Chemistry Lab 4-4

1. Start Virtual ChemLab and select Boyle’s Law: Pressure and Volume from the list of assignments. The lab will open in the Gases laboratory.

When your graph is completed, click the camera icon () to take a snapshot. Paste the image into a blank word-processing document, and label the graph “Volume vs. Pressure.”

7) The gas accumulation in the balloon was measured and recorded at one minute intervals for a total of 10 minutes (qualitative observations were included)

30. Cap the alcohol bottle and remove it from the work area. 31. Fill a test tube about 1/3 full with cold tap water for use in step 34.

properties of gasesLab Report for Experiment # 1 Properties of Gases Student's Name Lisa Anthony 20/20 Date of Experiment 09/29/2013 Date Report Submitted Please leave nothing blank Title: Properties of Gases Purpose: To investigate some physical and chemical properties of gases To use these properties to identify these gases when they are encountered Procedure: Have you made any changes to the procedure? Please explain. If you made no changes, state so. (1 point)

Present all relevant data in a data table below. Include an observations section for any observations you made during the lab. Make sure you note the data needs to be converted before graphing.

Data Tables and Observation: Fill out the data sheet (below) for the experiment and submit with this form. Recording data carefully

Mass and volume 3. The volume of a fixed mass of a liquid sample increases as the temperature rises from 20 to

Table 2. Moles of CaC2O4 H2O precipitated (mol) .0045 (mol) Moles of limiting reactant in salt mixture (g) CaCl2 .0004 (mol) Mass of limiting reactant in salt mixture (g) CaCl2 .4995 (grams) Mass of excess reactant in salt mixture References Tro, Nivaldo. Chemistry A Molecular Approach. 3rd ed. Boston, MA: Pearson Education, Inc.; Beran, J. A. Laboratory Manual for Principles of General Chemistry. 8th ed. Hoboken, NJ: John Wiley & Sons, Inc.; 2009

7. Use data from Table 13.4 to calculate the freezing and boiling points of the following solutions.

In experiment 10, the class was asked to demonstrate the basics of gas laws in order to understand the peeled egg Erlenmeyer flask demonstration. This experiment helps demonstrate Boyle’s Law and Amontons’ law for the class to gain an understanding of related gas laws for our thermodynamic knowledge.

Koczanski, Krystyna; Xidos, James D. CHEM 1300 Laboratory Manual; UMSU Copy Centre: Winnipeg, MB, Canada, 2013, pp

EXPERIMENTAL The first part of the lab was initiated to figure out the relationship between pressure and volume. First, materials and chemicals were prepared. The LabQuest was properly setup and ready to use to collect data. The power adapter was plugged into the left side of the LabQuest machine. In Channel 1, the gas pressure sensor was plugged in. The settings were changed to “Data Collection”, “Events with Entry” for mode, “1” for the number of columns, “Volume” for name box, and “mL" for unit box. After the LabQuest was set up the syringe used in conjunction with the gas pressure sensor was prepared. Before the syringe was connected to the sensor, the plunger within the syringe was adjusted until the tip of the inner most black ring was parallel to the 10.0 mL line. Next, the syringe was connected to the valve of the gas pressure sensor, making sure not the over-tighten the connectors. The connectors are made of plastic and can break, but making sure the connected syringes are firmly attached will avoid inexact information. When recording the volume of the syringe into the LabQuest, 0.8mL should be added the volume to make the data more precise because there was extra space in the gas pressor sensor. By selecting “Collect”, the

Experimental: Data was provided as “Experiment 1: Determining the Ideal Gas Constant”, see attachment. An excel spreadsheet was used to enter provided data, calculate conversions and plot a graph showing that data and its trend line. Data for NaHCO3 and Na2CO3 was used.

UNIVERSITY OF CAMBRIDGE INTERNATIONAL EXAMINATIONS General Certificate of Education Advanced Subsidiary Level and Advanced Level CHEMISTRY Paper 1 Multiple Choice Additional Materials: Multiple Choice Answer Sheet Soft clean eraser Soft pencil (type B or HB is recommended) Data Booklet 9701/13 May/June 2010 1 hour *2288633369* READ THESE INSTRUCTIONS FIRST Write in soft pencil. Do not