A 2.4375 g sample containing a mixture of KClO3 and NaCl is heated and under goes a mass loss of 0.6191 g. What is the percent of KClO3?
To determine the percent of KClO3 in the mixture, we need to calculate the mass of KClO3 in the sample.
First, let's find the mass of the remaining components after the mass loss. The mass loss of 0.6191 g corresponds to the decomposition of KClO3. So, the remaining mass of the mixture is (2.4375 g - 0.6191 g) = 1.8184 g.
Now, we need to find the mass of NaCl in the remaining mixture. To do this, we subtract the mass of remaining components from the initial mass of the mixture.
Mass of NaCl = Mass of the remaining mixture - Mass of KClO3
Mass of NaCl = 1.8184 g - 0 g (because all the KClO3 decomposed)
So, the mass of NaCl in the remaining mixture is 1.8184 g.
Finally, we can calculate the percentage of KClO3 in the original mixture. The percent mass of KClO3 is given by:
Percent KClO3 = (Mass of KClO3 / Initial mass of the mixture) x 100
Percent KClO3 = (0.6191 g / 2.4375 g) x 100
Percent KClO3 ≈ 25.40%
Therefore, the percent of KClO3 in the mixture is approximately 25.40%.