Conditions Air Temperature: 72F Pressure: 761 torr Volume of Air Bag: 71 L
In this part of the project, you will use a small plastic bag to model an airbg. Rather than use the toxic sodium azide (NaN3), we will use baking soda (sodium bicarbonate) and vin
OBJECTIVES When you have completed this activity, you should be able to: 1. Compare population density of a region and relate to the quantum mechanical model of the atom. 2. Observe the effects of probability on electron distribution of an atom. MATERIALS
Analytical chemistry is the branch of chemistry that deals with the identification and analysis of
compounds and mixtures. For example, we may need to check the purity of a medicine before it is
packaged and sold, or a sample of a
Part I: Solve the following visually. Report all answers to the nearest tenth. Include units and show
1. The half-life of Cs-137 is 30 years. A sample of Cs-137 contains 16.0 g. How many grams of Cs-137
will REMAIN after 150 years?
2. If a sample of
Could you determine the exact position and momentum of a baseball as it soared through the air? Of course, you could-by taking timed series of snapshots of the baseball as it moved. Why then can't scientists follow a similar procedure to determine the pos
1. What are some of the reasons that companies add preservatives to personal care products?
Do you think their reasons are good? Why or why not?
2. Is the connection between parabens and breast cancer absolute? Explain in your own
words what you understan
Introduction: The Periodic Table is arranged according to the Periodic Law. The Periodic Law states that when elements are arranged in order of increasing atomic number, their physical and chemical properties show a periodic pattern. Students can discover
Purpose: Determine the percent composition of water in popcorn and compare the percent composition of water in different brands of popcorn.
Procedure: 1. Analyze one brand at a time. 2. Take four kernels of one brand and measure the mass. 3. Place the ker
Isotopes of m&m-ium
Date _ Per _
Elements commonly exist with differing numbers of neutrons. We call these elements isotopes and an
example is Bromine-79 and Bromine-81. These isotopes do not exist equally in nature. Br-79 is more
"Loopy" Dot Diagrams
Purpose: To build skills in drawing Lewis electron dot diagrams for individual elements To use dot diagrams to show how electrons can be transferred or shared to form bonds.
PCl3 MgCl2 CHCl3 CO2 O2
N2 NaCl H2
H2O Na2O HCl
Purpose: To use your knowledge of molarity and stoichiometry to predict and then calculate the actual mass of salt formed from the reaction of an acid and a base. Materials: 1-evaporating dish, 1-graduated cylinder, 0.5M HCl (aq), 0.5M NaOH (aq), hotplate
Background Information A steering wheel displaying the letters SRS (Supplemental Restraint System) is an indication of a steering wheel equipped with an air bag. If you are lucky you will never have to experience an airbag. But if you do have a front-end
Introduction: The purpose of this simulation is to experimentally determine the gas laws. You will do this using a computer simulation to collect your data. The simulation allows you to select a temperature, pressure, volume, and number of moles of gas fo
1. Write the balanced equation for the reaction between hydrochloric acid and sodium
bicarbonate (baking soda)
2. The coefficients in a balanced equation represent the number of moles of the
respective substances in the reaction. Determine the following m
Determine the optimal temperature and particle size for the reactions between an antacid and
Components of Project:
Experimental Methods: Draft 1 Due Tuesday, January 15 at end of class
Background Research, Data, and Analysis:
Pressure: 3.01 atm
Temperature: 310.0 K
Moles of Ne: 0.00 mol
1. Click the radio button on "Volume" so that it becomes the dependent variable.
2. Use the increase and decrease buttons on the He moles control to change the moles of gas.
A 6.00g sample of calcium sulfate hydrate (CaSO4.x H2O) is heated until all the water is driven off. The anhydrous compound has a mass of 4.77 g. Calculate the value of x in the formula.
a. what is the mass of water in the compound? b. how many moles of w
Day 1: a) Gather together the following: a 25 mL graduated cylinder, two 100 mL beakers, a plastic spatula. b) Using tape & a pen, label the 100 mL beakers "sodium carbonate " and "calcium chloride dihydrate". Put your name and your lab partner's name on
In this experiment, you will identify a mystery solute by making a solubility curve using 4
concentrations of the solute.
3 Test tubes
Test tube clamp and rack
400 or 600 ml beaker
1.Open up Excel and set up a table with the first 3 columns labeled as: Temp (C) Temp (K) Press The class will share the metal bulb and thermometer probes attached to 2 laptops. All data will be obtained from these 2 laptops. We will aim to take readings
Introduction: This lab highlights the following important points: Density is defined as the mass of an object per unit of volume: Density is an intensive property, meaning that for a given substance, it is constant, and does not depend on mass. Density ca