Question

V. DATA Insert data table prepared in pre-lab. Trial Mass Vfinal Vinitial Pressure Number Metal (g (ml) Vapor Pressure Pressure TH,。。C Temp (inHg) (mL) (torr) Value is found from standard table or meter VI. CALCULATIONS You must SHOW ALL WORK for calculations made in order to obtain a res guide your work but other calculations may be necessary in order to results clearly and always include units. substantiate results. Be sure to labe 1. Volume of wet H, collected (mL) ater in the Assuming that all of the gas generated when the metal reacts with the acid displaces w buret, determine the volume of gas collected. 2. Barometric pressure (atm) Convert your barometric pressure from inHg to atm (2.54 cm 1 inch) 3. Pressure of "dry" H, collected (atm) Assuming that the only two gases present in the volume of gas collected are hydrogen and water vapor, determine the pressure of the hydrogen gas. Be sure to use common units when solving for the pressure of hydrogen gas (Gee Equation 2). Moles of H, produced (n2) Assuming that the conditions of the ideal gas law are met, determine the moles of hydrogen gas generated in the reaction (sce ulate the average number of moles of H, produced 4. from the two trials. Pressure of Dry H Moles H2 Volume of Wet H, Trial Number Stoichiometry of 3 unknown metal Determine t in the introduction. che mec mine the molar mass of the meral for the thre posible u al for the three possible reaction stoichiometries as discussed 5.

what's the difference between wet H2 and dry H2?

Answer 1

In the given experiment, metal reacts with acid and the H₂ gas produced is collected by the displacement of water.Hence the gas collected is a mixture of H₂ gas and water vapor which is termed as "wet gas" and the pressure obtained will be pressure of H₂ gas + partial vapor pressure of water at the same temperature.(Aqueous tension)

Dry H₂ gas is the gas without water vapor.

Pressure of dry H₂ gas = Observed pressure - Aqueous tension.

Answer 2

In the given experiment, metal reacts with acid and the H₂ gas produced is collected by the displacement of water.Hence the gas collected is a mixture of H₂ gas and water vapor which is termed as "wet gas" and the pressure obtained will be pressure of H₂ gas + partial vapor pressure of water at the same temperature.(Aqueous tension)

Dry H₂ gas is the gas without water vapor.

Pressure of dry H₂ gas = Observed pressure - Aqueous tension.