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
Hydrogen and oxygen combine in the ratio of 1:8 by mass to form water. What mass of oxygen gas would be required to react completely with 3 g of hydrogen gas?
Which postulate of Dalton’s atomic theory is the result of the law of conservation of mass?
What do you observe when, barium chloride solution is mixed with sodium sulphate solution ?
What is mass ?
If an object weighs 6 kg on earth. What will be its weight on moon ?
‘If 100 grams of calcium carbonate (whether in the form of marble or chalk) are decomposed completely, then 56 grams of calcium oxide and 44 grams of carbon dioxide are obtained’. Which law of chemical combination is illustrated by this statement ?
An ionic compound will be formed by the combination of one of the following pairs of elements. This pair of elements is :
State the ‘law of conservation of mass’.
Complete the statement by filling the blank with the correct word given below.
The law of conservation of mass is strictly valid if mass and _________ are considered together.
The chemical symbol for nitrogen gas is ______.
