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One of the forms of a naturally occurring solid compound P is usually used for making the floors of houses. On adding a few drops of dilute hydrochloric acid to P, brisk effervescence is produced. When 50 g of reactant P was heated strongly, then 22 g of a gas Q and 28 g of a solid R were produced brisk effervescence on adding dilute HCl to P. Gas Q is said to cause global warming whereas solid R is used for whitewashing. (a) What is (i) solid P (ii) gas Q, and (iii) solid R? (b) What is the total mass of Q and R obtained from 50 g of P? (c) How does the total mass of Q and R form compare with the mass of P taken? (d) What conclusion do you get from the comparison of masses of products and reactant? (e) Which law of chemical combination is illustrated by the example given in this problem? |
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Answer» One of the forms of a naturally occurring solid compound P is usually used for making the floors of houses. On adding a few drops of dilute hydrochloric acid to P, brisk effervescence is produced. When 50 g of reactant P was heated strongly, then 22 g of a gas Q and 28 g of a solid R were produced brisk effervescence on adding dilute HCl to P. Gas Q is said to cause global warming whereas solid R is used for whitewashing. (a) What is (i) solid P (ii) gas Q, and (iii) solid R? |
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