Percent Error

Today was a pretty relaxed day in 7th period chemistry. We started out class by turning in our Penny Density Lab. After that, Mr. Lieberman went over question 6 in the post lab, which was finding the percent error in our experiment. The equation to find the percent error is:

You are probably going to need to know this equation so memorize it! Also, Mr. Lieberman stressed the point that even if our data is wrong, as long as our data supports our answer, it is okay. After going over the Penny Lab, we started on Part A of the Beverage Density Lab. In this lab, we were looking for the percent sugar content in several different beverages. We started off this lab by going

over Pre-Lab question 3 on how to calculate the sugar content. To find the

sugar content percent, you first have to multiply the given volume (355 mL) by

the given density (1.043 g/mL) which comes out to be 370 g. Next, you divide

the sugar mass (49 g) by the total mass (370 g) to get the percent sugar content in the beverage. After explaining the Pre-Lab,Mr. Lieberman took us through

the procedure of our Lab and then we got started. Also, in the lab, we changed the volume of 10.00 mL to 5.00 mL when measuring the substances. That

basically sums up what we did today in class, and now here is an awesome

density song.

The homework for tonight is to create a graph for our lab tomorrow and our

test is on Thursday.

The next Scribe is... Joe R.