Chem 180 Lab
Although the world may disagree about many issues there is a commonality that continuously unites nations from all over the world, and it is a fundamental system in which the world cannot function without, the International System of Units (SI). The SI was established in 1960 by the 11th Conference of Weight and Measures; it began with 17 nations including the United States and today has become widely used among 51 nations (Historical). The SI is a metric system of units of measurement and is predominantly used in the scientific community to communicate and to be able to share research anywhere in the world. The SI system has common units such as; meters, kilograms, moles, seconds and Kelvins to measure length, mass, amount of substance, time and temperature (Historical). The SI system is very useful because it allows the world to communicate in a common language, without the system many tedious conversions would have to be made just to share knowledge throughout the world.
Purpose
While the SI system may be useful, it is useless without the knowledge of how to use it to make precise and accurate measurements. The objectives in the experiment are to learn how to use laboratory equipment to determine volume, mass and temperature. It is also important to learn how to combine units to determine concentration and density in order to measure the density and concentration in different dilutions.
Procedure
Exercise 1
Length Measurements
1) Gather DVD or CD, key, spoon and fork.
2) Measure the length of each item in centimeters with one degree of uncertainty, record.
3) Measure the length of each object in millimeters with one degree of uncertainty, record.
4) Convert measurements from millimeters to meters.
Temperature Measurements
5) Gather 100 mL glass beaker, lighter, cup, burner stand, burner fuel and a thermometer.
6) Turn the tap water to hot, wait 15 seconds then measure the fill the 100 mL beaker to 75 mL with hot tap water and measure the
Purpose
While the SI system may be useful, it is useless without the knowledge of how to use it to make precise and accurate measurements. The objectives in the experiment are to learn how to use laboratory equipment to determine volume, mass and temperature. It is also important to learn how to combine units to determine concentration and density in order to measure the density and concentration in different dilutions.
Procedure
Exercise 1
Length Measurements
1) Gather DVD or CD, key, spoon and fork.
2) Measure the length of each item in centimeters with one degree of uncertainty, record.
3) Measure the length of each object in millimeters with one degree of uncertainty, record.
4) Convert measurements from millimeters to meters.
Temperature Measurements
5) Gather 100 mL glass beaker, lighter, cup, burner stand, burner fuel and a thermometer.
6) Turn the tap water to hot, wait 15 seconds then measure the fill the 100 mL beaker to 75 mL with hot tap water and measure the
References: "Historical and International Aspects of the SI." Historical and International Aspects of the SI. Web. 05 June 2012. . Lab Paq Manual. Questions