TURNUWN METAL- Part 1 pat page 1 of 3) 8. EQUIVALENT MASS OF AN UNKNOWN METAL-...
Experiment 12: Generating Hydrogen Gas Part B: Molar mass of unknown metal Unknown #: Mass of unknown metal (X) .29 Volume of H2 gas L mL Temperature of H; gas 20 mm к C Atmospheric pressure (see barometer) Vapor pressure of water mmHg Partial pressure of H; gas mmHg atm Using PV-nRT and your data, calculate the moles of hydrogen gas produced in the experiment: l e epl8 moles H Convert moles of hydrogen gas to moles of the metal...
3. If equivalent amounts of heat are absorbed by 1 mol of Metal A (molar mass = 78 g/mol) and 1 mol of Metal B (molar mass = 100 g/mol), which shows the greatest rise in temperature? (Hint: Assume the metals obey Dulong and Petit's law.) Explain your reasoning.
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Equivalent Weight of an Unknown Metal Experimental Set Up DISCUSSION: Consider the balanced equations for the following reactions of metals with HCl, each written for the production of į mole of H2 (one equivalent of H2) Na + HCI --> NaCl + H2 Ź Mg + HCI -> į MgCl2 + H2 į Al + HCI -> AlCl3 + H2 a. What additional datum would be needed in order to find the atomic mass of...
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What Metal Oxide Has Been Formed? Final Lab Submission Purpose: The main purpose of this lab is to weigh and find out how oxidization has taken place along with calculations. Experimental Data: Mass of dry crucible = 31.373 Mass of metal = 0.0318 Mass of crucible and metal = 31.404 g Mass of crucible and metal after experiment = 31.418 Discussion: 1. Based on what you know about the...
What Metal Oxide Has been formed? Final Lab Submission Purpose: (5 points) In 2-3 sentences concisely state the purpose of the laboratory and what knowledge this lab helped to further develop Experimental Data: (10 points) List all data that was collected from this experiment to help you determine the molecular formula of the metal oxide that you formed. Be sure that you clearly label what each value represents and includes the correct significant figures and units. Example: Mass of the...
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Page < 2 > 0f50 - 200M + 3. Explain fully the purpose of vapor pressure of water in calculations of partial pressure of Hydrogen gas in this experiment. Page < 1 > of 3 d EQUIVALENT MASS OF AN UNKNOWN METAL INTRODUCTION Active metals react with strong acids to produce hydrogen gas. These are oxidation-reduction Li+ HCl – Lic1+52 reactions. Li+...
PART C: Determining the Molar Mass of an Unknown Acid by Titration: (2 points) Balanced chemical equation for the reaction of a generic diprotic acid (H2A) with NaOH:
Approximate Molar Mass of Metal (g/mole) (Equation 3) Compare your molar mass to the following list of metals: aluminum, copper, zinc, tin, platinum, iron, nickel, silver, titanium, tungsten Unknown metal: Part B: Energy Content of Foods Mass of stopper assembly (pan, paperclip, and stopper) Mass of empty test tube + beaker 59.92 g 175.77. 185.60 g Mass test tube + 10mL water + beaker Mass of water Burning Foods: Type of Food Froot Loop Cheeto Puff Popcorn Marshmallow Mass Assembly...
Pre-Lab Questions 1. Write the formula and determine the molar mass for the metal carbonate of each of the first three elements in Group 1. 2. If 2.175 g of each metal carbonate were weighted out, how many moles of each substance would you have Calculate the number of moles of CaCl2 in 125 mL of 0.2 M CaCl solution.
1. Consider the following data for aluminum, Cu, and an unknown metal z cu metal Z 10. Metal Mass (8) Specific heat (3/8°C) Initial temperature (°C) Final temperature (Al/cu) Final temperature (Al/Z) 10.0 0.900 40.00 51.25 48.50 30.0 0.385 60.00 51.25 55.00 48.50 a) When Al and Cu are placed in contact with each other, the final temperature of the metals is 51.2°C How much heat is exchanged between the two metals? b) When Al and the unknown metal Z...