Copper deposited on a copper sulphate solution
Question: What mass of copper would you expect to be deposited from a copper (II) sulphate solution using a current of 0.50 A over 10 seconds?
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HxCyOz + NaOH --> xH2O + NaxCyOz If 27.33ml of 0.0973M NaOH were used to titrate 0.328g of pure unknown carboxylic acid, determine the number of reactive H in a single molecule of the carboxylic acid.
A third sample, of mass 5.66 g was burned under different conditions to yield 2.49 g of HNO 3 as the only nitrogen containing product. Calculate the empirical formula of the compound.
An acid with a Ka of 1 x 10-8 is titrated with NaOH, both solutions being 0.020 M. What should the Ka of the indicator be, in order to obtain the best end point
How many kilojoules of heat energy would be liberated if 220.6 g of propane were combusted in the presence of 320.0 g of oxygen given the balanced chemical equation below and its corresponding enthalpy data? Assume 98.00 % yield.
A 0.150 M NaCl solution is referred to as a physiological saline solution because it has the same concentration of salts as normal human blood. Calculate the mass of NaCl needed to prepare 275.0 mL of a physiological saline solution.
Consider the following system in equillibrium CaCO3(s) = CaO(s) + CO2(g) How many phases are present. Explain.
An open flask contains .200 mol of air. Atmospheric pressure is 745 mm hg and room temperature is 68 degrees Fahrenheit. How many moles are present in the flask when the pressure is 1.10 ATM and the temperature is 33 degrees Celsius
Calcluate the energy required to convert 1.70g of ice originally at -12.0 oC into stream at 105oC. The other two answers on this site are completely different from the solutions manual.
Given that the heat of fusion of water is -6.02 kJ/mol, that the heat capacity of H2O (l) is 75.2 J/mol*K, and that the heat capacity of H2O (s) is 37.7 J/mol*K, calculate the heat of fusion of water (in kJ) at -14 C.
A 0.481 gram sample of an unknown acid (HX) required 28.95mL of 0.2103M NaOH for neutralization to a phenolphthalein endpoint. What is the molar mass of the acid?
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