default_background
✕

Find the best tutors and institutes for Class 12 Tuition

Find Best Class 12 Tuition

Please select a Category.

Please select a Locality.

No matching category found.

No matching Locality found.

Q3.6(i):
A reaction is second order with respect to a reactant. How is the rate of reaction affected if the concentration of the reactant is (i) doubled

Solution :

Step 1: Establishing the Rate Law Expression

For a reaction that is second order with respect to a specific reactant, the rate of reaction ($r$) is mathematically expressed as the product of the rate constant ($k$) and the square of the molar concentration of the reactant ($[A]$).

The rate law is defined as:

$r_1 = k[A]^2$

[Per the definition of the Rate Law, where the exponent represents the order of the reaction with respect to the reactant].

Step 2: Defining the Condition of Doubled Concentration

When the concentration of the reactant is doubled, the new concentration $[A]_2$ is defined in terms of the initial concentration $[A]_1$:

$[A]_2 = 2[A]_1$

Step 3: Calculating the New Rate of Reaction

To determine the effect on the rate, we substitute the new concentration into the rate law equation to find the new rate ($r_2$):

$r_2 = k[A]_2^2$

Substituting $[A]_2 = 2[A]_1$ into the equation:

$r_2 = k(2[A]_1)^2$

[By algebraic expansion of the square term $(ab)^n = a^n b^n$]:

$r_2 = k(4[A]_1^2)$

$r_2 = 4(k[A]_1^2)$

Step 4: Comparative Analysis

Since the initial rate was defined as $r_1 = k[A]_1^2$, we substitute $r_1$ into the expression for $r_2$:

$r_2 = 4r_1$

Concentration [A] Rate (r) r = k[A]²

The mathematical derivation confirms that increasing the concentration of a second-order reactant by a factor of 2 results in a quadrupling of the reaction rate, as the rate is proportional to the square of the concentration.

Final Solution: The rate of the reaction becomes 4 times the initial rate.


More Questions from Class 12 Chemistry Chemical Kinetics Exercises


CBSE Solutions for Class 12 Chemistry Chemical Kinetics


Chapters in CBSE - Class 12 Chemistry


Top Tutors who teach Chemical Kinetics

(15)
Top Tutor
locationImg Tezpur Airpur Area, Tezpur
experience 7 yrs of Exp students 2 students
greenClock 421 hrs of classes completed
rsIcon 450 per hour
Maths teacher with 7 years of experience
Online Classes Online Classes
regularClasses Tutor's home

I am a mathematics teacher. I have been working in schools from last 6-7 years , and i was giving tutions at my home and even in an insitute in delhi from last 5-7 years. I shifted to tezpur,Assam in April 2021. my last job was in air force school hindan and I currently work at Air force school tezpur. i have a degree in msc mathematics and b.ed. i teach mathematics upto class 12. my key skills are in ms office , mathematics project, calligraphy , and can help out students in their various activities.

Skills: Mathematics
Also teaches: Class 11 Tuition, Class 10 Tuition and more

(16)
superTutorSuper Tutor
locationImg Bilekahalli, Bangalore
experience 6 yrs of Exp students 9 students
greenClock 314 hrs of classes completed
rsIcon 500 per hour
A Student Friendly Chemistry Teacher with 7 Years Teaching Experience To CBSE Board
Online Classes Online Classes

I teach Chemistry to students of Class 11 and Class 12 and have been working in the teaching field for the past 7 years. Chemistry has always been a subject that I am passionate about, and I enjoy helping students understand concepts clearly and perform confidently in academics as well as competitive examinations. My goal is to make Chemistry simple, logical, and interesting for students through structured and concept-focused learning. I hold a Master of Science (M.Sc.) degree in Chemistry, which has provided me with strong subject knowledge and a deeper understanding of various chemical concepts. My academic background helps me explain topics in a clear and systematic way so that students can easily understand and apply them while solving numerical and theoretical questions. Over the years, I have worked with students from different learning backgrounds and understanding levels. This experience has taught me the importance of adapting teaching methods according to the student’s requirements. I focus on helping students strengthen their conceptual understanding, improve their analytical and problem-solving skills, and gain confidence in handling Chemistry effectively for both board exams and competitive exams. My teaching methodology is structured, student-centric, and exam-oriented. I follow a well-planned lesson structure where topics progress step by step from basic to advanced levels. Before starting a new topic, I assess the student’s current understanding level so that I can explain concepts in the most effective manner. I also use suitable real-life examples to simplify complex chemical concepts and make learning more relatable and easier to understand. I strongly believe that conceptual clarity is more important than rote learning. During my classes, I encourage students to ask questions freely and clear doubts without hesitation. If a student finds a concept difficult, I patiently re-explain it multiple times until complete understanding is achieved. I also conduct regular revision sessions, exercise practice, and detailed discussions of previous years’ board and competitive examination questions to strengthen preparation and retention. I conduct both online and offline classes depending on the convenience of students. During my sessions, I use PPT presentations and whiteboard explanations to make learning more organized, visual, and engaging. My classes are interactive and focused on building confidence, helping students solve problems independently, and preparing them effectively for examinations. As a teacher, my aim is to help students develop a strong foundation in Chemistry and remove the fear many students have towards the subject. I believe that with the right guidance, regular practice, and conceptual understanding, every student can excel in Chemistry. Helping students improve academically and achieve success in their exams continues to motivate me in my teaching journey.

Raihan ..

As per my son's experience, he clears all the concepts and teaches very well, explaining repeatedly until it is fully understood.

Skills: Chemistry
Also teaches: Class 11 Tuition

Sujeet B. Class 12 Tuition trainer in Bangalore
(11)
superTutorSuper Tutor
locationImg Kasavanahalli Main Rd Kasavanahalli, Bangalore
experience 2 yrs of Exp students 6 students
greenClock 882 hrs of classes completed
rsIcon 800 per hour
Personalized sessions for Artificial Intelligence, ML, Computer Science, and Mathematics
Online Classes Online Classes

I am a teacher. I love teaching and want to share my knowledge with my students. I will take online classes. My approach combines clear concepts, regular practice, and student-friendly strategies to make learning effective and enjoyable.

Amit Sardana

"Found it to be a very intuitive learning methodology, practical approach, helpful in understanding."

Skills: Mathematics , Physics and more

Lubna F. Class 12 Tuition trainer in Karari
(11)
Top Tutor
locationImg Zafarpur Mahawan, Karari
experience 10 yrs of Exp students 6 students
greenClock 287 hrs of classes completed
rsIcon 400 per hour
Certified in Finance (from IIM) with over 20 years of experience of teaching in CBSE school
Online Classes Online Classes
regularClasses Tutor's home

I am an experienced, qualified teacher and tutor with over 20 years of experience in teaching accountancy, business studies and English literature in CBSE school. Passionate about communication in English, over the years I have helped thousands of students overcome their stage fright and nervousness in expressing themselves in public. So far, I have worked with Dr. Rizvi Springfield School (Prayagraj) and Global Classroom, Lucknow (branch of CMS) and currently freelancing with Planet Spark as an Expert in Public Speaking & Creating Writing. I specialize in teaching Accountancy and Business Studies to classes 11 and 12, along with Spoken English. With a strong academic background, including a B. Com., M. Com., and an M.Ed., as well as completing a Management Development Program, I bring a wealth of knowledge and expertise to my teaching. With over 22 years of administrative experience and 10 years of teaching, I have had the privilege of holding key roles such as PGT English, Commerce teacher, Headmistress, and Principal. These experiences have helped me develop a profound understanding of education, enabling me to cater to the unique needs of my students effectively. Teaching has been the most enjoyable and fulfilling part of my professional journey. Over the years, I have built strong connections with my students, fostering an environment of trust and growth. My passion for education has been recognized through several accolades, including a prestigious Principal Award in Delhi. I conduct online classes where I follow a structured lesson plan to ensure my sessions are engaging and interactive. I use PPTs and videos to make concepts clear and relatable, catering to the diverse learning styles of my students. I also provide comprehensive notes and content to support my students' learning and revision. These resources are meticulously prepared to align with the curriculum and focus on enhancing students’ understanding and performance. My approach to teaching is rooted in creating a supportive and motivating environment. I am committed to helping my students achieve their academic and personal goals while instilling confidence and a love for learning in them. Teaching is not just my profession; it is my passion and purpose.

Skills: Accountancy , Business Studies
Also teaches: BCom Tuition, Spoken English and more

(17)
Top Tutor
locationImg Sector-40, Chandigarh
experience 10 yrs of Exp students 3 students
greenClock 12 hrs of classes completed
rsIcon 500 per hour
i will give result either your money back , syllbus will be finished in 3 months and then revision.
Online Classes Online Classes
homeTutions Student's Home
regularClasses Tutor's home

m baljinder kaur professor in punjab university chandigarh. i have 10 years of experience. i taught 4 years in aakash institute to JEE and NEET level students also.

Skills: Mathematics , Physics and more
Also teaches: NEET-UG Coaching, Class 10 Tuition and more

Other Subjects in CBSE - Class 12

Worksheet Icon

Download free CBSE - Class 12 Chemistry Chemical Kinetics Exercises worksheets

Download Now

Find Best Class 12 Tuition ?

Find Now »