Modeling Chemistry 1 U4 Dalton
Name
Date Pd
Chemistry – Unit 4 Notes - Dalton’s Playhouse
In the late 18th century, Joseph Priestly, Antoine Lavoisier and others performed some critical
experiments that helped Dalton develop his theories on the atomic model of matter. The
simulation at the website:
http://web.visionlearning.com/dalton_playhouse/ad_loader.html
will allow you to replicate some of the key experiments these scientists performed. Answer the
questions on the website and keep track of your responses on this notes sheet.
Part 1 – Priestley
Calx
100g
200g
216.59g
Mass of product
Volume of product
1. What happened to the mass of the material in the flask as it was heated?
2. What did you note about the masses of the gas produced and the mercury metal left in the
flask?
3. State the relationship between the volume of gas produced and the mass of the calx that
was heated.
Part 2 – Lavoisier
You will need to record the initial and final values for oxygen and phlogiston in each of the
trials order to complete the table below.
Used in Reaction
Original
amount
Burn 1/3
Burn 2/3
Burn all
Mass oxygen
Mass phlogiston
Mass of product
Volume oxygen
Volume phlogiston
Volume of product
1. With relation to the volumes of the gases, in what specific proportion did phlogiston react
with oxygen?
2. How did the mass of the gas in all three vessels before burning compare to the total mass
after burning?
