CHEM 110L Laboratory Page


CHEM 110L - Experiments 1 and 2 - .pdf downloads
 
You may download the .pdf file containing the first two experiments in the CHEM 110L lab manual by clicking on the down-arrow symbol near the right margin at the line at the bottom of this page.  You will need to purchase this lab manual from the NYIT Bookstore as soon as possible, and bring it with you to all laboratory class meetings beginning with the second week of the semester.
 
Please read the directions for these first two lab experiments as soon as possible.  It is especially important that you become thoroughly familiar with the material that deals with significant figures on pages 3 and 4, because you will need to record measurements and perform calculations using the correct number of significant figures throughout the semester.
 

This page contains links to YouTube videos and other files that your CHEM 110L lab instructor may want to show to the class before the chemistry lab experiment begins.


Exp't #2 - Solubility
 
In this experiment, you will determine how the solubility of your unknown (expressed in grams of unknown per 100 g of water) varies with the temperature.  These solubility plots are almost always curves such as the following:
 
 
Please note that for simplicity, dots on the practice graph that you have drawn on page 9 have been chosen so that the practice solubility "curve" is just a straight line.  Please make sure that the solubility curve that you draw for your unknown in Experiment 2 is an actual curve instead of just a straight line.
 

 
Types of Pipets
 
You may be given one or both of the following types of pipets for use in this experiment.

 
A volumetric (transfer) pipet is the most accurate pipet that you can use, but it is designed to transfer only one specific volume of solution.  Instructions are provided for:  (1) rinsing the pipet, (2) using the pipet to transfer the desired solution, and (3) cleaning the pipet after use.
 

Using a volumetric (transfer) pipet

 
  
A Mohr (graduated) pipet is the most versatile pipet that you can use, because it can deliver any volume ranging from 0.0 mL to the maximum volume stated on the pipet.  However, because a Mohr pipet is wider than a volumetric pipet, it is not as accurate.  Remember to use only a volumetric pipet if you really need to transfer the liquid very accurately. use.

Using a Mohr (graduated) pipet

 
 
 

 
Exp't #3a - Density
 

Introduction to Vernier Calipers - music‎


Please watch the instructions in the following video up to 1:24.

Vernier Caliper Simulation (1017) Instructions



Then practice using the java simulation marked "Vernier Caliper (1017).jar" at the bottom of this page.
 

Reading Vernier Calipers


Easy Java Simulations - download the .jar file you want to run at the bottom of this page
File marked 841:  easy to use; slider at the top controls the length of the object  (RECOMMENDED)
File marked 1452:  latest version, excellent fine tuning of vernier scale position
File marked 1017:  most complicated simulation; it has a magnifier

 

 
Exp't #4 - Changes and Substances
 
 
Elements, Mixtures, and Compounds
 

Elements, Mixtures, and Compounds

 
 
 
Introduction to Physical and Chemical Changes
 

Identifying Chemical Changes

 
 
 
Physical and Chemical Changes  (Part 1 of 2)
 

Physical and Chemical Changes (Part 1 of 2)

 
 
Physical and Chemical Changes (Part 2 of 2)
 

Physical and Chemical Changes - Part 2 (of 2)

 
 
 

 
Exp't #5 - Percent Composition of Magnesium Oxide
 

Formation of Magnesium Oxide

 
 

 
Exp't #6 - Formula of a Hydrate
 

Hydrate Lab Experiment

 
 
 

 
Exp't #7 - Chemical Reactions of Copper
 

Chemical Reactions of Copper


 
 
Exp't #8b - Specific Heat
 
 
 
 

 
Exp't #9 - Chemical Periodicity
 
 
 
 

 
Exp't #10 - Determination of the Gas Constant R
 

Potassium Chlorate and the Gummy Bear

 
 

 
Exp't #11 - Molecular Weight of a Volatile Liquid
 
 
 
 

 
Exp't #12 - Colligative Properties
 
 
 
 

 
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babyboomer46,
Sep 17, 2017, 11:02 AM
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Vernier Caliper (1017).jar
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Vernier Caliper (1452).jar
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VernierCaliper (841).jar
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babyboomer46,
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