79 g `mL^(-1)` Molarity of solution is :
Correct Answer - a `"Molarity (M)"=("Mass of HCI//Molar mass")/("Volame of solution in litrese")` Mass of HCI solution = 200+5.5=205.5 g Density of solution = 0.79 g `mL^(-1)` `"Volume of solution"=((205.5g))/((0.79gmL^(-1)))` =260L...
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The molarity of a solution obtained by mixing 750 mL of 0.5dsM solution of HCI with 250 mL of 2M solution of HCI will be :
Correct Answer - c `M_(3)V_(3)=M_(1)V_(1)+M_(2)V_(2)` `M_(3)=((0.5M)xx(750mL)+(250 mL))/((750 mL+250 mL))` 0.875 M.
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25mL of 3.0 M HCI are mixed with 75 of 4.0 M HCI. If the volumes are volumes are aditive, the molarity of the final solution will be :
Correct Answer - b If the two solutions containing the same solute are mixed, the molarity of the resulting solution is given as : `M_(3)V_(3)=M_(1)V_(1)+M_(2)V_(2)` `M_(3)=(M_(1)V_(1)+M_(2)V_(2))/V_(3)=(M_(1)V_(1)+M_(2)V_(2))/((V_(1)+V_(2)))` `=((3.0M)xx(25mL)+(4.0M)xx(75mL))/((25+75)mL)` =3.75 M
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you are supplied with 500 mL each so 2N HCI and 5N HCI. What is the maximym volume of 3M HCI that you can can prpare using only these two solutions ?
Correct Answer - c For solution, consult Example 2,14 (Text part).
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Calculate the standard potential for the reaction, `Hg_(2)Cl_(2)+Cl_(2) rarr 2Hg^(2+)+4Cl^(-)` Given : `{:(Hg_(2)Cl_(2)+2e^(-) rarr 2Hg+2Cl^(-),,E^(@)
Correct Answer - `-0.08` volt First determine `E^(@)` for `Hg_(2)Cl_(2) rarr 2Hg^(2+) +2Cl^(-) +2e^(-)` electrode. It comes to -1.44 volt. This electrode is now coupled with `Cl_(2)+2e^(-) rarr 2Cl^(-)` electrode.
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In which chemical reaction does carbon exibit variation of oxidation state from -4 to +4 ? Write balanced chemical reaction.
In combustion of methane, Carbon exhibits variation from -4 to +4. The reaction is as follows : CH4 + 2O2 → CO2 + 2H2O In CH4, The oxidation state of carbon is -4 while in...
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Write the chemical equations involved in the following reactions: (i) Hoffmann-bromamide degradation reaction (ii) Carbylamine reaction
Hoffmann-bromamide degradation reaction : It is given by the primary amine having one carbon less. `underset(1^(@)"amide")(R-CON)H_(2) + Br_(2) + 4KOH to underset((1^(@)"amine"))(RNH_(2)) + K_(2)Co_(3) + 2KBr + 2H_(2)O` (ii) Carbylamine...
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