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Recent questions tagged concentration
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What is the concentration of $A$ at time $45\;s$ if $[A]_o = 1\;M$, $[B]_o = 45\;M$, and 2nd order rate constant is $0.6\;M^{-1}s^{-1}$?
jeemain
chemistry
chemical-kinetics
physical-chemistry
class12
ch4
rate-of-reaction
pseudo-first-order-reactions
medium
half-life
concentration
asked
Jul 25, 2014
by
balaji.thirumalai
1
answer
A certain first order reaction proceeds through t first order kinetics. The half-life of the reaction is 180 s. What percent of the initial concentration remains after 900s?
cl51249
jeemain
chemistry
chemical-kinetics
physical-chemistry
class12
ch4
rate-of-reaction
general-characteristics
concentration
medium
first-order-reactions
half-life
asked
Jul 24, 2014
by
balaji.thirumalai
1
answer
From the integrated rate law for a first order reaction, $ [A] = [A]_0\; e^{-kt}$. Suppose rate constant, $k = 2.95 X 10^{-3} s^{-1}$, What percent of $A$ remains after $150 \;s$?
jeemain
chemistry
chemical-kinetics
physical-chemistry
class12
ch4
rate-of-reaction
general-characteristics
concentration
medium
first-order-reactions
asked
Jul 24, 2014
by
balaji.thirumalai
1
answer
How much $CaCO_3$ is present in 100ml of 1000ppm $CaCO_3$ solution?
jeemain
chemistry
class12
unit2
solutions
q96
easy
composition-of-a-solution
concentration
asked
Feb 14, 2014
by
sreemathi.v
1
answer
1000 mL of aqueous solutions of $CaCO_3$ contains 1 gm of carbonate,concentration of the solution is
jeemain
chemistry
class12
ch2
solutions
q96
easy
composition-of-a-solution
concentration
asked
Feb 14, 2014
by
sreemathi.v
1
answer
What is the mole fraction of benzene in solution containing 20% by mass in $CCl_4$?
jeemain
chemistry
class12
ch2
solutions
q10
easy
composition-of-a-solution
concentration
physical-chemistry
asked
Feb 12, 2014
by
sreemathi.v
1
answer
The rate law for decomposition of $N_2O_5: N_2O_5\rightarrow 2NO_2+\large\frac{1}{2}$$O_2$ is consistent with observed rate law.If $k'=5\times 10^{-4}s^{-1}$ the time required for $[N_2O_5]$ be reduced to 10% of its original value.
jeemain
chemistry
chemical-kinetics
physical-chemistry
class12
ch4
rate-of-reaction
difficult
concentration
asked
Dec 19, 2013
by
sreemathi.v
1
answer
For reversible reaction,$X\;\;\overset{\overset{k_1}{\rightleftharpoons}}{k_2}\;\;Y$.$k_1=2hr^{-1}$ and $\large\frac{[X_{eq}]}{[Y_{eq}]}$$=6$.If $[X_0]=2M,[Y_0]=0M$.What will be the the concentration of Y after 1hr?
jeemain
chemistry
chemical-kinetics
physical-chemistry
class12
ch4
rate-of-reaction
concentration
difficult
asked
Dec 19, 2013
by
sreemathi.v
1
answer
A solution of A is mixed with equal volume of a solution of B containing the same number of moles,for reaction $A+B\rightarrow C$.At the end of 1 hour,A is 75% reacted.How much of A will be left unreacted at the end of 2hours if the reaction is first order in A & zero order in B.
jeemain
chemistry
chemical-kinetics
physical-chemistry
class12
ch4
rate-of-reaction
concentration
medium
asked
Dec 18, 2013
by
sreemathi.v
1
answer
It take 40min for concentration of reactant in first order to drop from 0.4M to 0.3M at $25^oC$.How long it will take for reaction to be 90% complete?
jeemain
chemistry
chemical-kinetics
physical-chemistry
class12
ch4
rate-of-reaction
concentration
medium
asked
Dec 18, 2013
by
sreemathi.v
1
answer
If a reactant is used up according to a first order rate equation and initial concentration of reactant is $32mol\;L^{-1}$ what is concentration of reactant after six half lives have passed?
jeemain
chemistry
chemical-kinetics
physical-chemistry
class12
ch4
half-life
concentration
easy
asked
Dec 18, 2013
by
sreemathi.v
1
answer
For the given sequential reaction $A\;\underrightarrow{k_1}\;B\;\underrightarrow {k_2}C$ the concentration of A,B & C at any time 't' is given by $[A]_t=[A]_oe^{-k_1t};[B]_t=\large\frac{k_1[A_o]}{k_2-k_1}$$[e^{-k_1t}-e^{-k_2t}];[C]_t=[A_o]-([A]_t-([A]_t+[B]_t)$.The time at which a concentration of B is maximum is
jeemain
chemistry
chemical-kinetics
physical-chemistry
class12
ch4
concentration
easy
asked
Dec 16, 2013
by
sreemathi.v
1
answer
For the given sequential reaction $A\;\overset{k_1} \rightarrow \;B\;\overset{k_2} \rightarrow C$ the concentration of A,B & C at any time 't' is given by $[A]_t=[A]_oe^{-k_1t};[B]_t=\large\frac{k_1[A_o]}{k_2-k_1}$$[e^{-k_1t}-e^{-k_2t}];[C]_t=[A_o]-([A]_t-([A]_t+[B]_t)$.The maximum concentration of $[B]$ is
jeemain
chemistry
chemical-kinetics
physical-chemistry
class12
ch4
concentration
difficult
asked
Dec 16, 2013
by
sreemathi.v
1
answer
The rate constant for a first order reaction is 2.What will be the concentration of A for reaction .$A\rightarrow B$ if $[A_o]=1M$
jeemain
chemistry
chemical-kinetics
physical-chemistry
class12
ch4
rate-of-reaction
general-characteristics
easy
concentration
asked
Dec 13, 2013
by
sreemathi.v
1
answer
The initial rate for zero order reaction of the gaseous reaction $A(g)\rightarrow 4B(g)$ is $10^{-3}Msec^{-1}$. If the initial concentration of $A$ is $0.01\;M$ after $2\;sec$. Concentration of $B$ should be
jeemain
chemistry
chemical-kinetics
physical-chemistry
class12
ch4
rate-of-reaction
general-characteristics
concentration
zero-order-reactions
easy
asked
Dec 13, 2013
by
sreemathi.v
1
answer
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