Two samples of.lead)IV) oxide were prepared thus:
By heating in the presence of oxygen.
By heating lead trioxocarbonate(IV). Analysis of the sample shows that 11.00g of lead(IV) oxide contains 3.00g of lead.
Analysis of the sample also shows that 4.40g of blead(IV)oxide Contain 1.20g. Show that the result illustrates the law of constant composition
The law of constant composition states that a given compound always contains the same elements in the same proportions by mass.
In this case, we have two samples of lead(IV) oxide that were prepared by different methods. The first sample contains 11.00g of lead(IV) oxide and 3.00g of lead. The second sample contains 4.40g of lead(IV) oxide and 1.20g of lead.
To determine if the result illustrates the law of constant composition, we need to compare the ratio of lead to lead(IV) oxide in both samples.
For the first sample:
Mass of lead = 3.00g
Mass of lead(IV) oxide = 11.00g
Ratio of lead to lead(IV) oxide = 3.00g / 11.00g = 0.273
For the second sample:
Mass of lead = 1.20g
Mass of lead(IV) oxide = 4.40g
Ratio of lead to lead(IV) oxide = 1.20g / 4.40g = 0.273
Both samples have the same ratio of 0.273, which means that the ratio of lead to lead(IV) oxide is constant regardless of the method of preparation. This result illustrates the law of constant composition.