Chemistry Experiment Essay

1154 Words Mar 28th, 2013 5 Pages
Lab Report
Experiment 1 & 2

Amele Takpara
Partner: Jessamyn Dupree
Experiment 1
(Pre-Lab Questions)

1. In the design of a Bunsen burner, explain the purpose of
a. the gas control valve
The gas control valve regulates the rate at which methane enters the burner.

b. and the air vents.
The air vents control the rate at which air enters the burner

2. Why is a luminous yellow flame often ‘‘smoky’’?
The luminous yellow flame is smoky because no air is entering the burner and hydrocarbon is converted into carbon dioxide

3. A student wanted 20.000 g of a salt. Which balance should the student use in order to
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We have also learned how to use the laboratory Bunsen burner.
The Bunsen burner consists of a metal stand, a gas line connector and a vertical metal tube in which methane (natural gas) is mixed with air to produce a clean burning flame. The amount of air (oxygen in the air) mixed with the gas flow affects the completeness of combustion. Air flow is controlled by opening or closing the valve: If the tube is adjusted so that more air mixes with the gas before combustion, the flame burns hotter, appearing blue (non-luminous). If the air holes are closed, it leads to incomplete combustion, producing a cooler but brighter yellow flame.
Data recorded taken in the laboratory are recorded exactly as read, directly onto a data sheet. All measurements consist of a number and a unit.
About length measurement, we’ve determined the smallest division on the ruler and the precision to which it must be read; we’ve measured and recorded the length, width and height of the block
Graduated cylinders are generally used for quick and fairly accurate measurements of liquid volumes; we’ve identified the smallest division and how to do accurate readings using an Erlenmeyer flask and a beaker.
For mass measurement, balances are indispensible tools that are

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