The graduated cylinder was used to pour the 90 mL of tap water into the 150 mL beaker with G2 powder. The mixture was stirred with a stirring rod until it had completely dissolved.
7. A paper towel a stirring rod was then used to clean and dry the graduate cylinder of any remaining water.
8. The G2 mixture was poured into the graduate cylinder and was weighed. An analytical balance was used for this process. The mass of the graduated cylinder (Step 4) was subtracted from the graduated cylinder containing the G2 solution. This identified the G2 solution’s mass.
9. The density of the G2 solution was determined by dividing the mass of the G2 by the volume of the G2 solution. The density was then recorded.
10. The G2 was disposed of in a laboratory sink.
11. Steps 1-10 were completed two additional times.
The density of Purple G2 was discorded to be 1.1.19 g/mL. The results contrasted with the expected density of 1.03 g/mL. The standard deviation revealed that the uncertainty of G2 experiment was 1.19g/mL±0.03.
On possible reason for error conducted in the experience could have been a loss of liquid during transfer of the G2 solution. The G2 solution was construct in a beaker because it needed to dissolve entirely, and in order to do so it could not done so in a graduated cylinder. The transferred G2 powder to the beaker, the transferred water in the graduated cylinder to the beaker, or the transferred G2 mixture to the graduated cylinder could have caused error…
The aim of this practical is to measure the effect of volume, density and temperature. It is also help to be familiar with variety of common laboratory technique.
Container with lids
20 and 10 ml Volumetric pipette
Natural Rubber Pipette Filler
There are two pipette, choose one which you using in whole practical.
Label and weight accurately, to 4 decimal places.
Leaf Disk float in water alone. When a solution consisting of a small amount of sodium bicarbonate is added to the water it causes the leaf disk to sink. As photosynthesis continues in the leaf disk it releases oxygen and causes the leaf disk to rise. While cellular respiration is occurring also the rate that the disk raise is an in implicit measurement of the net rate of photosynthesis. The independent variable in this lab is the solution and the light because it can be…
Phosphate can be harmful when excessive amount is present in the drinking water system. The U.S. Public Health Service has set the maximum value of phosphate in drinking water at 3.0 mg/L. In this experiment, several samples were diluted and its concentration were analyzed through a spectrophotometer. The results obtained (0.1 mg/L and 2.28mg/L) are within the U.S. Public Health Service’s standards and are deemed to be safe.
It is important that drinking water is monitored regularly…
the cereal tested was 3.41 mg and the average total mg of iron in the tablets was 60.39. The results from this showed that Total Cereal only contains 18.94 % of the iron that it claims to have on the label and the iron tablet contains 92.91 % of the iron that it claims to have. Deviations in this lab could have come from the fact that there were four different experimenters who performed one trial, to give a grand total of four trials for this lab. Since the experimenter was not a constant…
Preparing Dilutions of the Silver Nanoparticles
1. Gather all materials.
2. Put on a pair of disposable gloves.
3. Make a paper towel damp with some 70% isopropyl rubbing alcohol. Wipe down the work surface with the rubbing alcohol-dampened paper towel.
4. Using a permanent marker, label the five baby food jars #1 to #5.
5. Using the 25 milliliter (mL) graduated cylinder, measure and pour 22.5 mL of distilled water (from a new, unopened container) into each of jars #2, #3, #4, and #5.
What is DNA? DNA is a deoxyribonucleic acid, which is a self-replicating material that is present in just about all living organisms as the top chromosomes. DNA Isolation is the development of purification of DNA from a sampling applying a mixture of physical and chemical methods. Isolation is a routine process in molecular biology or in molecular analyses.
• Electrophoresis chamber
• Gel casting trays
• Sample combs
• Ethidium bromide
• Loading buffer
Column chromatography was set up using a 60 ml syringe clamped to a ring stand. The syringe was plugged using a small amount of cotton. An Erlenmeyer flask was placed underneath the column to collect any excess material. Eleven 20 ml vials were labeled numbers 1 through 11. Silica gel was measured to 42 ml using a graduated cylinder and then moved into a 150 ml beaker. A slurry was created by adding 50 ml of hexane to the beaker containing the silica gel. The slurry was stirred for…
The aim of this experiment is to determine through calculations the concentration of acetic acid content within a common white vinegar.
Apparatus / Materials
Volumetric flask and lid
Volumetric pipette/s (5mL, 20mL)
Place the plastic tray on the electronic scales and press tare to set the wither to zero;
Weigh out 0.7993g of Sodium…
To begin, we put 200mL of water with one drop of green food coloring into a pie tin. We then mounted the short candle into the clay in the center of the pie tin. After, we lit the candle, waited approximately five seconds and bottled the candle. Lastly, we waited for the flame to go out and measured how high the water rose in the bottle. This process was repeated for the medium and tall candle as well.
Height of Candle
Height Water Rose in Bottle