Example 1: Mass Percentage
Calculate the mass percentage of benzene (C6H6) and carbon tetrachloride (CCl4) if 22 g of benzene is dissolved in 122 g of carbon tetrachloride.
Step 1: Identify what we know
- Mass of benzene (C6H6) = 22 g
- Mass of carbon tetrachloride (CCl4) = 122 g
Step 2: Calculate the total mass of the solution
Total mass = Mass of benzene + Mass of carbon tetrachloride
Total mass = 22 g + 122 g = 144 g
Step 3: Calculate mass percentage of benzene
Mass percentage = (Mass of component / Total mass of solution) × 100
Mass percentage of benzene = (22 g / 144 g) × 100 = 15.28%
Step 4: Calculate mass percentage of carbon tetrachloride
Mass percentage of CCl4 = (122 g / 144 g) × 100 = 84.72%
Alternatively, we can calculate this as: 100% - 15.28% = 84.72%
Answer:
Mass percentage of benzene = 15.28%
Mass percentage of carbon tetrachloride = 84.72%
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