Expeirment 3: Composition Of An Aluminum-Zinc Alloy

Question 1

What is the purpose of this experiment?

Answer 1

Determining the amount of aluminum present in an aluminum-zinc alloy.

Question 2

What will be the principle for determining the amount of aluminum present in the aluminum-zinc alloy?

Answer 2

The fact that the amount of hydrogen produced by one gram of zinc is different from the amount of hydrogen produced by one gram of aluminum.

Question 3

In this experiment, what are the mole ratios for the amount of zinc and aluminum required to produce certain moles of hydrogen respectively?

Answer 3

1 mol Zn —-> 1 mol Hydrogen Gas

2 mol Al —-> 3 mol Hydrogen Gas

Question 4

How many moles of hydrogen does 1 gram of Zinc and Aluminum produce?

Answer 4

1g Zinc —-> 0.0153 mol H2

1g Al —-> 0.0556 mol H2

Question 5

What is the equation for the ideal gas law and what are the units?

Answer 5

PV= nRT. (ATM For pressure, Liters for Volume, moles for N, Latm/molK for R, and Kelvin for Temperature)

Question 6

What is the equation for the total pressure of gas?

Answer 6

P= P H2+ P H2O

Question 7

What is the equation for determining the pressure of the hydrogen gas?

Answer 7

P H2= P Bar- P H2O

Question 8

What is the equation for calculating the moles of H2 required using the given grams of zinc and aluminum?

Answer 8

N H2= a (0.0556) + z (0.0153). A= grams of aluminum; Z= grams of Zinc A>Z

Question 9

What is the final form of the equation for measuring the amount of moles of hydrogen gas?

Answer 9

N H2= (%Al/100)(0.0556)+(100-%Al/100)(0.0153)