Advertisements
Advertisements
प्रश्न
What do you observe when, barium chloride solution is mixed with sodium sulphate solution ?
Advertisements
उत्तर
\[\ce{\underset{\text{(aq.)}}{BaCl2} +\underset{\text{(aq.)}}{Na2So4}->\underset{\text{(ppt.)}}{BaSO4}+\underset{\text{(aq.)}}{2NaCl}}\]
We will observe that a white insoluble solid (precipitate) of barium sulphate is formed along with a solution of sodium chloride. Wait for ten minutes to complete the reaction and the solid formed to settle down.
Weigh the content again and note the reading.
We will observe that,
total mass of the apparatus + reactants = total mass of apparatus + products
Hence the law of conservation of mass is verified.
APPEARS IN
संबंधित प्रश्न
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
Which postulate of Dalton’s atomic theory is the result of the law of conservation of mass?
When magnesium is burnt in air, there is an increase in mass after the reaction.
Fill in the blank:
Matter is anything that has............. and occupies .............
State the law of conservation of mass.
Name the law of chemical combination which was given by Proust.
‘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 ?
Which postulate of Dalton's atomic theory can explain the law of conservation of mass ?
The law of conservation of mass was given by :
Copper sulphate reacts with sodium hydroxide to form a blue precipitate of copper hydroxide and sodium
sulphate. In an experiment, 15.95 g of copper sulphate reacted with 8.0 g of sodium hydroxide to form
9.75 g of copper hydroxide and 14.2 g of sodium sulphate. Which law of chemical combination is illustrated by this data ? Give reason for your choice.
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’.
Select the correct answer from A, B, C, D & E for the statement given below:
In Landolt’s experiment – the form in which the chemical energy stored up in the reactants __________ is released.
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?
The chemical symbol for nitrogen gas is ______.
Name the four laws of chemical combinations.
