Topic Content:
- Law of Constant Composition
- Verification of the Law
- Analysis of Three Samples of Copper (II) Oxide (CuO)
The Law of Constant Composition was suggested by Joseph Louis Proust, a French chemist in (1799).
The law states that all pure samples of the same chemical compound contain the same elements combined in the same proportion by mass.
Verification of the Law:
This can be experimented with by preparing Copper (II) oxide in three different ways.
(a) Action of heat on Copper (II) trioxonitrate (V)
\( \scriptsize 2Cu(NO_3)_{2(s)} \: \rightarrow \: \underset {black}{2CuO_{(s)}} \: + \: 4NO_{2(g)} \: + \: O_{2(g)} \)
(b) Action of heat on Copper (II) trioxocarbonate (IV)
\( \scriptsize Cu(CO_3)_{(s)} \: \rightarrow \: CuO_{(s)} \: + \: CO_{2(g)} \)
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It was very easy for me to understand. Thanks to the Kofastudy team.