Answer:
95.50%.
Step-by-step explanation:
The table salt (NaCl) in the mixture can be determined by using the mass of carbon dioxide produced from burning the mixture. When table salt is burned, it releases NaCl (s) and forms NaCl (aq). The NaCl (aq) reacts with water to form HCl (aq) and NaOH (aq). The reaction with NaCl (aq) and water is shown below:
NaCl (aq) + H2O (l) → NaOH (aq) + HCl (aq)
When the 6.00 g sample of the mixture was burned, 3.20 g of carbon dioxide was produced. The carbon dioxide was produced by the combustion of the sugar in the mixture. The formula for sugar is C12H22O11, and when it is burned, it forms carbon dioxide and water. The reaction is shown below:
C12H22O11 (s) + 12O2 (g) → 12CO2 (g) + 11H2O (l)
From the mass of carbon dioxide produced, the mass of sugar in the original 6.00 g sample can be calculated. The mass of sugar in the sample is equal to the mass of carbon dioxide produced divided by 12 (the number of moles of carbon dioxide produced from the combustion of one mole of sugar). The mass of sugar in the sample is 3.20 g / 12 = 0.267 g.
Since the mass of the sugar in the sample is known, the mass of the table salt in the sample can be determined. The mass of table salt in the sample is equal to the total mass of the sample minus the mass of the sugar. The mass of table salt in the sample is 6.00 g - 0.267 g = 5.73 g.
Finally, the mass percentage of the table salt in the mixture can be calculated. The mass percentage of table salt in the mixture is equal to the mass of the table salt divided by the total mass of the sample and multiplied by 100%. The mass percentage of the table salt in the mixture is 5.73 g / 6.00 g x 100% = 95.50%.
Therefore, the mass percentage of table salt in the mixture is 95.50%.