Question

5.0g samples of the carbonates of barium, copper, lithium and magnesium are decomposed to the metal oxides and carbon dioxide.
For which compound is there the greatest loss in mass? A barium carbonate
B copper(II) carbonate C lithium carbonate
D magnesium carbonate

Answer 1

Answer:

the answer is copper....

Answer 2

The loss of mass on decomposition of equal mass of the following metal carbonates to their coressponding metal oxides is greates for lithium carbonate.

• Molar masses of lithium carbonate is the lowest among the following metal carbonates. So, 5 g of lithium carbonate will contain the greatest number of moles of the metal carbonate.
• Since one mole of the metal carbonate produces one mole of carbon dioxide on decomposition, more the number of moles of the carbonate will signify more carbon dioxide produced.
• Hence, lithium carbonate has the greatest loss in its mass on decomposition in the form of carbon dioxide.