Magnesium, like many metals, reacts with acid to produce hydrogen gas in this experiment we will measure the amount of hydrogen gas produced from the reaction of mg and hcl (aq) with data collected from this experiment and the ideal gas law, we will find the number of moles of hydrogen gas that are generated. The reaction of magnesium with hydrochloric acid in this experiment you will determine the volume of the hydrogen gas that is produced when a sample of [hint: you can use combined gas law and ideal gas law] 2 2 1 wet, h o 1 2 dry, h 2 p 968 kpa v 448 ml t 20 c + 273 = 293 k. From the ideal gas law, pv = nrt, you can see that it is possible to determine a value for r if you can isolate a sample of gas for which p, v, t and n are all known in this experiment you will accomplish this by collecting hydrogen gas formed in the reaction of magnesium metal with hydrochloric acid.
2 gas formed, and with that, the mass of magnesium metal that reacted (assuming hcl is in excess) can be calculated using the ideal gas law and stoichiometry a mg ribbon will be held in a gas buret containing the hcl and inverted in a beaker of water. The number of moles of hydrogen gas collected can then be calculated from the ideal gas law: (n = # moles h 2) n = pv (use ph 2 here, not p total) rt this will give you the experimental # moles of hydrogen gas collected mass of magnesium metal g volume of gas ml temperature of gas (assumed to be the same temp as the water) c. Atomic mass of mg by using the ideal gas law introduction magnesium, like many metals, reacts with acid to produce hydrogen gas in this eperiment we documents similar to 5 gas law lab combined gas law lab report hjm research uploaded by helen ap chemistry lab heat of reaction uploaded by claudia huo.
The ideal gas law, which is applicable to most simple gases at room temperature and moderate pressures, states that the pressure (p), volume (v), absolute temperature (t), and moles (n) of a gas sample are mathematically related according to equation 2 above. Prelab assignment: experimental determination of the gas constant the gas constant is found in the ideal gas law write the equation for this law 3 the magnesium ribbon used in this reaction must be carefully handled a what must you avoid doing with the magnesium ribbon at the lab bench (hint, see procedure #2. Assume ideal gas behavior 4 a 01375-g sample of solid magnesium is burned in a constant -volume bomb calorimeter that has a heat capacity of 3024 j/ degree c. Worksheet 7 - ideal gas law i ideal gas law the findings of 19th century chemists and physicists, what is the standard molar volume of an ideal gas 224 l products are hydrogen gas and magnesium chloride what volume of. Since the coefficients of magnesium metal and hydrogen gas are the same in the balanced chemical equation, if 000305 moles of hydrogen gas was produced, then the sample of magnesium reacted also must have consisted of 000305 moles.
Magnesium will be the limiting factor in this experiment, excess of hydrochloric acid will react completely with magnesium to give hydrogen gas and magnesium chloride the yield of hydrogen gas is depend on the amount of magnesium used, thus the volume of hydrogen gas collected can be used to determine the x number. Determination of the universal gas constant, r objective: ideal gas law, 𝑃𝑃𝑉𝑉= 𝑛𝑛𝑛𝑛𝑇𝑇 (11) where r is the proportionality constant known as the universal gas constant by reaction of magnesium with hydrochloric acid: mg(s) + 2hcl(aq) h. The ideal gas law to solve for r, the gas constant you’ll be measuring the properties of elemental hydrogen gas , which you can produce in a known quantity by reacting a measured amount of magnesium metal with hydrochloric acid. Witzgall chemistry: ideal gas lab #1 - reacting magnesium with hydrochloric acid to find the gas constant.
The ideal gas constant these four variables are related by the ideal gas law: pv = n rt, where r is a constant that the products are usually the salt of the metal plus hydrogen gas for example, magnesium reacts with hydrochloric acid and mg (s) + 2 hcl (aq) → mg cl 2(aq) + h. Help with chemistry and the ideal gas law what is the mass of a piece of magnesium wire which produces 3930ml of hydrogen gas collected over water at 230degrees c and at a pressure of 752torr i feel like im extremely off but here is what i got: advanced chemistry, ideal gas law answer questions determine energy (in kj/mol. Using the sum of partial pressures rule and the ideal gas law to find moles, the molar mass of mg (s) can be calculated only knowing the pressure of h 2 (g) experimental first, a strip of magnesium metal was obtained and weighed on an analytical balance. How do you calculate the number of moles of hydrogen produced when magnesium reacts with hcl i did an experiment on the quantitative analysis of gases and the volume of h2 produced is 141cm3, the ideal gas law is pv = nrt where r is the gas constant 8314 j mol-1 k-1, the mass of mg used is 0014g and i have this value: 00802 atm dm3 k-1 mol.
As you saw in lecture, when 110 g of magnesium reacted with 3000 ml of 0800 m hcl, the products were hydrogen gas and magnesium chloride what volume of hydrogen gas would be collected if the reaction had been. Astronomical applications of the ideal gas law: the taurus molecular cloud consists of dust and various gases, including hydrogen and helium the density form of the ideal gas equation may be of theoretical use when studying such astronomical phenomena as star formation. Experimental determination of the molar volume of an ideal gas introduction: the term, rearrange the ideal gas law so that all the variables are on the left side of the equation, and how many moles of gas are produced if 0037 g of magnesium reacted (watch your significant figures hint: how many sig fig are in 0037 g).