Calculations:
1) From your data, calculate the number of moles of hydrogen gas produced from mass of magnesium.
Mg(s) + 2HCl(aq) = MgCl2(aq) + H2(g)
2) From your data, calculate the number of liters of hydrogen gas at Standard Pressure and Standard Temperature, or V2. The following formula is referred to as the Combined Gas law, this is perhaps the most fundamental of all gas formulas, and one of the most useful.
P₁V₁. P₂V₂
____ = _____
T₁ T₂
The variable P₁ is your pressure of hydrogen gas you produced in the reaction.
Phydrogen = P1, this is the pressure of hydrogen gas you generated in the reaction. You subtract your maximum hydrogen pressure from atmospheric pressure, in kPa or atm
Vi is the volume of the flask you carried the experiment out in, in liters
Ti is the mean temperature of the hydrogen gas in this experiment, in Kelvin.
P2 is the Standard Pressure, this is a constant, so never changes and is 101 kPa or 1 atm
V2 is what you want to solve for, in liters
T2 is the Standard Temperature, also, this never changes and is 273 K
Fill in the values then solve for the Standard Volume of a gas (V2) in liters. SHOW YOUR
CALC!
P₁ =
P₂ =
V₁ =
V₂ =
T₁ =
T₂ =
