Advertisements
Advertisements
Question
In a reaction, 5.3 g of sodium carbonate reacted with 6 g of acetic acid. The products were 2.2 g of carbon dioxide, 0.9 g water and 8.2 g of sodium acetate. Show that these observations are in agreement with the law of conservation of mass.
Sodium carbonate + acetic acid → sodium acetate + carbon dioxide + water
Advertisements
Solution
Mass of reactants = mass of sodium carbonate + mass of ethanoic acid
= 5.3g + 6.0g
= 11.3g ...(i)
Mass of products = mass of sodium ethanoic + mass of carbon dioxide + mass of water
= 8.2g + 2.2g + 0.9g
= 11.3g ...(ii)
It is seen from equations (i) and (ii) that,
Mass of reactants = Mass of products
This test is in accordance with the law of conservation of mass.
APPEARS IN
RELATED QUESTIONS
What do you observe when, barium chloride solution is mixed with sodium sulphate solution ?
Give reason for the following.
Electricity is not considered matter.
Name the scientist who gave law of conservation of mass.
Name the law of chemical combination which was given by Lavoisier.
Potassium chlorate decomposes, on heating, to form potassium chloride and oxygen. When 24.5 g of potassium chlorate is decomposed completely, then 14.9 g of potassium chloride is formed. Calculate the mass of oxygen formed. Which law of chemical combination have you used in solving this problem ?
An ionic compound will be formed by the combination of one of the following pairs of elements. This pair of elements is :
State the main points of Landolt’s experiment for experimental evidence of the law.
Select the correct answer from A, B, C, D & E for the statement given below:
The process of change of a liquid into vapour, [gas] on heating.
Match the following.
| Law of conservation of mass | Sir William Crookes |
| Law of constant proportion | James Chadwick |
| Cathode rays | Joseph Proust |
| Anode rays | Lavoisier |
| Neutrons | Goldstein |
Why does a light paddle wheel placed in the path of cathode rays begin to rotate, when cathode rays fall on it?
