Name: The Mole Concept
Uploaded: 2019-07-19
Duration: 4 min 28 s
Description: The mole is the SI unit of measurement for the amount of substance. 1 mole of a substance means the Avogadro's number of atoms or molecules of that substance...

Question

In a reaction,

5.3 g

of sodium carbonate is reacted with

6 g

of ethanoic acid. The products were

2.2 g

of carbon dioxide,

0.9 g

water and

8.2 g

of sodium ethanoate. Show that these observations are in agreement with the law of conservation of mass.

Sodium carbonate + ethanoic acid \to sodium ethanoate + carbon dioxide + water

Accepted Answer

The given reaction is,
$Sodium carbonate + ethanoic acid \to sodium ethanoate + carbon dioxide + water$
Reactants: Mass of Sodium carbonate $(N a_{2} C O_{3}) = 5.3 g$
Mass of Ethanoic acid $({CH}_{3} COOH) = 6 g$ .
Products: Mass of Sodium ethanoate $(C H_{3} C O O N a) = 8.2 g,$
Mass of Carbon dioxide $(C O_{2}) = 2.2 g$ ,
Mass of Water $(H_{2} O) = 0.9 g$ . Therefore,
Total mass of the given reactants $= 5.3 g + 6 g = 11.3 g$
Total mass of the given products $= 2 .2 g + 0 .9 g + 8 .2 g = 11 .3 g$
Law of conservation of mass states that mass can neither be created nor be destroyed in a chemical reaction.
Thus, total mass of reactants $=$ Total mass of products
Thus, the observations are in agreement with the law of conservation of mass.

NCERT Solutions for Chapter: Atoms and Molecules, Exercise 1: Questions

NCERT Science Solutions for Exercise - NCERT Solutions for Chapter: Atoms and Molecules, Exercise 1: Questions

Questions from NCERT Solutions for Chapter: Atoms and Molecules, Exercise 1: Questions with Hints & Solutions

Learn and Prepare for any exam you want !