What is the percent by mass of chlorine in Ca(ClO₃)₂?

Question

Quizplus · Accepted Answer

The formula given is for calcium hypochlorite, which can be simplified to Ca(ClO2)2. To find the percent by mass of chlorine in this compound, we first calculate the molar mass of the compound and then find the proportion of that mass that comes from chlorine.- Molar mass of Ca(ClO2)2 = 40.08 (Ca) + 2 * [35.45 (Cl) + 2 * 16.00 (O)] = 40.08 + 2 * (35.45 + 32.00) = 40.08 + 2 * 67.45 = 174.98 g/mol- Mass of chlorine in the formula = 2 * 35.45 = 70.9 gPercent by mass of chlorine = (70.9 / 174.98) * 100 ≈ 40.5%However, since this result does not match any of the options and assuming a mistake in my calculation or interpretation of the chemical formula (which should be Ca(OCl)2 for calcium hypochlorite, leading to a different calculation), let's correct the approach based on the options provided:For Ca(ClO2)2:- Correct molar mass calculation: Ca = 40.08, Cl = 35.45 * 2, O = 16.00 * 4. Total = 40.08 + 70.9 + 64 = 175.98 g/mol approximately.- Correct percent by mass of Cl = (70.9 / 175.98) * 100 ≈ 40.3%.Given the discrepancy and assuming a mistake in the formula interpretation, the correct choice should align with the standard options provided, suggesting a reevaluation of the calculation based on the options given. The correct calculation for calcium hypochlorite (Ca(OCl)2) should consider the actual mass of chlorine in the compound and its proportion relative to the total mass:- Molar mass of Ca(OCl)2 = 40.08 (Ca) + 2 * [35.45 (Cl) + 16.00 (O)] = 40.08 + 2 * 51.45 = 143.08 g/mol- Mass of chlorine = 2 * 35.45 = 70.9 gPercent by mass of chlorine = (70.9 / 143.08) * 100 ≈ 49.6%, which still does not align with the provided options, indicating a fundamental error in the calculation or interpretation steps above.Given the options and the typical approach to calculating percent by mass, the correct answer should reflect the standard calculation method for percent composition by mass in a chemical compound. Without the exact formula or a clear path to one of the provided options, the response requires reevaluation based on the standard formula for calcium hypochlorite or the correct interpretation of the given formula. The initial approach and correction attempt highlight the importance of accurately determining the formula and molar mass of the compound in question.

What Is the Percent by Mass of Chlorine in Ca(ClO3)2

What Is the Percent by Mass of Chlorine in Ca(ClO₃)₂