The Establishment of a Chemical Equation Using the Method of Continuous Variation.
chem labYoav Arjang 9/30/2012
AP Chemistry Lab Report
I. Introduction:
a) Title: The Establishment of a Chemical Equation Using the Method of Continuous Variation.
b) Purpose: the continuous variation method is used to establish a chemical equation by displaying on a line graph the change/difference in temperature caused by the composition of acids and bases in the solution.
II. Apparatus and Materials:
A) Goggles
B) Acid
C) Base
D) Digital Thermometer
E) Pipet (10ml and 100 ml)
F) Buret
G) Plastic foam cup
H) Beaker
III. Outline of Procedure: For each system, measure the quantities of the reactants with a buret. Measure the reactant having the smaller volume into a plastic- foam cup; measure the other into a smaller beaker. Measure the temperature of each solution and record the average of the two temperatures to the nearest 0.01˚C. Pour the solution contained in the beaker into the foam cup and stir with the thermometer. Continue stirring for one or two minutes, then record the maximum temperature obtained to the nearest 0.01˚C. Rinse the foam cup and beaker. Wipe, dry, and make another run. When all the runs are finished, plot a graph showing delta t versus volume of reactants. From the molarity of each reactant and the volume used, find the number of moles of each used to produce the maximum temperature.
nMOH+ H(11)X = .
A) Find the number of moles of base used per mole of acid.
B) find the heat of reaction (Delta H) in kilocalories (kcal) per mole of bas used, assuming the specific heat of the solution to be 1.00 Cal/degree-gram and the density of the solution to be 1.00 g/ml. use the delta t for the run nearest to that producing a maximum temperature in which there is an excess of acid used, or the value at the maximum of your curve.
C) Write a completely balanced equation for your
AP Chemistry Lab Report
I. Introduction:
a) Title: The Establishment of a Chemical Equation Using the Method of Continuous Variation.
b) Purpose: the continuous variation method is used to establish a chemical equation by displaying on a line graph the change/difference in temperature caused by the composition of acids and bases in the solution.
II. Apparatus and Materials:
A) Goggles
B) Acid
C) Base
D) Digital Thermometer
E) Pipet (10ml and 100 ml)
F) Buret
G) Plastic foam cup
H) Beaker
III. Outline of Procedure: For each system, measure the quantities of the reactants with a buret. Measure the reactant having the smaller volume into a plastic- foam cup; measure the other into a smaller beaker. Measure the temperature of each solution and record the average of the two temperatures to the nearest 0.01˚C. Pour the solution contained in the beaker into the foam cup and stir with the thermometer. Continue stirring for one or two minutes, then record the maximum temperature obtained to the nearest 0.01˚C. Rinse the foam cup and beaker. Wipe, dry, and make another run. When all the runs are finished, plot a graph showing delta t versus volume of reactants. From the molarity of each reactant and the volume used, find the number of moles of each used to produce the maximum temperature.
nMOH+ H(11)X = .
A) Find the number of moles of base used per mole of acid.
B) find the heat of reaction (Delta H) in kilocalories (kcal) per mole of bas used, assuming the specific heat of the solution to be 1.00 Cal/degree-gram and the density of the solution to be 1.00 g/ml. use the delta t for the run nearest to that producing a maximum temperature in which there is an excess of acid used, or the value at the maximum of your curve.
C) Write a completely balanced equation for your