Advertisements
Advertisements
Question
What do you observe when, barium chloride solution is mixed with sodium sulphate solution ?
Advertisements
Solution
\[\ce{\underset{\text{(aq.)}}{BaCl2} +\underset{\text{(aq.)}}{Na2So4}->\underset{\text{(ppt.)}}{BaSO4}+\underset{\text{(aq.)}}{2NaCl}}\]
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
RELATED QUESTIONS
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
State the law of conversation of mass.
When magnesium is burnt in air, there is an increase in mass after the reaction.
If an object is taken to the moon from the earth what will be its mass ?
Give reason for the following.
Electricity is not considered matter.
Fill in the blank:
Matter is anything that has............. and occupies .............
State the law of conservation of mass.
Name the scientist who gave law of conservation of mass.
Name the law of chemical combination which was given by Lavoisier.
Name the law of chemical combination which was given by Proust.
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 :
Complete the statement given below by filling in the blanks with the correct words.
Atoms contain ________ with positively charged ________.
State the main points of Landolt’s experiment for experimental evidence of the law.
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 |
The chemical symbol for nitrogen gas is ______.
Name the four laws of chemical combinations.
