PRESENTATION OUTLINE
In this experiment we chose a piece of gum to find the amount of sugar it contained in grams. We massed the gum in the wrapper after increments of 25 chews. We repeated this process until the mass of the gum and wrapper was the same multiple times in a row.
Question 1: state the mass of sugar In your gum.
2.82 -1.23 = 1.59g
Question 2: calculate the % comp by mass of sugar in the gum.
1.59/2.82x100= 56%
Question 3: if your gum is actually 71.5% sugar, what is your percent error?
56%/71.5% x100 = 78.3%
Question 4: How many chews did it take for all the sugar to be removed and how can you be pretty sure this is true? Answer: 400 chews and the gum started to lose flavor.
5. What is the percent composition by mass of calcium in the compound calcium hydroxide? Answer: 68.97%
6. What is the percent composition by mass composition of carbon in C7H14? Answer: 85.7%
7. What is the % composition by mass of phosphorus in ammonium phosphate? Answer: 20.8%
8. Write empirical formulas for octane, glucose, and 1-hexane? Answer: C4H9, CH2O, CH2
I had 1.59 grams of sugar in my gum. The % composition of sugar in my gum was 56%. My percent error was 78.3%. The sugar was gone from my gum in 400 chews. I could tell because it lost flavor. The % composition of calcium in calcium hydroxide was 68.97%. The % composition of carbon in C7H14 is 85.7%. The % composition of phosphorus in ammonium phosphate is 20.8%. The empirical formulas were C4H9, CH2O, CH2. I learned that there are many things that we can use chemistry for in the real world.