State the order with respect to each reactant and overall reaction.
H2 O + 3I- + 2H+- = > 2H 2 O + I3-
Rate = k[H2 O2 ]1 [I]1
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Write the overall reaction taking place in rusting.
2Fe + O2 + 4H+ --> 2Fe2+ +2H2 O
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State the order with respect to each reactant and overall reaction.
Order of reaction =1+1=2
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After ve half-life periods for a rst order reaction, what fraction of reactant remains ? A
your the answer 1/32
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For a reaction R=> P, the rate becomes 2 times when the concentration of the reactant A is increased 4 times. What is the order of reaction ?
r = k(a)n => 2r = k(4a)n =>2 = 4n => n = 0.5
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In some cases large number of colliding reactant molecules have energy more than threshold energy even then the reaction is slow. Why ?
Because resultant molecules do not collide in proper orientation.
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For a rst order reaction time taken for half of the reaction to complete is t 1 and 3/4 of the reaction
t 2 = 2t 1 because for 3/4th of the reaction to complete time required is equal to two half lives
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How are the following colloids different from each other in respect of dispersion medium and dispersed medium ? Give one example of each type.
[Hint : D.P. D.M. Example (a) Solid/liquid ...
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In a first order reaction, the concentration of the reactant, decreases from 0.8M to 0.4M in 15minutes.
(a) : The concentration of the reactant decreases from 0.8M to 0.4M in 15 minutes, i.e. t1/2 = 15 minute. Therefore, the concentration of reactant will fall from 0.1M to 0.025M in two...
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How are the following colloids different from each other in respect of dispersion medium and dispersed phase? Give one example of each type.
Type of Colloid Dispersed Phase Dispersion medium Example Aerosol Solid or liquid Gas Smoke, Fog, Cloud Hydrosol Solid Water Starch sol, Protein sol Emulsion Liquid Liquid Milk, hair cream
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A reaction is of first order in reactant A and of second order in reactant B.
According to the given reaction: Rate = k [A] [B]2 (i) When the concentration of reactant ‘B’ is increased three times the rate of reaction becomes 9 times. i.e., Rate = k [A]...
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