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Dalton's Law Formula

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Last updated date: 13th Jun 2024
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Dalton's Law Formulas - Dalton's Law of Partial Pressure

This is an empirical law that states that the total pressure exerted by a mixture of non-reacting gasses is equal to the sum of partial pressures of individual gasses.

 

Note: It is important to have non-reacting gasses as the pressure is dependent upon the number of moles of gas taken in the mixture. If the gasses react, the number of moles may change and the total pressure will not be equal to the sum of the partial pressure of gasses we took initially. 

 

Mathematically,

 

Ptotal = P1 + P2 + P3 + ….. + Pn

 

WherePtotal' is the total pressure of the mixture, and ‘P1, P2, P3 … Pn are the partial pressures exerted by individual gasses.

 

Example: A container contains three gasses, N2, O2 and Ar, with partial pressures of 23.3 kPa, 40.9 kPa and 13.7 kPa respectively. What is the total pressure inside the container?

 

Solution: 

PN2 = 23.3 kPa; PO2 = 40.9 kPa; PAr = 13.7 kPa

 

PT = ? 

 

PT = PN2 + PO2 + PAr 

 

PT = 23.3 kPa + 40.9 kPa + 13.7 kPa = 77.9 kPa

 

Question: In the chem lab, a student filled a balloon with 2 different gasses, CO2 and N2. The atmospheric pressure in the chem lab was 770.0 mmHg and the partial pressure of CO2 added to the balloon was 0.3255 atm. What was the partial pressure of N2 in the balloon?

 

Options:

(a) 522.6 mmHg

(b) 540.6 mmHg

(c) 640.6 mmHg

(d) 840.7 mmHg

Answer: (d)

 

Solution: 

PT = 770.0 mmHg; 

 

PCO2 = 0.3255 atm ( 760 mmHg /1 atm ) = 247.4 mmHg; 

 

PN2 =? 

 

PT = PCO2 + PN2 

 

PN2 = PT − PCO2 

 

PN2 = 770.0 mmHg - 274.4 mmHg = 522.6 mmHg

 

Learning the Dalton’s Law Formula - Dalton’s Law of Partial Pressure Formulas

Dalton’s Law Formula - Dalton’s Law of Partial Pressure Formulas is an important formula of mathematics that requires an ample amount of time and attention to understand. This formula allows you to determine the partial pressure of gasses inside a container.  You will have to practice different questions to become more proficient in using Dalton’s Law of Partial Pressure Formula. Here are some tips and tricks to understand this topic: 

  • Before you move to Dalton’s Law Formula - Dalton’s Law of Partial Pressure Formulas, read the theoretical part of the concept thoroughly. It will give you a better understanding of Dalton’s law and make the formula easy to learn. 

  • Read the textbook explanation of Dalton’s Law Formula - Dalton’s Law of Partial Pressure Formulas to get an idea of what the law states. 

  • When you are studying Dalton’s Law Formula - Dalton’s Law of Partial Pressure Formulas, make notes of the most important points of the concept. Handwritten notes will make the learning process a lot easier during exam preparations. 

  • Once you have learned Dalton’s Law Formula - Dalton’s Law of Partial Pressure Formulas, go through the solved example provided in your textbooks and reference books to understand how to apply the formula in different types of questions.

  • Try out unsolved exercises, based on Dalton’s law formula, given at the back of the chapter in your textbook to practice the applications of this formula. 

  • Go through the sample papers and previous year's questions papers to get an idea of what type of questions related to Dalton’s Law Formula - Dalton’s Law of Partial Pressure Formulas can come in your final exams.     

FAQs on Dalton's Law Formula

1. What is the best place to learn Dalton’s Law Formula - Dalton’s Law of Partial Pressure Formulas?

Vedantu is the best place to learn Dalton’s Law Formula - Dalton’s Law of Partial Pressure Formulas. It is India’s leading educational platform that provides you with an unlimited number of study materials. You can start learning Dalton’s Law Formula - Dalton’s Law of Partial Pressure Formulas and other concepts of different subjects directly from our website or download our mobile application from the play store or app store. Apart from this, we provide study resources for all the subjects, including chemistry, physics, and math. You can use these resources to learn formulas of trigonometry, matrices, mensuration, etc. 

2. Is it necessary to study Dalton’s Law Formula - Dalton’s Law of Partial Pressure Formulas?

Yes, it is necessary to study Dalton’s Law Formula - Dalton’s Law of Partial Pressure Formulas. Dalton’s law allows you to determine the pressure and partial pressure of gasses inside a container. By learning the formula, you can explore the application of Dalton’s law and improve your understanding of partial pressure. This concept makes up a significant portion of marking distributions, which is why you must have a strong grasp of this law. Once you have completely understood Dalton’s Law Formula - Dalton’s Law of Partial Pressure Formulas, you will be able to score well in your exams.   

3. What are the limitations of Dalton’s Law of Partial Pressure?

There are certain limitations of Dalton’s law of partial pressure. For one, Dalton’s law of partial pressure is only applicable when the component gasses in the container do not react with each other. The law is not applicable to those gasses that can be combined chemically. With these limitations, it gets difficult to apply Dalton’s law of partial pressure to certain mixtures of gasses, such as hydrogen and chlorine, carbon monoxide and chlorine, etc.  

4. How will Dalton’s Law Formula - Dalton’s Law of Partial Pressure Formulas help me?

Dalton’s Law Formula - Dalton’s Law of Partial Pressure Formulas will help you understand the applications of Dalton’s law. This law is an important concept of chemistry that helps you learn and understand the concept of partial pressure. Learning Dalton’s Law Formula - Dalton’s Law of Partial Pressure Formulas will help you score excellent marks in your exam. Once you have understood Dalton’s Law Formula - Dalton’s Law of Partial Pressure Formulas, you will be able to apply the formula in different types of questions. By using solved examples and solving practical questions, you will get an even better understanding of Dalton’s law of partial pressure. 

5. How can I learn Dalton’s Law Formula - Dalton’s Law of Partial Pressure Formulas?

You have to give a lot of your time and attention to understand Dalton’s Law Formula - Dalton’s Law of Partial Pressure Formulas. To start learning, you should first go through the textbook explanation of the law and get an idea of what the law says and why it is important. You can refer to Vedantu to learn Dalton’s Law Formula - Dalton’s Law of Partial Pressure Formulas with ease. Once you are done with the theoretical part, you can try solving questions based on this formula and learn how to apply it in different situations.