An unknown metal strip was placed in H2SO4. Use data table to determine identity of metal and its molar mass. Show all work.
InitialMass: 9.3698g
FinalMass: 9.4443g
Avg.Current:0.5263A
Time:3mins
FaradaysConstant: 96548 C/mol e-
NFactor:2electrons
According to faraday's 1st law of electrolysis:
The amount of chemical change produced by the current at an electrode-electrolyte boundary is proportional to the quantity of electricity used. Here chemical change means the amount of metal deposited.
Faraday's laws can be summarized by
where:
In electrolysis, , where I is the current in Amperes and t is time in seconds
The metal that has this particular atomic weight is Europium .
An unknown metal strip was placed in H2SO4. Use data table to determine identity of metal...
The specific heat of an unknown metal is 0.219 J/g.°C. Use Dulong and Petit's equation for finding Molar Mass (Dulong and Petit's constant is 24.6 J/mol.°C) to identify the metal using its Molar Mass from the Periodic table. Ο Ο Ο Ο Ο
4. A 200.0mL flask of an unknown gas was placed in a hot water bath. The temperature of the bath was found to be 99°C. The pressure of the flask was 733mmHg. The flask with the unknown gas in it had a mass of 126.593g. The same flask weighed 125.623g when it was empty. Determine the mass of the unknown gas in the flask. Determine the Molar Mass of an unknown gas. Assume that the Ideal Gas Law is obeyed...
5. An unknown metal carbonate was analyzed gravimetrically and yielded the following data. Calculate the values for lines d - i. a. Mass of dried M2CO3 1.972g b. Mass of filter paper 0.598g c. Mass of filter paper +CaCO3 2.436g d. Mass of CaCO3 (c-b) e. Moles of CaCO3 f. Moles of M_C03 (= e) g. Molar mass of M_C03 (a/f) h. Identity of M.CO i. Percent error Show your calculations here:
A carbonate salt with an unknown metal MCO3 reacts with sulfuric acid to produce MSO4, carbon dioxide gas and water and hydrogen gas. MCO3 (s) + H2SO4 (aq) ---> MSO4(s)+ CO2(g) + H20 (1) a) If 11.75 mL of a 0.1000 mol/L solution of sulfuric acid is reacted with 0.231 g of the MCO3. What is the molar mass and identity of the metal in the carbonate salt? b) What volume (in mL) of carbon dioxide gas is produced at...
4. What is the average specific heat capacity of the unknown metal in this experiment? 5. What is the unknown metal? Use Table 1 for reference. Table 3: Specific Heat Data Time (minutes) Temperature (°C) Trial 2 Trial 1 Trial 3 Initial 40 40 39 5 minutes 41 42 41 6 minutes 43 43 42 7 minutes 44 45 44 8 minutes 45 45 45 9 minutes 46 46 45 10 minutes 47 47 47 Average Specific Heat Capacity of...
Final Temperature is 125 g Use the table below to identify the type of metal in the object WEC Wwter 134 10 Copper ONS 0.0920 0.214 0.128 0.306 00125 Unknown metall 29.58 180°C 125 g 20.00°C Mass of metal (8) Initial temperature of metal ["C) Mass of water in the calorimeter (e) Initial temperature of water in the calorimeter (°C) Final temperature of water and metal ("C) Change in water temperature (AT . C) Energy absorbed by water (www.) Energy...
A carbonate salt with an unknown metal MCO3 reacts with sulfuric acid to produce MSO4, carbon dioxide gas and water and hydrogen gas. MCO3 (s) + H2SO4 (aq) ---> MSO4 (s)+ CO2 (g) + H2O (l) a) If 11.75 mL of a 0.1000 mol/L solution of sulfuric acidis reacted with 0.231 g of the MCO3. What is the molar mass and identity of the metal in the carbonate salt? b) What volume (in mL) of carbon dioxide gas is produced...
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...
Data and Results: Calorimetry A. Specific Heat: Unknown metal number Unknown solid number Trial 2 Trial 1 42.SI3 Mass of test tube and stopper Mass of stoppered test tube and metal Mass of calorimeter Mass of calorimeter and water Mass of water Mass of metal Initial temperature of water in calorimeter Initial temperature of metal Equilibrium temperature of metal and water in calorimeter 38.394g 53 13 g 63 to2g 0o C water (inal-onitiat oC oC Imetal qwater Specific heat of...
3. A student was given an unknown metal. The student determined that the mass of the metal was 30.2 g. The student placed the metal in a graduated cylinder filled with 20.0 mL of water. The metal increased the volume of water to 22.9 mL. Calculate the density of the metal and determine the identity of the metal using the table below. Metal Density (g/mL) 11.3 Lead Silver 10.5 Nickel 9.90 Zinc 7.14 010000 Word