A 79.1 g mixture of the compounds calcium chloride and sodium sulfide is 80.9 % by mass sodium sulfide. The compound sodium sulfide is 58.9 % by mass sodium. Calculate the mass (g) of sulfur in the mixture.
thanks.
g Na2S + g NaCl = 79.1 g.
mass Na2S = 79.1 x 0.809 = ? g.
Then ?g x 0.589 = mass S.
To calculate the mass of sulfur in the mixture, we need to first determine the amount of sodium sulfide in the mixture, and then find the amount of sulfur in that sodium sulfide.
Step 1: Calculate the mass of sodium sulfide in the mixture.
We are given that the mixture is 80.9% by mass sodium sulfide. This means that for every 100 g of the mixture, 80.9 g is sodium sulfide.
So, the mass of sodium sulfide in the mixture is:
Mass of sodium sulfide = 80.9% * 79.1 g = 0.809 * 79.1 g = 64.02 g
Step 2: Calculate the mass of sodium in the sodium sulfide.
We are given that sodium sulfide is 58.9% by mass sodium. This means that for every 100 g of sodium sulfide, 58.9 g is sodium.
So, the mass of sodium in the sodium sulfide is:
Mass of sodium = 58.9% * 64.02 g = 0.589 * 64.02 g = 37.74 g
Step 3: Calculate the mass of sulfur in the sodium sulfide.
Since the mass of sodium sulfide is given, and we know the mass of sodium in the sodium sulfide, we can find the mass of sulfur by subtracting the mass of sodium from the mass of sodium sulfide.
Mass of sulfur = Mass of sodium sulfide - Mass of sodium
Mass of sulfur = 64.02 g - 37.74 g = 26.28 g
Therefore, the mass of sulfur in the mixture is 26.28 g.