Chapter 3, Problem 2STP

Interpretation Introduction

Interpretation:

Best statement that describes the relationship between two samples is to be determined.

Concept introduction:

The mass percentage is defined as the percentage of component present in it. The mass percentage of the element is the mass of element divided by the total mass of the compound and multiplied by 100.

$\text{Mass percentage=}\frac{\text{mass}\text{of}\text{element}}{\text{mass}\text{of}\text{total}\text{compound}}\text{×100}$

Answer to Problem 2STP

Correct answer: The correct option is (d).

Explanation of Solution

Reason for correct option:

According to the law of multiple proportions, the compositions of $\text{2}$ compounds composed of the same elements.

The mass of Cl and F are in different ratio and mass of Cl combine with the F with a fixed amount and follow the law of multiple proportion.

The compound in sample I is not the same as in sample II. Therefore, the mass ratio of Cl (Chlorine) to F in both samples will obey the law of multiple proportions.

Hence, this is a correct option.

Conclusion

Reasons for incorrect options:

Option (a) The compound in sample I is the same as in sample II. Therefore, the mass ratio of Cl to F in both the samples will obey the law of definite proportions, but the mass ratio is not same for both samples. So, this option is incorrect.

Option (b) The compound in sample I is the same as in sample II. Therefore, the mass ratio of Cl to F in both samples will obey the law of multiple proportions. The one element not fix with other element ratio in constant amount, so not obey this law.

Option (c) The compound in sample I is not the same as in sample II. Therefore, the mass ratio of Cl to F in both sampleswill obey the law of definite proportions, with different mass ratio not obey the law of definite proportions.