Question

in a reaction 15.9g of copper sulphate completely reacts with 7.8g of sodium sulphide, it is observed that 9.5g of copper sulphide is formed. What is the mass of sodium sulphate solution formed? Name the law applied

Answer 1

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⭐Law applied:-

⚡⚡LAW OF CONSERVATION OF MASS⚡⚡

I.e total mass of reactant= total mass of products

Now,

° Mass of copper sulphate+ mass of sodium sulphide= mass of copper sulphide + sodium sulphate.

° (15.9+7.8)-9.5

= 14.2g

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Answer 2

Answer:

14.2 grams

Explanation:

According to law of conservation of mass

total mass of reactants = total mass of product

copper sulphate + sodium sulphide = copper sulpide + sodium sulphate

          15.9           +             7.8            =            9.5          + sodium sulphate

                          23.7                           =            9.5          + sodium sulphate

                  sodium sulphate              =           23.7  -  9.5

                  sodium sulphate              =          14.2 grams

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