ch11 gas stoch lab

GAS STOCHIOMETRY LAB NAME______________

DATA:

Mass penny before_________

Mass penny after __________

Total Pressure (barometer) __________

Temperature _______ C = ________ K

CALCULATIONS:

Mass of zinc reacted ________ - _________ = _________g

Moles of zinc ________ g / ____________g = _________mole**

Word equation :

Balanced equation: ___ Zn (s) +___ (aq) = ___(g) + ___(aq)

Mole ratio1 mole of Zn makes ___ moles of hydrogen, therefore

_______mole** Zn should make _______ moles of hydrogen.

calculate the pressure of the dry hydrogen, using dalton's law ________mmHg

Calculate the volume (predicted) of hydrogen gas using igl

P V= n R T ( PV=nRT)(R is constant)

___ mmHg * V = ____mol * _____ * ____K ; n =_________

CONCLUSIONS:

put required measurements and results on this form class data (not available until day due)

What law of motion is demonstrated?______________________________________

What vehicle uses this fuel/ law _____________________________________

________________was the limiting reactant and _____________ was the excess reactant in the film canister; ________________was the limiting and _____________ was the excess reactant in the rocket demonstration.

What is produced when hydrogen burns?____________________________________ Write the equation for the reaction.

____________________________________________ (include states)

Why was the bottle crushed?___________________________________

What would happen if a full bottle of hydrogen was used?__________________

_____________________________________

Which is more reactive, Cu or Zn? __________ How can you tell?

_______________________________________________

Where is the zinc chloride? ____________________________________

What gas is mixed in with hydrogen when it is collected? _______. How is it accounted for in calculation? What gas is mixed in with the hydrogen before the rocket demonstration? __________ Why?

worried about destroying pennies? read this - taken from penny smashing machine: