default_background
✕

Find the best tutors and institutes for Class 10 Tuition

Find Best Class 10 Tuition

Please select a Category.

Please select a Locality.

No matching category found.

No matching Locality found.

Q5(d):
Translate the following statements into chemical equations and then balance them. (d) Potassium metal reacts with water to give potassium hydroxide and hydrogen gas.

Solution :

Step 1: Identification of Reactants and Products

Based on the provided statement, we identify the chemical species involved in the reaction:

  • Reactants: Potassium metal ($K$) and Water ($H_2O$).
  • Products: Potassium hydroxide ($KOH$) and Hydrogen gas ($H_2$).

[Justification: Per the Law of Conservation of Mass, the total mass of reactants must equal the total mass of products in a closed system.]

Step 2: Skeletal Chemical Equation

Translating the names of the substances into their respective chemical formulas, we obtain the unbalanced skeletal equation:

$K(s) + H_2O(l) \rightarrow KOH(aq) + H_2(g)$

Step 3: Atomic Accounting and Balancing

We enumerate the number of atoms for each element on both sides of the equation to determine the required stoichiometric coefficients:

Element Reactant Side (LHS) Product Side (RHS)
Potassium (K) 1 1
Hydrogen (H) 2 3 (1 + 2)
Oxygen (O) 1 1

To balance the Hydrogen atoms, we apply a coefficient of $2$ to $H_2O$ and $2$ to $KOH$:

$K(s) + 2H_2O(l) \rightarrow 2KOH(aq) + H_2(g)$

Now, we re-examine the Potassium (K) count:

  • Reactants (K): $1$
  • Products (K): $2$

To balance the Potassium atoms, we apply a coefficient of $2$ to the Potassium ($K$) reactant:

$2K(s) + 2H_2O(l) \rightarrow 2KOH(aq) + H_2(g)$

Step 4: Verification of Atom Balance

Final count check:

  • K: $2$ (LHS) = $2$ (RHS)
  • H: $4$ (LHS: $2 \times 2$) = $4$ (RHS: $2 \times 1 + 2$)
  • O: $2$ (LHS: $2 \times 1$) = $2$ (RHS: $2 \times 1$)

[Justification: The equation is now balanced in accordance with the Law of Conservation of Mass.]

2K(s) + 2H₂O(l) → 2KOH(aq) + H₂(g) Balanced Chemical Equation

Final Solution: 2K(s) + 2H_2O(l) \rightarrow 2KOH(aq) + H_2(g)


More Questions from Class 10 Science Chemical Reactions and Equations EXERCISES


CBSE Solutions for Class 10 Science Chemical Reactions and Equations


Chapters in CBSE - Class 10 Science


Top Tutors who teach Chemical Reactions and Equations

(31)
Top Tutor
locationImg Shivaji Nagar, Nagpur
experience 18 yrs of Exp students 7 students
greenClock 318 hrs of classes completed
rsIcon 350 per hour
Computer Science Educator with25 years of teaching experience of onlie and Offline education
Online Classes Online Classes

I have given tuition for Computer Application for class X and IX., XII, XIII Result oriented teaching. Help students to improve the percentage

Isha Singh

An excellent tutor .My daughter's understanding of the subject developed over the months and she was able to score better marks.

Skills: Computer Application
Also teaches: MCA Coaching, Java Training and more

(5)
Top Tutor
locationImg Pirbaba More, Kharagpur
Spoken English, Bengali and Academic English from Class I-X with 1 year experience
Online Classes Online Classes

I have been a proficient and consistent English student for almost my entire academic life. My proficiency in English comes from my very schooling background in a well know Convent school in my town. I would like to help anyone who wants to speak English with proficiency. always remember "Better late, than never"

Skills: English
Also teaches: Bengali Speaking, Class 7 Tuition and more

(77)
superTutorSuper Tutor
locationImg T Nagar, Chennai
experience 10 yrs of Exp students 51 students
greenClock 1339 hrs of classes completed
rsIcon 500 per hour
BDS Graduate [Govt Dental College Chennai] | NEET Biology&Chemistry | Class10 Science & Maths Tutor
Online Classes Online Classes

Teaching Experience in Detail (Class 10 Tuition) I have over 10 years of experience teaching CBSE, ICSE, and State Board Class 10 students, helping them achieve excellent results in their board examinations through a structured and concept-oriented teaching approach. I specialize in Science, Mathematics, Social Science, and English, ensuring students develop a thorough understanding of each subject rather than relying on rote learning. My teaching methodology begins with strengthening fundamental concepts, followed by chapter-wise practice, NCERT-based learning, important board questions, competency-based questions, case study questions, and previous years' board papers. Regular assignments, periodic tests, and detailed performance analysis help students identify weak areas and improve consistently. I provide personalized attention to every student by adapting my teaching style to their learning pace. My classes include interactive discussions, doubt-clearing sessions, revision plans, and exam-oriented strategies that build confidence and improve time management. My objective is to help students not only score high marks in the Class 10 Board Examination but also develop strong analytical and problem-solving skills that prepare them for higher secondary education. Through consistent guidance, disciplined practice, and individual mentoring, I strive to make learning enjoyable, effective, and result-oriented.

Magalakshmi Poobalan

We are very happy with the way Dr. Nandhini teaches. The concepts are explained clearly and patiently, making even difficult topics easy to understand. The teacher is friendly, approachable, and encourages students to ask questions. There is a good focus on both understanding the concepts and preparing well for exams. Overall, we are very satisfied with the teaching and guidance provided.

Skills: English , Mathematics and more
Also teaches: Class 9 Tuition, Class 12 Tuition and more

Ravi S. Class 10 Tuition trainer in Delhi
(79)
superTutorSuper Tutor
locationImg New Friends Colony, Delhi
experience 10 yrs of Exp students 41 students
greenClock 4712 hrs of classes completed
rsIcon 500 per hour
IB & IGCSE Maths Tutor | Application, Problem Solving & Exam Preparation | 10+ Years
Online Classes Online Classes

Hi, I'm Ravi Shankar, a Mathematics educator with 10+ years of teaching experience. I help Class 10 students strengthen their concepts, improve application skills, and prepare systematically for important examinations. At this stage, simply knowing formulas isn't enough. Students need to recognise the appropriate method, interpret questions correctly, solve efficiently and avoid losing marks through preventable mistakes. My classes focus on: • Concept mastery • Algebra and functions • Geometry • Trigonometry • Statistics and probability • Application-based problems • Multi-step questions • Past-paper practice • Error analysis • Time management and exam strategy I use regular assessments to identify recurring mistakes and areas requiring additional attention. My approach: Concept → Application → Problem Solving → Exam Practice → Analysis The goal is to help students approach examinations with greater confidence, accuracy, and consistency. Book an introductory session to understand where your child currently stands and what needs to improve.

Khushboo Priya

I highly appreciate Sir’s dedication and clarity in teaching. His systematic approach helped me score confidently in board examinations.

Skills: Mathematics
Also teaches: Class 6 Tuition, Class 12 Tuition and more

(63)
superTutorSuper Tutor
locationImg Sector 5, Dwarka, Delhi
experience 10 yrs of Exp students 16 students
greenClock 1955 hrs of classes completed
rsIcon 600 per hour
10 Yrs in Teaching, Conduct Batch Of Two Kids, One-to-One classes. ShortTermPrep & LongTermClasses.
Online Classes Online Classes

I teach Math and Science to 8th-12th standard students and have been teaching for more than 10 years. Batch of 2 Students: I conduct these small batches with a pair of students of the same class and same education board (I cover all popular boards CBSE, ICSE, IGCSE etc.). This works for those students/parents who are looking for individual attention for their kids but still want it to be a little affordable. *3 classes per week (So 12 a month) *Maths and Science (Also English Grammar and Literature) *Fee Rs. 4500/- per month/12 classes. Batch of 6 Students: I conduct these small batches with 5-6 students of the same class and same education board (I cover all popular boards CBSE, ICSE, IGCSE etc.). *4 classes per week (So 16 a month) *Maths and Science *Fee Rs. 4000/- per month/16 classes. I will start the classes immediately once the first kid enrolls. -------------------------------------------------------------------------------Individual/Private/One-to-One classes: I conduct these one to one classes for those students willing to have a one-to-one setup (I cover all popular boards CBSE, ICSE, IGCSE etc.). *3 classes per week (So 12 a month) *Maths and Science (Also English Grammar and Literature) *Fee Rs. 7000/- per month/12 classes. I will start the classes immediately once the first kid enrolls. -------------------------------------------------------------------------------I took classes and batches in different institutions.

Puruzeet Singh

The experience with virendra sir was amazing. He did away with all my doubts and difficulties at all times , he is more than a teacher and a mentor to me. I'll always remember sir's debate's , scolding and care for me. Ty sir for making me a greater individual.

Skills: English , Mathematics and more
Also teaches: Java Training, Class 11 Tuition and more

Other Subjects in CBSE - Class 10

Worksheet Icon

Download free CBSE - Class 10 Science Chemical Reactions and Equations EXERCISES worksheets

Download Now

Find Best Class 10 Tuition ?

Find Now »