Lab+4+Testing+Hypothesis

-pipettor -scale -5mL pipette - graduated cylinder
 * Materials**:

1. Zero/(Tare) small plastic container on scale. Scale should read 0.0g. If grams aren't being used, hit the button on the right once to get grams 2. Add 5 mL of water in plastic container on scale. Without taring or zeroing the scale, continue to add 5 mL of water and record the weight. Continue this three more times (5 times total). If precision with pipettor is good, should be getting exact multiplies of the first aliquot put into the plastic container.
 * Methods:**

Wiki Questions: 1. What does aliquot mean?
 * Attempt 1 || 4.8 ||
 * Attempt 2 || 9.7 ||
 * Attempt 3 || 14.5 ||
 * Attempt 4 || 19.3 ||
 * Attempt 5 || 24.1 ||
 * Latin word meaning some or severl, commonly used in chemistry to measure a portion of a total amount of a solution**

2. What is the definition of a meniscus? Defintion of meniscus
 * The curve in the upper surface of a standing body of liquid, produced due to the fact of the surface or container of another object.**

3. How accurate is the scale?
 * My scale is pretty accurate. When I put 5mL of water into the plastic container it has a mass of 4.8g, this is very close because it should weigh exactly 5g,**
 * My possibility of error could have occured by only measure 4.8 or 4.9mL of water, but all and all I am very close to 5mL so this is acceptable.**

4. How precise where your aliquots?
 * My aliquots were pretty accurate as well. My numbers went up by 4.8-4.9 mL each attempt**
 * Test the graduated cylinder for accuracy by weighing out 100mL of water and pouring it into the graduated cylinder. Repeat and do this 2 more times for a total of 5.**

5. Does it read 300mL? Read the meniscus the same way. It is more difficult with plastic.
 * No it does not, it reads about 305mL**

6. How much water was left in your cup or container?
 * None**

Dry the container. Weigh out 100mL of water. Dump the water and without turning off the scale (which would zero it again) reweigh the "empty" container. Subtract the dry weight an the "wet" weight of the container. 7. Does this account for any "missing" water?


 * Dry: 228.3**
 * Wet:229.3**
 * Yes, would only account for 1 total gram of missing water**

8. How accurate is the graduated cylinder?
 * Cylinder seems to be pretty accurate due to the fact that only about a gram of water was unaccounted for**

With any paper towel commercial that I see, every company that advertises their product claims to have the most absorbent towel on the market
 * My Experiment**
 * Observations:**

"The quilted quicker picker upper..... bounty." (Bounty's company slogan)

Previous Experiment Completed
 * History:** Yes this experiment has been done before. Below is a link provided for experiment that has been completed before.

I am going to be testing how absorbent paper towels are between three different brands. Brand A (Heart Design), Brand B (Octagon Design), and Brand C (Brick Design). I think that the Brand A will be more absorbant then Brand B and C because I feel the heart design will allow the paper towel to hold more water. For my experiment I added 50mL of water into a small plastic container. Then I put one 8 by 11" piece of paper towel into the beaker and wait 20 seconds. After time has expired I removed the paper towel and calculated the amount of water that was left in the plastic container. I then repeated the expirement using the two other brands of paper towels. I tested each brand of paper towel twice.
 * Hypothesis:**
 * Methods:**

Only part of the experiment that I changed were the three different brands of paper towels used.
 * Variables:**

Everything throughout my experiment will be controlled except for the three different brands of paper towels. This means I will be using 50mL of water and the same size of paper towel (8 by 11") every trial.
 * Controls:**

(in 50mL container) || Trial 1 || Trial 2 || Brand A (Picked up least amount of Water) Brand C (Picked up most amount of water)
 * Results:**
 * Amount of Water Remaining
 * Brand A || 24mL || 23mL ||
 * Brand B || 22mL || 21mL ||
 * Brand C || 19mL || 18mL ||


 * Discussion:**

This experiment showed that Brand C absorbed more water than of Brand A and B. Although it wasn't by much, clearly Brand C was more absorbent. Brand C absorbed about 30.5 ml each time, while Brand A's was 26.5mL and Brand B's 28.5mL.