a 2.4375 g sample containing a mixture of KClO3 + NaCl is heated and undergoes a mass loss of 0.6191g. What percent of KClO3 is in the mixture?
To find the percent of KClO3 in the mixture, we need to determine the mass of KClO3 that was in the 2.4375 g sample.
Let's start by calculating the mass of NaCl that was in the sample. Since the mass loss during heating was 0.6191 g, this must be the mass of NaCl that evaporated.
Therefore, the mass of NaCl in the original sample is 2.4375 g - 0.6191 g = 1.8184 g.
Now, to find the mass of KClO3, we subtract the mass of NaCl from the original sample:
Mass of KClO3 = 2.4375 g - 1.8184 g = 0.6191 g
Finally, to calculate the percent of KClO3 in the mixture, we use the formula:
Percent KClO3 = (Mass of KClO3 / Total mass of mixture) x 100
Percent KClO3 = (0.6191 g / 2.4375 g) x 100
Percent KClO3 = 25.38%
Therefore, the mixture contains 25.38% KClO3.